The cottony maple scale is most easily recognized by the characteristic egg masses on twigs and branches. Cottony taxus scale is most commonly found on yews and hollies in this area. 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. Male scales are tiny, winged insects. The insect tends to populate the undersides of leaves/needles. Appearance: The most noticeable stage is the brown adult female with a large cottony mass (egg sack) protruding from the rear. The cottony maple leaf scale is so named because the females exude their eggs in an elongated, white, cottony structure called an ovisac which are stuck onto the underside of leaves. The cottony mass resembles popcorn and, if the population is high, the ‘kernels’ will line up along the branches and twigs. Mature cottony maple scales are small, flat, oval, brown insects without obvious legs, antennae or wings. REC, Lower Eastern Shore The most common scale insects that infest maple trees are the armored varieties oystershell scale and scurfy scale, as well as the soft varieties cottony maple scale and lecanium scale. Following a recommended fertility program and watering regime will promote plant health. Each mass usually contains 1,000-1,500 eggs. However, in some years, the scale population increases above “normal” and becomes large enough to get noticed. with its southern boundary being at or slightly north of I-72. Cottony maple scale reaches epidemic numbers on silver maple, but noticeable populations can occur on red maple. The cottony maple scale is a large, flat, brown scale insect found on the twigs and branches of various trees. These little buggers are so tiny and sneaky. They secrete the white, cottony masses beneath which, they lay 500 or more eggs in late May to early June. Its cottony egg sac and profuse honeydew production make cottony cushion scale easy to spot in the landscape. Cottony maple scale is a lecanium-type scale, being very similar in appearance to European fruit lecanium for most of the year. Pulvinaria innumerabilisThe cottony maple scale (Pulvinaria innumerabilis) is one of the largest and most conspicuous scale insects in this country. If practical, improve plant sites to reduce stress and promote growth. Cottony maple scale occurs most commonly on silver maple, but it can also feed on other maple species, boxelder, basswood, birch, elm, and linden. Pulvinaria innumerabilis (cottony maple scale) is a small, flattened, brown scale insect about 1/8" long. Severely infested trees look like they are covered with strings of popcorn. They spend the winter in an immature stage on twigs or branches and complete development in June when the egg sacs appear. It is also reported on beautyberry, jasmine, mulberry, and hydrangea. Damage to the host tree is caused when heavy populations of cottony maple scale withdraw sap from the plant, resulting in branch and twig dieback. Cottony maple scales will produce white cottony egg sacs by mid-June. Pulvinaria innumerabilis. Cottony maple leaf scale females are 3 to 4mm long and 2 to 4mm wide. Cottony Maple Scale Characteristics. Crawlers settle on… Consequently, they may not be effective where several l… The twice-stabbed ladybeetle, which feeds on soft-bodied insects, is commonly found dining on cottony maple scale crawlers. These little buggers are so tiny and sneaky. Cottony Maple Leaf Scale is one of several cottony scales in the genus Pulvinaria. The biggest problem is the honeydew dripping down on decks, picnic tables, lawn chairs and parked cars. Egg sacs of cottony maple scale. Honeydew often drops onto leaves or plants below. Frequently, feeding results in the secretion of a clear sticky substance called honeydew. Cottony maple scale is a food source for many predaceous insects and parasites. It looks like a Cottony Maple Scale (Pulvinaria innumerabilis) (the BugLady loves that species name), or something closely related to it. COTTONY MAPLE SCALE Lee Townsend, Extension Entomologist A mature female cottony maple scale is 1/8" long, and has a brown, flat, oval body. Its cottony egg sac and profuse honeydew production make cottony cushion scale easy to spot in the landscape. These scales also produce large amounts of liquid waste The cottony maple scale is a large, flat, brown scale insect found on the twigs and branches of various trees. I say obvious because there was definitely something that wasn’t right with the plant. They lay white cottony ovisacs (egg masses) on the. Cottony maple scale crawlers along leaf veins in the summer. If abundant, a sooty mold fungus may colonize the honeydew, resulting in a black sooty appearance on the leaves, twigs, and branches. Central Maryland In early summer mature females begin to secrete white, waxy, cottony-appearing egg sacs in which they lay as many as 1,500 eggs. Cottony maple scale on a silver maple. Leaves may turn yellow and drop prematurely. Although a heavy infestation may cause some thinning of the canopy, it rarely results in tree death. Cottony maple scale over-winters as immature females (nymphs) on twigs and branches. However, in large numbers they can cause premature leaf drop and twig dieback. In extreme conditions, a tree may be killed. Cottony Scales include Cottony Camellia Scale (Hollies and verious other plants), Cottony Taxus Scale (Yews), Cottony Maple Scales (Silver Maple, Dogwood and others) and Azalea Bark Scale (Azalea, Andromeda and Rhododendron). Scales tend to thrive on stressed plants. This is best applied when the scale are in their younger nymph stages, so make sure to regularly check your landscape for pests. The females mature when the plant resumes growth in the spring. Hosts: Maples (especially silver), honeylocust, linden and other hardwoods. Pulvinaria innumerabilisThe cottony maple scale (Pulvinaria innumerabilis) is one of the largest and most conspicuous scale insects in this country. A favored host is silver maple, but it will attack other species of maple as well. Cottony Scales include Cottony Camellia Scale (Hollies and verious other plants), Cottony Taxus Scale (Yews), Cottony Maple Scales (Silver Maple, Dogwood and others) and Azalea Bark Scale (Azalea, Andromeda and Rhododendron). Imidacloprid, a systemic insecticide, only controls soft scales. Eggs masses are conspicuously white and cottony in appearance. Cottony maple scale occurs most commonly on silver maple, but is also common on other maples including box elder. Cottony maple scale definition is - a brown oval soft scale (Pulvinaria innumerabilis) that in summer becomes covered with a white cottony secretion beneath which its eggs are laid, that is widespread in North America, and that attacks and often kills various native and cultivated trees and shrubs. Pulvinaria innumerabilis. Adult females are about 1/8 inch long, oval and yellowish tan with a brown margin. They become active and feed on the leaves between June and July. The insect spends winter in an immature stage on twigs and branches, maturing in late May or early June. The scales grow to adulthood on the leaves and mate in August or September before the females return to the twigs to spend the winter. Cottony camellia scale is a soft scale that feeds on camellia, holly, yew, euonymus, sweetbox, and maple. A close examination of the ovisacs reveals the eggs are held inside a sack-like matrix of sticky, silk-like material. Cottony Maple Scale (Pulvinaria innumerabilis) is a soft scale insect pest that commonly attacks maple trees, but can be found on a variety on hosts.Usually it is just a nuisance, but in very severe infestations, it can kill weakened trees or branches on otherwise healthy trees. Cottony maple scale is sometimes mistaken for Cottony Maple Leaf Scale (P. acericola). The "cotton" is actually a waxy secretion enveloping the ovisac, which may contain over 1,500 eggs. Pulvinaria innumerabilis (cottony maple scale) is a small, flattened, brown scale insect about 1/8" long. The scale is called maple cotton scale, Pulvinaria innumerabilis whereas cottony cushion scale is Icerya purchasi, which I am sure clears that up completely for you doesn’t it? 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. 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cottony maple scale

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