Peargrass, also known as Peargrass, is the main pest of peach trees in autumn. It occurs from 5 to 6 generations a year, and sucks sap near the main veins of the nymphs and nymphs, causing the leaves to turn pale and leafy back often. There is a layer of rust-colored faeces, which affects the respiration of the leaves, promotes early defoliation, and influences the growth and development of the tree vigor and the formation of flower buds. At present, it is the period in which the peach tree nets become a nymph and it must be promptly handled.
1. In winter or early spring, scrape the old skin of the trunk, remove the litter and weeds around the peach trees, and reduce the source of overwintering insects.
2. Under the control of pesticide spraying in time when large quantities of overwintering adults migrate into the peach orchard. The effective medicine is: 20% leafhopper powder (Xiebuwei) EC 800 times or 40% omethoate EC 1000 to 1500 times liquid to kill adults.
3. In the peak period of nymphs, use 25% Buprofone WP 1000x or 25% pymetrozine WP 1500 to 2000x or 25% Malathion 1200 to 1500x or 50% Anti-Wan Granville WP WP 2000 to 2500 times, using high pressure nozzle spray, spray once every 7 days, even spray 2 to 3 times, can receive significant results.
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