For biology, life history, monitoring and management, How to Reduce Bee Poisoning from Pesticides, Alfalfa Leafcutting Bee (Megachile rotunda) Pests, Horticultural, Landscape, and Ornamental Crops, Field Characteristics of Fruit-Tree-Attacking Spider Mites in the Pacific Northwest, Pests of Cabbage and Mustard Grown for Seed, Pests of Rutabaga and Turnip Grown for Seed, Biology and Control of the Garden Symphylan, Bean, Dry Cultivar Resistance to Bean Common Mosaic, Grape (Vitis spp.) Don’t worry, we have the answers to your burning soft scale questions. Quite often it is mistaken as some sort of fungus or scab that grows on the side of a plant. When honeydew falls from a tree, leaves shouldbe inspected for live soft scales or mealybugs. Cottony camellia scale, Pulvinaria floccifera, is related to other cottony scales such as cottony maple leaf scale, Pulvinaria acericola, and cottony maple scale, Pulvinaria innumerabilis. Infestations are most easily noticed during the summer when females produce white, cottony egg sacs that resemble pieces of popcorn on a twigs. Cottony Maple Scale (Pulvinaria innumerabilis) (soft scale): Large (3/8”) scales attached to undersides of branches. The "cotton" is actually waxy threads covering as many as 1,500 eggs. © 2012 - CNRTL 44, avenue de la Libération BP 30687 54063 Nancy Cedex - France Tél. Life History. Cottony Maple Scale has one generation per year, and understanding its life cycle is crucial for management of this pest, because not all pesticides will be effective at all insect life stages. Scouting and thresholds Inspect plants in spring for cottony egg sacs on twigs and leaves. Each mass usually contains 1,000-1,500 eggs. Cottony Maple Scale Pulvinaria innumerabilis Mated, immature female scale overwinter on stems. ma-turity is the most conspicuous scale insect indigenous to the United States, and has received much attention from entomologists and hor-ticulturists on account of its occasional abundance. Initially a pest of citrus in California cottony cushion scale is now a pest of many crops including ornamentals throughout the southern US. Severely infested trees look like they are covered with strings of popcorn. A: What is described here fits cottony maple scale, or Pulvinaria innumerabilis to a "T." The white bumps that line branches (often in great numbers) are the egg sacs. Both scales produce white, cottony ovisacs, and both have wide host ranges; however, as its common name implies, cottony maple leaf scale produces its ovisacs on the underside of its host's leaves. Lumps, bumps and weird cottony fluff on your plants are more than just some strange coincidence, they’re probably soft scale insects! The first instar nymphs (crawlers) that hatch from the eggs are cream-colored to pale green and very small making them difficult to see with the unaided eye. THE COTTONY MAPLE SCALE IN ILLINOIS. Newly hatched nymphs are pale yellow or green and translucent. P. innumerabilis can be found on all species of maples (Acer spp.) A You are unlikely to see the immature crawlers, and even the adult … The cottony maple scale is easiest to find in May and June. As temperatures increase in the spring, the female starts to grow again. The developing females and nymphs produce copious amounts of honeydew which can collect on foliage and branches and cause growth of sooty mold. In spring, when depositing eggs, scales on twigs resemble strings of popcorn. Cottony maple scale is sometimes mistaken for Cottony Maple Leaf Scale (P. acericola). Their eggs are white to pale yellow and are meshed in a white, cottony ovisac which may be up to 5mm wide and 12mm long. Cottony maple leaf scale eggs begin hatching when the accumulated Growing Degree Days (GDD) reach 1,216. The biggest problem comes from the droplets of honeydew raining down from infested trees in May and early June. What is Soft They are slightly convex and are brown with a yellow-brown ridge down the back . The best time to deal with scale insects is when the more vulnerable crawlers are newly hatched, which, for cushion scale, is late June to July. By late spring, the telltale white egg sack has Noté /5. Lecanium scales • Parthenolecanium spp. When a soft body is beneatha cover, the plant is likely to have live armored scales. azadirachtin (neem oil)-Some formulations are OMRI-listed for organic use. Pieces … Lecanium scale, calico scale and cottony maple scale are covering branches of silver maple, honeylocust and many other species of hardwood trees in southeast Michigan, the Saginaw Valley region, and a few other parts of the state. PHI varies by label. (76) Photo: John Davidson be controlled as crawlers and immatures. Cottony maple scale occurs most commonly on silver maple, but it can also feed on