Anti-vegetable pests have tips

There are many kinds of vegetable pests, but they can be classified into three categories: sucking juice, food leaf and drill collar. The living habits of each type of pests are different. According to the living habits and habits of the pests and the growth characteristics of the host, the targeted spraying should be carried out to prevent the pesticides from directly contacting the insects to achieve the desired control effect.

Most of the sucking aphids and some leaf-eating pests are concentrated on the host's leaf back and twigs. They should be sprayed in a "dotted circle" manner, that is, the nozzle of the sprayer first sprays the leaves of the plant and then buckles. Spray on the tender head, so that the plant and the worm are all in contact with the medicament, and a better control effect is obtained. The older larvae of Spodoptera litura and Spodoptera exigua are concealed during the day, so spraying the pests during the growing season should be carried out in the evening. To control drill collar pests such as rapeseed, it is necessary to spray at the peak of egg hatching.

The growth characteristics of the host are different, and the spraying time and method are also particular. Summer cowpea blooms from 7:30 to 10:30 in the morning. After this time, the petals are all closed. The first instar larvae of the cowpea are concentrated on the flower buds, petals or stalks and receptacles. Spraying at 9:00 am The behavior is appropriate, so that the worm can be more fully exposed to the agent. The leaves of cabbage vegetables are covered with a layer of wax powder. When the biological insecticide Bt is used to control cabbage caterpillars, 0.1% washing powder solution should be added to the liquid to reduce the surface tension and evenly distribute the liquid on the leaves. Improve control efficiency.

Author: Chen Maochun
Source: Henan Science and Technology News
【Comment】 【Print this article】 【Close this page】 【Large, medium and small】

Wire Mesh

Welded Wire Mesh,Wire Mesh,Wire Mesh Panel

Iron Wire Co., Ltd. , http://www.farm-fences.com