What are the control methods for the box tree webworm (Glyphodes perspectalis)?

It damages boxwood, boxwood (Buxus sinica), large-leaved boxwood, small-leaved boxwood, Japanese boxwood, spoon-leaved boxwood, Korean boxwood, holly and others.

The larvae spin silk to bind leaves together and make nests, damaging the host plants. The damaged leaves first show yellow dead spots, and later the entire leaf falls off. They spin silk to bind the leaves and the damaged fallen leaves together, so that the leaves cannot spread out and growth and development are severely affected; when the damage is severe, the whole plant dies.

In Shanghai it has 3 to 4 generations a year, with serious overlapping of generations; it becomes active in March of the following year, begins pupating in mid-April, begins emerging in late April, and the first-generation larvae appear in early May; the first generation begins pupating in early June, the first-generation adults emerge in mid-June, and eggs are laid in late June; at the same time the second-generation larvae begin to appear, pupate in mid-July, and the second-generation adults appear in late July; eggs are laid in early August, and at the same time the third-generation larvae appear, pupate in mid-August, and the third-generation adults begin to emerge in late August; eggs are laid in early September, the overwintering-generation larvae appear in mid-September, and they enter the overwintering period in mid-October. The 1st- to 2nd-instar larvae feed on the leaf mesophyll; after the 3rd instar they spin silk to make nests and feed inside them. The adults hide during the day and are active in the evening; their flying ability is weak and their phototaxis is not strong.

Control methods: during the period from larval hatching to the 2nd-instar damage stage, spray 20% Chongwushe 1000-2000 times dilution, or 4.5% beta-cypermethrin 1500 times dilution.