japanese cottony maple scale

The use of some products may not be legal in your state or country. Departments & Units   /   Applications must target newly hatched scale crawlers which are active in June and July. Infestations are most easily noticed during the summer when females produce white, cottony egg sacs that resemble pieces of popcorn on a twigs. The multiple trunks are muscular-looking, picturesque, grey and show nicely when lit up at night. However, over-fertilization favors scale buildup. Japanese maple has a height and spread of about 20 feet, but there are much smaller selections available (Fig. The cottony white egg sacs of this soft scale appear on undersides of leaves (Figure 1) in May and egg hatch (Figure 2) occurs during June. Of course, ALWAYS READ AND FOLLOW LABEL DIRECTIONS FOR SAFE USE OF ANY PESTICIDE! Please check with your local county agent or regulatory official before using any pesticide mentioned in this publication. Just before leaf drop, the small insects will move back to twigs and branches to spend the winter. Figure 7. In landscape and forested settings, Japanese maple can incur scale insect damage, particularly from cottony maple scale. Scales tend to thrive on stressed plants. You can conserve natural enemies by using insecticidal soaps and oils which have limited impact on beneficial species in comparison to other control alternatives. Japanese maple scale ( Lopholeucaspis japonica) is a challenging scale to manage. The body is covered with flakes of clear wax. Eggs masses are conspicuously white and cottony in appearance. Identify cottony maple scale (Pulvinaria innumerabilis), the most common scale insect species to infest maple trees, by their adult female scales with cotton-like egg sacks on their hind ends. The small, brown, 1/8 inch long flattened scale overwinters as an inconspicuous, immature female on the bark of twigs and branches. Description 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. The insect forms a cottony mass on the lower sides of branches. ... Perhaps the most common is cottony maple scale. In early summer mature females begin to secrete white, waxy, cottony-appearing egg sacs in which they lay as many as 1,500 eggs. Sooty mold and shiny leaves should gradually disappear from plants that were infested with soft scales. Painted maple aphid ; Armored scales . There is one generation each year. Infestations are most easily noticed during the summer when females produce white, cottony egg sacs that resemble pieces of popcorn on a twigs. Pest description and crop damage The cottony maple scale is one of the largest soft scales. If practical, improve plant sites to reduce stress and promote growth. Proper timing of insecticide applications is a major key to success. Cottony maple scales commonly infest silver maple but can feed on several species including other maples, boxelder, basswood, birch, elm, and linden. 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. Large amounts of … Mature females are pale to dark brown, convex, and about 3-6 mm long (Fig. Once settled on the plant, they begin to secrete a covering and are protected by it. However, in large numbers they can cause premature leaf drop and twig dieback. In their juvenile growth stage, they are referred to as \"crawlers\". Residential Recommendation Skip to Residential Recommendation. Severely infested trees look like they are covered with strings of popcorn. A mature female cottony maple scale is 1/8" long, and has a brown, flat, oval body. Severely prune back heavily infested branches and protect new growth with insecticide applications. Wax Scales (Japanese, Florida, or Indian wax scale) Ceroplastes spp. They spend the winter in an immature stage on twigs or branches and complete development in June when the egg sacs appear. Dr. Subba Reddy PalliDepartment Chair & State EntomologistS-225 Agricultural Science Center NorthLexington, KY 40546-0091859.257.7450entchair@uky.edu, UK Entomology: Vision, Mission, & Core Values, Nancy Cox, Ph.D. ... Cottony maple scale; Spider mites . Pesticide recommendations in this publication are registered for use in Kentucky, USA ONLY! (76) Photo: John Davidson be controlled as crawlers and immatures. 1). Digital Media Library, Images: University of Kentucky Entomology, College of Agriculture, Food and Environment. ... such as Japanese maple, so check the label for information about the plant species that you intend to treat. Dean Crawlers settle on… Inappropriate timing is not only ineffective, but Lexington, KY 40546-0091 Heavy infestations can cause leaves to turn yellow to light green and may cause stunted leaf growth. Scale insects are a unique group, that look quite different from other insects. Pests and disorders of Acer spp. Imidacloprid (Bayer Advanced Garden Tree & Shrub Insect Control Concentrate) is applied as a drench around the root zone of infested plants. While the residual life of these products is generally longer than oils and soaps, timing, coverage, and precautions on damage to some plant species are very similar to those for oils and soaps. P. innumerabilis can be found on all species of maples (Acer spp.) Pulvinaria innumerabilis (cottony maple scale) is a small, flattened, brown scale insect about 1/8" long. Like horticultural oils, they require thorough coverage. Highly refined supreme, superior, or summer oils can be used on many trees and shrubs during the growing season. Research   /   1). Immature females are flat and inconspicuous. Male scales are tiny, winged insects. COTTONY MAPLE SCALE is an insect pest of maples, especially silver maples and locust trees primarily, but also will infest several other species. Mature cottony cushion scale females on bark. Scales are usually controlled with horticultural oil sprays. The insects feed on foliage, reducing vigor of the plant and causing twig dieback. The cottony camellia scale is most commonly reported on holly in Kentucky, but it is also found on other hosts, including yew, euonymous, maple, and hydrangea. 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. Japanese maple scales small size, ability to blend in, and long crawler emergence period make it difficult to control. (76) Photo: Whitney Cranshaw Cottony maple scale crawlers along leaf veins in the summer. However, at maturity, scale insects are immobile, have no visible legs or antennae, and in the case … Oleander scale; Oystershell scale; San Jose scale; Carpenterworm; Eriophyid mites; Flatheaded borers. https://en.wikipedia.org/w/index.php?title=Pulvinaria_innumerabilis&oldid=891399079, Creative Commons Attribution-ShareAlike License, This page was last edited on 7 April 2019, at 18:27. Japanese maple. They are black, flat, and oval. ... Chinese holly and jasmine although it can infest English ivy, euonymous, hydrangea, maple, mulberry, pittosporum, and rhododendron. The cottony maple scale ( Pulvinaria innumerabilis) is one of the largest and most conspicuous scale insects in this country. Well-timed applications can eradicate the scale larvae. At that time, the twice-stabbed lady beetle adults will be under loose bark and not harmed by the spray. The cottony maple scale (Pulvinaria innumerabilis) is one of the largest and most conspicuous scale insects in this country. Invertebrates. Following a recommended fertility program and watering regime will promote plant health. The body of the scale is white and resembles a kernel of popcorn. This water soluble insecticide is taken up by the roots and transported throughout the plant where it is ingested by sap feeding insects. The distinguishing characteristic of these soft scales is the white egg sac (ovisac) produced by female scales in summer. In early summer mature females begin to secrete white, waxy, cottony-appearing egg sacs in which they lay as many as 1,500 eggs. This scale primarily attacks azalea and rhododendron but has also been found on andromeda, maple, arborvitae, willow, poplar, and hackberry. While conspicuous, P. innumerabilis infestations usually have little impact on established trees. 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