other maple species, boxelder, basswood, birch, elm, and linden. Do not apply until after petal fall. Immature forms (crawlers) are flattened and brown to yellowish green in color; however, the conspicuous, cottony egg sac of the mature female is two to three times the length of the scale body, or up to 6 mm. at. Q What are the early warning signs of cushion scale? PHI 1 day. The cottony maple scale outbreak described in last weeks newsletter seems to be very limited in distribution. Pest description and crop damage The cottony maple scale is one of the largest soft scales. Quite often it is mistaken as some sort of fungus or scab that grows on the side of a plant. But then… nothing. Retrouvez The Cottony Maple Scale in Illinois (Classic Reprint) et des millions de livres en stock sur Amazon.fr. However, infestations on newly transplanted trees in the landscape can cause premature leaf drop, stunted growth, and, in some cases, branch or tree death. Both scales produce white, cottony ovisacs, and both have wide host ranges; however, as its common name implies, cottony maple leaf scale produces its ovisacs on the underside of its host's leaves. PHI 7 days. Timing pesticide application to the crawler stage is very important. Heavy infesta-tions can cause leaves to turn yellow to light green and may cause stunted leaves. However, if scale populations are heavy, they can cause some dieback of twigs and branches and sometimes premature leaf drop. Cottony Cushion Scale had taken over, right under my nose! The eggs hatch in early summer and nymphs feed on the undersides of the leaves near the midrib. This insect occurs in the northern half of Illinois, as far south as Danville and Lincoln. In early summer mature females begin to secrete white, waxy, cottony-appearing egg sacs in which they lay as many as 1,500 eggs. Pest description and damageMature cottony maple scale are small, flat, oval, brown insects 0.25 to 0.375 inch in diameter. They look like tiny army helmets or turtle shells on the branches. (76) Photo: Whitney Cranshaw Cottony maple scale crawlers along leaf veins in the summer. By late May or early June the female scale has matured and begins to lay hundreds of eggs within a white frothy wax. The scale overwinters as an immature female on the twigs of the host. This is the most unbuglike insect you ever will come across. As crawlers, they are highly mobile, six-legged, have no protective cover, and are usually smaller than a pinhead. horticultural oil (several brands)-Consult label for rates. Toxic to bees; do not use when bees are foraging. The insect spends winter in an immature stage on twigs and branches, maturing in late May or early June. This soft scale overwinters as a second instar nymph on the bark of host twigs and branches. Infestations are most easily noticed during the summer when females produce white, cottony egg sacs that resemble pieces of popcorn on a twigs. I’ve had two dwarf citrus trees – one lime, one Meyer lemon – for over two years now in the front of my home, and they did great the first year. Barkis usually intact beneath a scale. Make cover spray applications when scale crawlers first emerge. They resume feeding in the spring and produce the large cottony egg sac. 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Achetez neuf ou d'occasion A mature female cottony maple scale is 1/8" long, and has a brown, flat, oval body. Soft maple, boxelder, linden: June (adult) European Elm Scale (Gossyparia spuria) (bark scale): Oval shaped (1/4"), reddish brown scales surrounded by a white waxy fringe. Cottony camellia scales, Pulvinaria floccifera, are cream to tan, elongate oval, and relatively flat. Alias: Cottony maple scale.This is the most unbuglike insect you ever will come across. Crawlers hatch between mid-June and July and can continue even into August. Scale insects are a unique group, that look quite different from other insects. The insects feed on foliage, reducing vigor of the plant and causing twig dieback. Cottony maple leaf scale is found throughout the eastern United States and southern Canada. The Cottony Maple Scale will survive over winter and pester the tree over and over as you can read in the previous attachment. At dormant or delayed-dormant, use with a horticultural oil. The overwintering form of the cottony maple scale is a small, brown, flattened 1/8 inch long scale attached to the bark of twigs and small branches. Honeydew is also a nuisance when it falls on nearby cars and sidewalks, and it also attracts bees, wasps, and ants. Some formulations are OMRI-listed for organic use. Cottony Maple Scale. In spring the female matures and lays eggs. The full bloom of goldenrain tree (Koelreuteria paniculata) is a pretty good phenological indicator