What are the control methods for the mango green stinging caterpillar?
1. Taxonomic status The mango green stinging caterpillar, also known as the brown-edged green stinging caterpillar [Parasa consocia Walker], belongs taxonomically to the order Lepidoptera, family Limacodidae.
2. Hosts and damage characteristics Its hosts are relatively widespread, damaging mango, banana, citrus, peach, plum, plum, persimmon, Chinese chestnut, cherry, apple, pear, cherry, willow and many other fruit trees and forest trees. The larvae damage the leaves by biting them. Young larvae feed on the leaf mesophyll, leaving only the epidermis; older larvae eat the leaves into holes or notches, and in severe cases eat the entire leaf, leaving only the petiole, seriously affecting tree vigor. If a person accidentally touches its branched venomous hairs, it also causes burning pain, redness and swelling.
3. Morphology and habits The adult is a medium-sized green moth with a body length of about 16 mm and a wingspan of about 36 mm. The mature larva is about 25 mm long, flat and cylindrical, green, with hair tufts on the body segments of the trunk, and the hair tufts are densely covered with bristles (venomous hairs). In Jiangxi it occurs 2-3 generations per year, overwintering as mature larvae in cocoons on branches or in the soil around the base of the trunk. Adults are active at night and are phototactic; eggs are laid on the underside of leaves near the main vein, arranged in fish-scale-like egg masses. Newly hatched larvae are gregarious, and after the 3rd instar they disperse to cause damage.
4. Control methods (1) Spray chemicals to kill young larvae. Pesticides can be alternately sprayed: 90% trichlorfon crystal, 50% fenitrothion, malathion, phoxim emulsifiable concentrate 1000-fold solution, 80% dichlorvos emulsifiable concentrate 1000-1500-fold solution, 20% fenvalerate, 10% cypermethrin, 2.5% deltamethrin 6000-8000-fold solution. (2) Use light traps to kill adults. (3) Clean the orchard, collect dead branches and fallen leaves and burn them; properly earth up and shallowly loosen the soil to worsen the environment for larval overwintering, pupation and emergence.