There are many species of pepper pests in China, and about 132 species are known. Such as beetle class, pepper jump A, Zanthoxylum axies, pepper scale insects, red pepper and Other spiders. As the main producing area of ​​pepper, Shaanxi Province, Han City, Panlong Township, Shaanxi pepper farmers have no idea about the recent zanthoxylum.
On May 5th, the pepper farmer Liang Yinting in Panlong Township, Hancheng, Shaanxi Province, called the newspaper and said that there are many scale insects on its 20-plus-acre prickly ash tree, making the prickly ash tree appear with symptoms such as shoot tip and yellow leaf. In response, the reporter interviewed Shi Chunxi, a professor at the Plant Protection College of Northwest Agriculture and Forestry University.
According to Professor Shi’s introduction, the Japanese pepper scale insects are collectively known as the cricket species that harms peppercorns in the order Homophoridae. They often cluster on branches and leaves and absorb plant sap for a living purpose. In severe cases, they cause wilting of branches or death of whole plants.
Scale insects have a good ability to reproduce and multiply for one generation a year. The egg hatches as a nymph and after a short crawl, it forms a shell.
Morphological characteristics: The body size is much smaller, male and female, females are fixed on the leaves and branches, and the body surface is covered with waxy secretions or shells. General scale insects spawned under the shell, the newly hatched nymphs were not covered by wax or shells, crawling on the leaves and branches, seeking proper feeding position.
Control methods: scale insects have strong anti-drug ability, and it is difficult for general agents to enter the body and control is difficult. Therefore, once it occurs, it is not easy to clean. Experts suggest that scale insect control focuses on the nymph stage.
Physical control: In winter and spring, use grass or a brush to wipe off the overwintering females on the main trunk or branches, and the inside of the beak.
Chemical control: In the end of March, use 1:5 times omethoate solution to coat the trunk with 10 ml per plant or 5 to 10 ml per plant with the dimethoate solution. In the late May and late August, the larvae disperse with 1:1000. The dimethoate and dichlorvos solution was sprayed on the trunk of pepper for two or three times.
Biological control: scale insects have many natural enemies in the natural world, such as parasitic wasps, ladybugs, grasshoppers and so on.
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