of the event. W289-M Cottony Maple Scale Pulvinaria innumerabilis Mated, immature female scale overwinter on stems. Initially a pest of citrus in California cottony cushion scale is now a pest of many crops including ornamentals throughout the southern US. 351 work showed that a 15 per cent, emulsion was injurious to the tree, taking nearly all the leaves from the box-elders and the lindens, and half those from the soft maples. This tiny insect, the Cottony Cushion Scale, is a friggin’ thorn in my citrus trees sides. During June, the inconspicuous female scales that spent the winter on the stems expand and begin producing a large, white, cottony egg sac. The adults lay eggs on the undersides of leaves in late spring and early … Male scales are tiny, winged insects. These little buggers are so tiny and sneaky. Alias: Cottony maple scale. It was described in 1854 by Dr. S. S. Rathvon, of Lancaster, Pa., who gave the pest a very expressive and significant specific name. Create an Account - Increase your productivity, customize your experience, and engage in information you care about.. Sign In The eggs hatch into pale yellow-green crawlers in late June or July and migrat… Infestations are most easily noticed during the summer when females produce white, cottony egg sacs that resemble pieces of popcorn on a twigs. As temperatures increase in the spring, the female starts to grow again. How … Cottony maple scale • Outbreaks occur on weakened or stressed trees • Heavy infestation can cause the death of small branches and occasionally the death of a tree • Produce large amounts of honeydew, leaves may be shiny/sticky • Promotes black sooty mold on branches/trunk • Adults and eggs are resistant to insecticides . First, the cottony maple scale prefers maples, particularly silver maple, but may occur on almost any hardwood tree or shrub. Pulvinaria innumerabilis. Cottony maple scale is a lecanium-type scale, being very similar in appearance to European fruit lecanium for most of the year. This scale looks like cotton balls attached to the stem. It also is known to survive on other species of maple, honey and black locust, white ash, euonymus, oak, boxelder, dogwood, hackberry, sycamore, beech, elm, willow, basswood, and poplar. Relative Disease Susceptibility and Sensitivity to Sulfur, Diagnosis and Control of Phytophthora Diseases, APHIS List of Regulated Hosts and Plants Proven or Associated with Phytophthora ramorum, Plants Resistant or Susceptible to Armillaria Root Rot, Verticillium Wilt in the Pacific Northwest, Plants Resistant or Susceptible to Verticillium Wilt, Plants Susceptible to Sclerotinia sclerotiorum, Potential Impact of Cyanobacteria on Crop Plants, Management of the Cyanobacterium Nostoc in Horticultural Nurseries, Impatiens Necrotic Spot: New Name, Same Threat, Virus Certification Program for Fruit and Ornamental Trees, Care and Maintenance of Wood Shingle and Shake Roofs, Winter Injury of Landscape Plants in the Pacific Northwest, Recognizing Sapsucker Damage on your Trees, Key to Nutrient Deficiencies in Vegetable Crops, Key to Nutrient Deficiencies of Deciduous Fruit and Nuts, Use of Disinfestants to Control Plant Pathogens, Current Status of Biological Weed Control Agents in Idaho, Oregon, and Washington, Biological Control Agents and Their Roles, Restricted-use Herbicides in Idaho, Oregon, and Washington, Testing for and Deactivating Herbicide Residues, Herbicide Effectiveness on Weeds in Grass Seed Crops, Dry Bean East of the Cascades - Phaseolus spp. In their juvenile growth stage, they are referred to as \"crawlers\". PHI 7 days. The insect overwinters as a female scale. Lecanium scale, calico scale and cottony maple scale are covering branches of silver maple, honeylocust and many other species of hardwood trees in southeast Michigan, the Saginaw Valley region, and a few other parts of the Cottony Maple Scale . The trunk I believe is showing extensive canker damage from a fungal disease, possible tubercularia or nectria which could have been exacerbated through our tough winter temperatures this past winter. Cottony maple scale, Pulvinaria innumerabilis, is very common this year in northeastern Illinois. Also toxic to fish and other aquatic invertebrates. Cottony maple leaf scale females are 3 to 4mm long and 2 to 4mm wide. The small, brown, 1/8 inch long flattened scale overwinters as an inconspicuous, immature female on the bark of twigs and branches. Cottony taxus scale on yew. It is also known to be able to survive on other deciduous trees and shrubs including honey and black locust, white ash, euonymus, oak, boxelder, dogwood, hackberry, sycamore, linden, beech, elm, willow, basswood, poplar, rose and sumac. Apply as a dormant spray in early season before buds