Home › Nursery Stock › Article

What are the occurrence patterns of the black-spotted inchworm on black locust

Nursery Stock 0 views
Occurrence patterns of the black-spotted inchworm on black locust: it has 4 generations a year and overwinters as pupae in the surface soil. In early April of the following year, eclosion begins, followed by mating and egg laying; the egg stage lasts 15 days, and the larval stage about 25 days. In early May, the larvae begin to enter the soil to pupate; the pupal stage lasts about 10 days, after which the first-generation adults emerge, with an adult lifespan of about 5 days. Second-generation adults appear in early to mid-July. Third-generation adults appear in mid-to-late August, and the larvae of the last generation cause damage until mid-September, after which they mature, enter the soil, and pupate to overwinter. Eggs are laid in the cracks of rough bark below 2 m on the tree trunk base, piled into masses and covered with gray down. Newly hatched

Occurrence patterns of the black-spotted inchworm on black locust: it has 4 generations a year and overwinters as pupae in the surface soil. In early April of the following year, eclosion begins, followed by mating and egg laying; the egg stage lasts 15 days, and the larval stage about 25 days. In early May, the larvae begin to enter the soil to pupate; the pupal stage lasts about 10 days, after which the first-generation adults emerge, with an adult lifespan of about 5 days. Second-generation adults appear in early to mid-July. Third-generation adults appear in mid-to-late August, and the larvae of the last generation cause damage until mid-September, after which they mature, enter the soil, and pupate to overwinter. Eggs are laid in the cracks of rough bark below 2 m on the tree trunk base, piled into masses and covered with gray down. Newly hatched larvae migrate along the trunk and branches to the leaves, gnawing the leaf mesophyll and leaving the epidermis. As the instar increases, the amount eaten grows, and damaged leaves become notched or holed. When disturbed, the larvae spin silk and hang down, dispersing with the wind; while feeding, they spin silk and web branches and leaves together into a web-like curtain. Adults are phototactic.

Related Articles