It is very harmful to the leaves, causing them to lose luster and turn to gray white, at the same time, it causes the leaves and the withered shoots. Yellow spiders cause distorted leaves. Rust mites cause rust brown or yellowish brown on the back of the leaves and black brown on the affected fruits.
(1) spray once in early spring or coat the main pole with stone sulfur mixture.
(2) the acaroid mite 1000-1500 times liquid spray or 73% grams of mites 2000-3000 times. First control the central plant, and then large-scale control.
The larva will eat under the skin of the twigs, leaves and fruits, producing a white insect path, causing the leaves to curl and become brittle and then fall off, and the damaged fruits are easy to rot.
(1) control the summer and autumn shoots, remove the early or late shoots and redundant shoots, and cut off their food chain.
(2) focus on the prevention and control of vigorous summer shoot and autumn shoot. It's better to alternately use pesticides to obtain better efficacy. When the shoot rate reaches more than 20%, spray for the first time, and use chonh dichloride, high-efficiency cypermethrin 1500-2000 times solution, and 20% scavenge.