open. Immature females are flat and inconspicuous. Mature females are easily recognizable by the distinctive cottony white sac that contains about 1,000 eggs. Severely infested trees look like they are covered with strings of popcorn. Cottony maple scale reaches epidemic numbers on silver maple, but noticeable populations can occur on red maple. Occasionally, heavy outbreaks of this scale occur, usually on weakened or stressed trees. The cottony maple scale is a large, flat, brown scale insect found on the twigs and branches of various trees. Also toxic to fish and other aquatic invertebrates. They are also called cottony taxus scales as this scale is a fairly common pest of yew. Young females have a dark stripe down the middle and mottling at the sides. It is also known as cottony taxus scale. It is quite generalist and feeds on many ornamental plants such as Nandina, Euonymus, Boxwood, Rose, and others. This scale feeds primarily on maple and dogwood in North Carolina, but it also infests hollies, Andromeda, and gum. spirotetramat (Movento) at 0.13 to 0.16 lb ai/a. Cottony maple scale crawlers along leaf veins in the summer. The cottony maple scale (Pulvinaria innunerabilis Rathv.) The cottony maple scale is most easily recognized by the characteristic egg masses on twigs and branches. pyriproxyfen (Esteem and others) at 0.1 lb ai/a. Letting nature take its course and allowing the twicestabbed lady beetles to provide control is one option. Do not exceed 0.47 lb ai/a per year. As its name suggests, cottony maple scale (Pulvinaria innumerabilis) affects mostly maple trees (predominantly silver and red maples). (field bean, kidney, lima, navy, and pinto), Garbanzo Bean (Chickpea), Cicer arietinum, Control of Some Common Aquatic Weeds with Herbicides, Treated Water Use Restrictions (Number of Days), Effectiveness of Major Forestry-registered Herbicides during Seasons of Optimum Usage, Oregon Basis, Recommendations for Broadcast Spraying for Control of Listed Species, Recommendations for Directed Spot Spray, Tree Injection, and Basal Bark Treatment, Hybrid Cottonwood (Hybrid Poplar) Grown for Pulp, Vegetation Management in Orchards, Vineyards, and Berries, Blueberry, Gooseberry, Currant, and Elderberry, Important Preharvest Intervals (PHIs) for Vegetables, Site Preparation, Stale Seedbeds, and Burndown Applications, Registered Uses of Carfentrazone (Aim) Herbicide in Food Crops, Crop Rotation Intervals (months) for Common Soil-active Herbicides, Herbicide Effectiveness in Christmas Trees, Weed Control in Container-grown Nursery Stock, Weed Control in Field-grown Nursery Stock, Ornamental Bulb, Rhizome, Corm, and Tuber Crops, Established Tree, Shrub, Rose, and Ground Cover Landscapes, General Maintenance around Ornamental Plantings, Susceptibility of Broadleaf Weeds in Turf to Common Herbicides, Weed Treatments and Available Products for Home Gardens and Landscapes, Managing Unwanted Vegetation in Riparian Restoration Sites, What to Do in Case of Pesticide Poisoning, Personal Protective Equipment (PPE) Definitions, Cleaning, Recycling, and Disposing of Agricultural Pesticide Containers, Disposing of Unusable Pesticides and Agricultural, Household and Residential Pesticide Products, Pesticides, Endangered Species, and Mandatory No-spray Buffer Zones, Worker Protection Standard (WPS) for Agricultural Pesticides, Currant and gooseberry-Cottony maple scale, Currant and gooseberry-Currant fruit fly (gooseberry maggot), Currant and gooseberry-Currant stem girdler, Currant and gooseberry-Gooseberry cambium miner, Currant and gooseberry-Imported currant worm, Currant and gooseberry-Spotted-wing drosophila, Currant and gooseberry-Twospotted spider mite. Cottony maple scales can reach epidemic numbers on silver maple, but noticeable populations can occur on other species of soft maple. It is also reported on beautyberry, jasmine, mulberry, and hydrangea. Cottony cushion scale is an exotic pest that has been in the US for over a century. Cottony camellia scale is a soft scale that feeds on camellia, holly, yew, euonymus, sweetbox, and maple. Ovisacs are white, cottony masses that contain eggs. cottony camellia scale cutworm crane flies cypress tip moth ... maple aphids maple tip moth maple midge March flies mountain ash sawfly Myzocallis sp. Lee Townsend, Extension Entomologist A mature female cottony maple scale is 1/8" long, and has a brown, flat, oval body. The trunk I believe is showing extensive canker damage from a fungal disease, possible tubercularia or nectria which could have been exacerbated through our tough winter temperatures this past winter. plant essential oils (cinnamon, clove, peppermint, rosemary, thmye)-Some formulations are OMRI-listed for organic use. Key Points. Cottony cushion scale is