However, their feeding habits in the caterpillar stage can leave the plants or trees they’re feeding on bare, impacting the overall aesthetic. The rosy maple moth is not considered to be a destructive pest. The female moths can lay anywhere between 10-30 eggs, which evolve into a cluster of caterpillars that like to feed on the host plant they’ve found themselves on. The rosy maple moth can be found throughout North America and has been spotted as far west as Texas, as far south as Florida, and as far north as Canada. Furthermore, they have reddish-pink antennae that are furry and look like feathers. While shades can vary, most rosy maple moths are vibrant shades of yellow and pink. Their body texture is fuzzy, but their coloring is a work of art. Cooperative Extension prohibits discrimination and harassment regardless of age, color, disability, family and marital status, gender identity, national origin, political beliefs, race, religion, sex (including pregnancy), sexual orientation and veteran status.The rosy maple moth ( Dryocampa rubicunda) is a flying insect that you can probably see coming from a mile away, which is surprising considering they’re usually no more than 2-3 inches in size. Be sure to obtain current information about usage regulations and examine a current product label before applying any chemical. Individuals who use agricultural chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. A&T State University nor discrimination against similar products or services not mentioned. The use of brand names and any mention or listing of commercial products or services in this publication does not imply endorsement by NC State University or N.C. Recommendations for the use of agricultural chemicals are included in this publication as a convenience to the reader. See complete list of labeled insecticides in the North Carolina Agricultural Chemicals Manual. Broad-spectrum insecticides like pyrethroids and acephate are not recommended because they will also kill beneficial insects. Bacillus thuringiensis (bt) and spinosad are also among the insecticides for caterpillar control with low impact on non-target organisms. If chemical control is necessary, Chlorantraniliprole (Acelepryn) can provide effective foliar and systemic control while having a relatively low impact on non-target organisms. Other predators such as birds may also provide some biological control. Studies have shown that less than 10% of larvae will be parasitized in natural populations. The greenstriped mapleworm has several natural enemies but none have been recorded in great abundance. Since the caterpillars feed in groups, often a single branch is infested that can be pruned. If clusters of yellow eggs are found, scrape them off or remove the entire leaf to reduce the caterpillar population. However, excessive fertilizer may increase pest abundance by making trees more nutritious to pests and reducing the trees’ natural defenses. Reducing plant stress by proper planting and watering may reduce susceptibility to pest infestations. Intervention Skip to Intervention Cultural Control This type of defoliation can seriously weaken maples to the point that borers and fungi may infest the trees and finish them off. Older literature refers to episodes in which the first generation strips maples bare, and then just as a new flush of growth emerges, the second generation emerges to defoliate the trees again. Rarely will the tree suffer long term damage but loss in growth and branch dieback may occur if the same tree is defoliated several consecutive years. Large populations of mapleworms can defoliate trees if unnoticed or without proper management. Larvae are the only herbivorous life stage, capable of devouring several entire leaves per caterpillar. Adult moths can have a wingspan of 37 to 50 mm. Full-grown larvae can reach 40 mm in length. There are two prominent horns on the second thoracic segment, two rows of short spines on the side of the body, and four larger spines on the terminal abdominal segments. The larvae have red or black heads, pale-green bodies with seven dark-green longitudinal stripes. The moths deposit yellow eggs on the underside of leaves. The body of the moth is yellow on top and pink on the bottom with wings exhibiting yellow and pink colorations that vary in design. They are commonly known as the rosy maple moth. In North Carolina, moths emerge from their pupae in late April or early May. Some oaks can also be damaged especially when in close proximity to maples. Maples are its preferred hosts and the most common hosts in many landscapes. The greenstriped mapleworm, Dryocampa rubicunda, is found throughout the Eastern United States and Canada. Identification and Damage Skip to Identification and Damage
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