Prevention and control methods: In addition to strengthening fertilizer and water management, diseased dead branches should be cut off in time in late autumn, fallen leaves and weeds in the garden and under trees should be removed, and centralized incineration should be carried out. Spraying 1 times 1: 1: 100 times bordeaux solution five days before onset for prevention. At the onset stage, it can be sprayed with 1: 2: 200 times Bordeaux solution or Pomei 0. 1 ~ 0.2 degree stone sulfur mixture or 65% zineb 500 times solution for 2 ~ 3 times.

(2) Pepper

Larvae mainly eat phloem and xylem of branches. The 3-year-old tree began to suffer, and the older the tree, the more serious the damage.

Control method: In late April, when the overwintering larvae begin to flourish and the glue on the branches is obvious, scrape the glue with a sickle, and then apply omethoate or methamidophos emulsifiable concentrate with a time of 10, or directly dig the worms with a sickle. After the pepper was harvested in late August, it was controlled by the upper method again.

(3) Zanthoxylum bungeanum aphid

It began to appear in early April and propagated for more than 20 generations a year. Common control agents and their concentrations are: 40% omethoate, 800 ~ 1000 dimethoate, 2000 ~ 3000 times 50% pirimicarb and 4000 times 50% chlorpyrifos.

(4) Papilio

Larvae and pupae can be artificially killed in mild cases, and 50% trichlorfon 1000 times solution or 80% dichlorvos emulsion 1000 times solution can be sprayed in large cases.