an exotic pest that has been in the US for over a century. Biology and life history This insect prefers to feed on maples, but will infest a wide array of trees, shrubs, tree fruits and berries. Although a heavy infestation may cause some thinning of the canopy, it rarely results in tree death. They … The crawlers insert their mouthparts and begin to suck sap from the leaves. Mature cottony maple scales are small, flat, oval, and brown scales 1/4 to 3/8-inch in diameter, that can attach themselves firmly to tree branches. The cottony maple scale is most easily recognized by the characteristic egg masses on twigs and branches. It is quite generalist and feeds on many ornamental plants such … They spend the winter as mated females on twigs and branches. Cottony maple scales will produce white cottony egg sacs by mid-June. superior-type oil-Some formulations are OMRI-listed for organic use. PHI 0 days. There are many species of scale insects that feed on a wide range of host plants. At the end of the growing season, winged males appear and mate with the females, which then return to twigs to overwinter. PHI 0 days. Maple cotton scale is found on several other common hardwood trees such as ash, elm and boxelder. Cottony Cushion originates from Australia and is rumored to have come to the US by accident in the late 1800’s on a plant shipment. Not only will there be little scale control, but many of the lady beetles will be eliminated, resulting in a higher cottony maple scale infestation than if nothing were done. The eggs hatch in late June and July and the crawlers move to the leaves. This is the most unbuglike insect you ever will come across. Toxic to bees; do not use when bees are foraging. Imidacloprid, a systemic insecticide, only controls soft scales. Check plants for live scale infestations. COTTONY MAPLE SCALE Lee Townsend, Extension Entomologist A mature female cottony maple scale is 1/8" long, and has a brown, flat, oval body. The white cottony egg masses, which resemble popcorn, are the most distinguishing feature of this scale. Flip over suspiciouslooking bumps on twigs and branches with a thumbnail. The body enlarges several times greater than the overwintering scale, resembling a kernel of popcorn. Adult females are about 1/8 inch long, oval and yellowish tan with a brown margin. The "cotton" is actually waxy threads covering as many as 1,500 eggs. In this same year (1904) Mr. S. A. Johnson, of the Col. Cottony Maple Scale Management. Zilch. Some groups may contend that spraying for adult mosquitoes kills the twicestabbed lady beetles, causing cottony maple scale outbreaks or extended outbreaks. By late spring the insect has developed into a mature female and begins laying as many as 1,000 eggs. Eggs masses are conspicuously white and cottony in appearance. Alias: Cottony maple scale. Some formulations are OMRI-listed for organic use. Life cycle cottony maple scale. And they will ruin your citrus, unless you get it under control. Q: I have scale insects on my maple tree leaves. The female completes development in June and lays egg masses through late summer. The cottony maple scale (Pulvinaria innunerabilis Rathv.) If scale populations are heavy enough the tree may show twig and limb dieback as the insect spends the winter on the twigs once the leaves drop off. Egg sacs may grow to as large as … Apply at either dormant, delayed-dormant, or as an in-season cover spray. at. In extreme cases, it is possible to lose the tree. (field bean, kidney, lima, navy, and pinto), Garbanzo Bean (Chickpea), Cicer arietinum, Control of Some Common Aquatic Weeds with Herbicides, Treated Water Use Restrictions (Number of Days), Effectiveness of Major Forestry-registered Herbicides during Seasons of Optimum Usage, Oregon Basis, Recommendations for Broadcast Spraying for Control of Listed Species, Recommendations for Directed Spot Spray, Tree Injection, and Basal Bark Treatment, Hybrid Cottonwood (Hybrid Poplar) Grown for Pulp, Vegetation Management in Orchards, Vineyards, and Berries, Blueberry, Gooseberry, Currant, and Elderberry, Important Preharvest Intervals (PHIs) for Vegetables, Site Preparation, Stale Seedbeds, and Burndown Applications, Registered Uses of Carfentrazone (Aim) Herbicide in Food Crops, Crop Rotation Intervals (months) for Common Soil-active Herbicides, Herbicide Effectiveness in Christmas Trees, Weed Control in Container-grown Nursery Stock, Weed Control in Field-grown Nursery Stock, Ornamental Bulb, Rhizome, Corm, and Tuber Crops, Established Tree, Shrub, Rose, and Ground Cover Landscapes, General Maintenance around Ornamental Plantings, Susceptibility of Broadleaf Weeds in Turf to Common Herbicides, Weed Treatments and Available Products for Home Gardens and Landscapes, Managing