Apple leaf roller: (1) Adult: Adult hides in the back of leaves during the day, slightly tends to light during the day, and likes sugar and honey at night. Eggs are scattered on the back of hairy leaves. (2) Larvae: after hatching, the larvae spin silk and weave leaves into bracts, which are hidden in them, and the bracts are exposed to feed on young leaves. 2 ~ 3 instar larvae overwinter in the top leaf, and the damaged top leaf buds die for a long time. Second, the characteristics of harm. Larvae harm the top of new shoots, roll leaves into a ball, feed on new buds and tender leaves, and the growing point is taken to one side by new food, which affects the formation of terminal buds and the expansion of crown. Third, harm plants. Apple, pear, peach, plum, apricot, hawthorn, loquat, begonia and so on! Use 5% carbaryl perfluorochloride emulsion in water (moderately toxic)

Spray control

This product should be used in the incubation period or larval stage of pests, and sprayed evenly. When in use, it is prepared as required, and water is stirred evenly. If it rains within 6 hours after application, it should be sprayed again. This product is a compound preparation of emamectin benzoate and beta-cypermethrin. Its action mode is contact killing and stomach poisoning, and it has the advantages of fast and strong knocking down of pests. Synergistic effect of the mixture of the two components. It is suggested that pesticides with different action mechanisms should be used in turn.