![]() Of its host, it greatly prefers red maple. The Asian longhorned beetle (ALB Anoplophora glabripennis) is an invasive insect pest that devastates a variety of tree species, including maples, birch, poplar, ash, and other hardwoods. More information about spring cankerworms and fall cankerworms is available from NC State Extension.Īsian Longhorned Beetle Skip to Asian Longhorned Beetle In severe infestations, municipalities may spray large areas. Management strategies may include banding the trees with sticky material to intercept female trunk ascension and applications of pesticides. ![]() Females are flightless and must crawl up the tree truck to lay eggs, a behavior that is taken advantage of for management purposes. Depending on the age of the caterpillar, they can be green with pale stripes or green with dark stripes. The caterpillars are sometimes called “inchworms” since they have a gap between their two sets of legs that gives them the appearance of “inching” as they crawl. In the spring, the eggs of both species hatch and young caterpillars skeletonize the leaves, often leaving only the midrib. The female insects emerge in the spring (spring cankerworm) or fall (fall cankerworm) and lay eggs on the twigs in clusters. ![]() Spring cankerworms ( Paleacrita vernata) and fall cankerworms ( Alsophila pometaria) are abundant defoliators of many species of hardwood trees, including maple, oak, beech, elm, ash, dogwood, and cherry. More information about the greenstriped mapleworm is available from NC State Extension. Management strategies may include cultural control or narrow-spectrum pesticides. They will lay yellow eggs on leaf undersides, prompting the next generation to grow. The moth, also known as the rosy maple moth, is yellow with pink and yellow wings. In late spring, the adult moth will emerge from its pupa. They have black spikes on each side of their bodies, and two horn-like projections on the second thoracic segment. The greenstriped mapleworm has a bright red to black head and a yellow-green body with seven green stripes that run from the head to the abdomen. Consecutive defoliation events year after year can result in stunted growth and dieback. Each mapleworm is capable of consuming several leaves, resulting in major defoliation when infestations are large. They feed in early summer, from May to June in North Carolina. The greenstriped mapleworm ( Dryocampa rubicunda) is a defoliator of maples and sometimes oaks in close proximity to maples. Greenstriped Mapleworm Skip to Greenstriped Mapleworm More information about gloomy scale can be found from NC State Cooperative Extension. Chemical or biological control may be recommended for large infestations. Management strategies include cultural controls such as choosing proper planting sites and reducing tree stress. In large infestations, the scales give the tree a bumpy appearance due to the crowding of insects on the bark. Underneath this covering, the individual insect is pale pink and circular in shape. The cover is ~2mm wide and tends to blend in with the bark. These scale insects are armored, meaning they have a shield-like cover over them which can be separated from their bodies. The trees might also experience damage from scale saliva inserted during feeding. ![]() The insects use their piercing mouthparts to feed on storage cells under the tree bark, which can cause stunted growth, twig dieback, and thinning in large infestations. Gloomy scale ( Melanaspis tenebricosa) is a pest of soft maples, especially red and silver maples, but it can also impact other maples, such as boxelder and sugar maple. ![]()
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