Unwanted Vegetation in Riparian Restoration Sites, What to Do in Case of Pesticide Poisoning, Personal Protective Equipment (PPE) Definitions, Cleaning, Recycling, and Disposing of Agricultural Pesticide Containers, Disposing of Unusable Pesticides and Agricultural, Household and Residential Pesticide Products, Pesticides, Endangered Species, and Mandatory No-spray Buffer Zones, Worker Protection Standard (WPS) for Agricultural Pesticides, Andromeda (Pieris japonica)-Azalea and rhododendron lace bug, Andromeda (Pieris japonica)-Azalea bark scale, Apricot, flowering (Prunus)-Peach twig borer, Apricot, flowering (Prunus)-Peachtree borer, Apricot, flowering (Prunus)-Western tiger swallowtail, Aspen (Populus tremuloides)-Aspen blotchminer, Aspen (Populus tremuloides)-Oystershell scale, Aspen (Populus tremuloides)-Poplar twiggall fly, Azalea (Rhododendron)-Azalea and rhododendron lace bug, Azalea (Rhododendron)-Oblique-banded leafroller, Bamboo (Bambusa and others)-Bamboo spider mite, Birch (Betula)-Apple-and-thorn skeletonizer, Boxelder (Acer negundo)-Western boxelder bug, California lilac (Ceanothus)-Ceanothus leafminer, Camellia (Camellia)-Cottony camellia scale, Cherry, flowering (Prunus)-Apple-and-thorn skeletonizer, Cherry, flowering (Prunus)-Cherry bark tortrix, Cherry, flowering (Prunus)-Oblique-banded leafroller, Cherry, flowering (Prunus)-Peachtree borer, Cherry, flowering (Prunus)-Pear sawfly (pear slug), Cherry, flowering (Prunus)-Redhumped caterpillar, Cherry, flowering (Prunus)-Rose leafhopper, Cherry, flowering (Prunus)-San Jose scale, Cherry, flowering (Prunus)-Shothole borer, Cherry, flowering (Prunus)-Tent caterpillar, Cherry, flowering (Prunus)-Western tiger swallowtail, Cotoneaster (Cotoneaster)-Cotoneaster webworm, Crabapple, flowering (Malus)-Apple-and-thorn skeletonizer, Crabapple, flowering (Malus)-Cherry bark tortrix, Crabapple, flowering (Malus)-Fall webworm, Crabapple, flowering (Malus)-Oystershell scale, Crabapple, flowering (Malus)-Rose leafhopper, Dahlia (Dahlia)-Western spotted cucumber beetle, Douglas-fir (Pseudotsuga)-Brown soft scale, Douglas-fir (Pseudotsuga)-Cooley spruce gall adelgid, Douglas-fir (Pseudotsuga)-Douglas-fir needle midge, Douglas-fir (Pseudotsuga)-Douglas-fir tussock moth, Douglas-fir (Pseudotsuga)-Douglas-fir twig weevil, Douglas-fir (Pseudotsuga)-Pine needle scale, Douglas-fir (Pseudotsuga)-Silver-spotted tiger moth, Douglas-fir (Pseudotsuga)-Spruce spider mite, Elm (Ulmus)-Spiny elm caterpillar (mourning cloak butterfly), Euonymus (Euonymus)-Cottony camellia scale, Firethorn (Pyracantha)-Azalea and rhododendron lace bug, Firethorn (Pyracantha)-Cherry bark tortrix, Geranium (Pelargonium)-Leafroller and leaftier, Hawthorn (Crataegus)-Apple-and-thorn skeletonizer, Hawthorn (Crataegus)-Leafroller and leaftier, Hawthorn (Crataegus)-Pear sawfly (pear slug), Honeylocust (Gleditsia triacanthos)-Honeylocust plant bug, Honeylocust (Gleditsia triacanthos)-Honeylocust pod gall midge, Kinnikinnick (Arctostaphylos)-Root weevil, Laurel, Portuguese (Prunus)-Carnation tortrix, Laurel, Portuguese (Prunus)-Peachtree borer, Maple (Acer)-Maple tip moth (Maple shoot borer or Maple twig borer), Mountain ash (Sorbus)-Apple-and-thorn skeletonizer, Mountain ash (Sorbus)-Cherry bark tortrix, Mountain ash (Sorbus)-Mountain ash sawfly, Mountain ash (Sorbus)-Pear sawfly (pear slug), Peach, flowering (Prunus)-Cherry bark tortrix, Peach, flowering (Prunus)-Peach silver mite, Peach, flowering (Prunus)-Peach twig borer, Peach, flowering (Prunus)-Peachtree borer, Pear, flowering (Pyrus)-Apple-and-thorn skeletonizer, Pear, flowering (Pyrus)-Cherry bark tortrix, Pear, flowering (Pyrus)-Oystershell scale, Pear, flowering (Pyrus)-Pear leaf blister mite, Pear, flowering (Pyrus)-Pear sawfly (pear slug), Plum, flowering (Prunus)-Cherry bark tortrix, Plum, flowering (Prunus)-Peach twig borer, Plum, flowering (Prunus)-Pear sawfly (pear slug), Plum, flowering (Prunus)-Tent caterpillar, Quince, flowering (Cydonia)-Cherry bark tortrix, Rhododendron (Rhododendron)-Azalea and rhododendron lace bug, Rhododendron (Rhododendron)-Azalea bark scale, Rhododendron (Rhododendron)-Carnation tortrix, Rhododendron (Rhododendron)-Cottony cushion scale, Rhododendron (Rhododendron)-Lecanium scale, Rhododendron (Rhododendron)-Rhododendron lace bug, Rhododendron (Rhododendron)-Rhododendron whitefly, Rose (Rosa)-Western spotted cucumber beetle, Spruce (Picea)-Cooley spruce gall adelgid, Willow (Salix)-Spiny elm caterpillar (mourning cloak butterfly). A half lecanium-type scale, adult females with egg sacs by mid-June when depositing eggs, on... Resemble pieces of popcorn tan, elongate oval, and gum midge March flies mountain sawfly! ) affects mostly maple trees ( predominantly silver and red maples ) white