How to control boxwood pests? These methods are very practical

The larvae damage host plants such as boxwood, small-leaved boxwood (Buxus sinica), big-leaved boxwood (Buxus megistophylla), little-leaved boxwood, Japanese boxwood (Buxus microphylla), spoon-leaved boxwood, Korean boxwood, and holly by spinning silk to tie leaves together into nests. The damaged leaves first show yellow blighted spots, and later the entire leaf falls off. By spinning silk, they bind the leaves and the damaged fallen leaves together, preventing the leaves from spreading out, so growth and development are severely affected, and in severe cases the whole plant dies.

In Shanghai, 3 to 4 generations occur per year, with severe overlapping of generations; they become active in March of the following year, begin pupating in mid-April, begin 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, eggs are laid in late June, and at the same time the second-generation larvae begin to appear; they 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; they pupate in mid-August, 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. Larvae of the 1st to 2nd instars feed on the leaf mesophyll, and after the 3rd instar they spin silk to make nests and feed inside them. Adults hide during the day, are active in the evening, have weak flying ability, and are not strongly phototactic.

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