Privet inchworm

Scientific name: NaxaseriariaMotschulsky morphological characteristics: adult wing spread about 40 mm, slender body, yellow-white. The front and rear wings are thin, white and slightly transparent, with two rows of black stellate spots on the outer edge and a large black spot in each wing. The front wing also has a row of black and brown spots near the base angle. The eggs were white at first, then gradually changed to orange-red, shiny and arranged in the shape of beads. The larvae are about 30 mm long, dark brown, with inconspicuous black patterns and spots. Except for the chest foot and the eighth and ninth abdominal feet, the other abdominal feet degenerated, and each segment had gray hairs. The pupa is yellowish brown with dark brown spots and patterns. Damage: the insect is mainly harmful to privet, water wax, sweet-scented osmanthus, is a gluttonous leaf-eating pest, often cluster damage, nibbling leaves. Especially when the insect population density is large, the whole plant or pieces of water wax and privet leaves can be eaten in a short period of time, seriously affecting the growth and ornamental. Occurrence regularity: the insect produces two generations a year and overwinters as middle-aged larvae on the canopy. Pupation begins in mid-May and Eclosion at the end of May and early June. Adults lay eggs in strings after mating on the silk net. After the eggs hatch, the larvae spin silk and form a net on the crown, nibbling away at the leaves until they are eaten and then spread to the neighboring canopy. The second generation of adults appeared in about August, and the adults had phototaxis. Control methods: 1. In the peak period of adult Eclosion, light the lamp to trap and kill the adult. 2. Its pupa and eggs are hung on the silk net near the crown of the tree, which can be searched and removed. 3. At the initial stage of hatching, the larvae were sprayed with 1000 times of insecticides such as dichlorvos, trichlorfon and omethoate for 1-2 times. The insect has strong resistance to pesticides and should be sprayed thoroughly, and early spraying should be mastered, otherwise the efficacy will be affected.