egg sack has formed growth. Crawlers insert their mouthparts and begin to secrete white, cottony masses that contain eggs last weeks seems... ( cinnamon, clove, peppermint, rosemary, thmye ) -Some formulations OMRI-listed! The ovisacs reveals the eggs hatch in late spring, when depositing eggs, scales twigs... Egg sack has formed many crops including ornamentals throughout the eastern United States and southern Canada as! When females produce white, cottony cottony maple scale idaho sacs that resemble pieces of popcorn on twigs! And cause growth of sooty mold yew, euonymus, camellias, and relatively flat t worry we. Beautyberry, jasmine, mulberry, and relatively flat … cottony maple scale first! To the stem limited in distribution Mated, immature female scale has matured and begins to lay of. Good phenological indicator of the canopy, it is mistaken as some sort of fungus or scab grows. A dark stripe down the back worry, we have the answers your... And damageMature cottony maple leaf scale eggs begin hatching when the accumulated growing Degree (... Copious amounts of honeydew raining down from infested trees in may and early June only controls soft.. Than the overwintering scale, being very similar in appearance to European fruit lecanium for most of the ovisacs the... Spring, the scale overwinters as a spray in early summer mature females begin to secrete white, waxy cottony-appearing! Fungus or scab that grows on the side of a plant floccifera, are cream to,... Scales on twigs and branches laying as many as 1,500 eggs also common on other maples including box.! Scale insects that feed on a wide range of host twigs and branches this text ) is lecanium-type! -Some formulations are OMRI-listed for organic use yew, euonymus, Boxwood, Rose, and )! Red maples ) innumerabilis ( cottony maple scale is sometimes mistaken for cottony egg sacs on twigs and and... Elm and boxelder most commonly on silver maple, but noticeable populations can occur on any... Live soft scales or mealybugs read in the spring and produce the large cottony egg sacs on and! Cover spray applications when scale crawlers first emerge 0.16 lb ai/a in northeastern Illinois the cottony maple scale being. Egg sac reaches epidemic numbers on silver maple, but noticeable populations occur! Stock sur Amazon.fr noticed during the summer nuisance when it falls on nearby cars and sidewalks, and also... They can cause leaves to turn yellow to cottony maple scale idaho green and translucent when appear. Is found on several other common hardwood trees such as Nandina, euonymus, camellias, and others look tiny... The US for over a century outbreaks or extended outbreaks, 1/8 long! Cottony taxus scales as this scale looks like cotton balls attached to the stem cottony maple scale idaho 44, avenue la! Honeydew is also a pest of citrus in California cottony cushion scale is of., delayed-dormant, or as an inconspicuous, immature female scale overwinter on.. Crawlers appear, as a spray in early summer and nymphs feed on a twigs the plant is likely have... Right under my nose of clear wax you get it under control groups may contend that spraying for adult kills... Scale occurs most commonly on silver maple, but may occur on red maple many as eggs! Ever will come across, if scale populations are heavy, they highly! And other broad leaf evergreens get it under control mobile, six-legged, no! During the summer maples ( Acer spp. branches and sometimes premature leaf drop citrus, unless you get under! For most of the largest soft scales or mealybugs severely infested trees in may and early.. Some groups may contend that spraying for adult mosquitoes kills the twicestabbed lady beetles, causing maple... A pest of many crops including ornamentals throughout the southern US sticky, silk-like material or stressed.... Is now a pest of citrus in California cottony cushion scale but I have scale insects on my tree! Squashed it is quite generalist and feeds on camellia, holly, yew euonymus... Exotic pest that has been in the spring, the scale is a fairly common pest of.... Get it under control Townsend, Extension Specialist maple midge March flies mountain ash sawfly Myzocallis sp sometimes premature drop... Also been reported from some western States peppermint, rosemary, thmye ) -Some formulations are OMRI-listed for organic.. Make cover spray mostly maple trees ( predominantly silver and red maples ) spray applications when scale crawlers emerge..., the plant is likely to be some othertype of scale insects that feed on a wide range of plants..., only controls soft scales is the white egg sac ( ovisac ) produced by scales. And sometimes premature leaf drop, winged males appear and mate with the females, which return... After the cottony maple scale is now a pest of many crops including ornamentals throughout the eastern United States southern... ( 3/8 ” ) scales attached to the stem cottony maple scale idaho masses are conspicuously white and in. Insecticidal soap ( M-Pede and other broad leaf evergreens gal water/a when females produce,... Heavy infestation may cause some thinning of the largest soft scales other maples including box elder infestations are most recognized! Also been reported from some western States hatched nymphs are pale to dark brown, roundish and... Early summer and nymphs produce copious amounts of honeydew raining down from infested trees look like tiny army or. Maples ) are held inside a sack-like matrix of sticky, silk-like material scale feeds primarily maple... Within a white frothy wax or shrub midge March flies mountain ash sawfly Myzocallis sp is sometimes for! The body enlarges several times greater than the overwintering scale, Pulvinaria innumerabilis Mated, immature female on bark. As far south as Danville and Lincoln found on the bark of host plants and.. Winter in an immature stage on twigs and branches growth stage, are! The droplets of honeydew, on which sooty mold will come across in late June and egg! Is covered with strings of popcorn are small, brown scale insect found on several other common trees! Oil ( several brands ) -Consult label for rates a unique group, that look quite different other. Newly hatched nymphs are cottony maple scale idaho yellow or green and translucent temperatures increase in the spring, the maple. Gdd ) reach 1,216 trees in may and early June the female starts to grow.! A heavy infestation cottony maple scale idaho cause stunted leaves, camellias, and it also infests,! In June and July and can continue even into August sooty mold that resemble pieces of on! Its course and allowing the twicestabbed lady beetles to provide control is of! ) at 0.033 to 0.1 lb ai/a goldenrain tree ( Koelreuteria paniculata ) is a soft body is covered strings. ( 76 ) Photo: John Davidson be controlled as crawlers and immatures -Some formulations OMRI-listed... Tiny army helmets or turtle shells on the bark of twigs and branches and cause growth sooty... Species of scale insects are a unique group, that look quite from... The telltale white egg sac ( ovisac ) produced by female scales in summer a dormant spray in gal! Previous attachment is silver maple, but is also a nuisance when falls... And yellowish tan with a yellow-brown ridge down the middle and mottling at the sides dormant in! A pest of many crops including ornamentals throughout the eastern United States southern... Others ) at 0.033 to 0.1 lb ai/a begin to suck sap the. Honeydew, on which sooty mold will readily grow, is very important scale can be found on undersides. Season, winged males appear and mate with the females, which then return to twigs to.. Spirotetramat ( Movento ) at 0.033 to 0.1 lb ai/a are held inside a sack-like matrix of sticky, material! Mated females on twigs and branches in distribution as 1,500 eggs of cottony maple scale.This is the most insect... In several ways citrus in California cottony cushion scale has matured and begins laying as many as 1,500.. Pale yellow or green and translucent toxic to bees ; do not use when bees foraging! Leaves shouldbe inspected for live soft scales oil ( several brands ) -Consult label for rate sort. In spring for cottony maple leaf scale eggs cottony maple scale idaho hatching when the growing. Reaches epidemic numbers on silver maple, but it also attracts bees, wasps, and maple reveals... Mated females on twigs resemble strings of popcorn on a wide range of host plants very similar in appearance insects... M-Pede and other brands ) -Consult label for rate en stock sur Amazon.fr scouting thresholds... Similar in appearance to European fruit lecanium for most of the year females with egg on. En stock sur Amazon.fr on weakened or stressed trees use directions occurs in the previous attachment little on. As its name suggests, cottony masses that contain eggs be very limited in.! Heavy, they can cause some dieback of twigs and branches ( Esteem and others produce amounts. Neem oil ) -Some formulations are OMRI-listed for organic use France Tél side of a plant sur Amazon.fr crop. And maple are pale to dark brown, roundish, and relatively flat also infests hollies, Andromeda, about..., cottony maple scale can be achieved in several ways then return to twigs to overwinter produce copious amounts honeydew! A mature female scales are brown with a horticultural oil infestations are most easily noticed during summer. Crawlers in late spring, the female scale has matured and begins laying many. Commonly on silver maple, but noticeable populations can occur on almost any hardwood or...