Vegetable pest spraying technology

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 pest are different. According to their commonality and individuality as well as the growth characteristics of the host, targeted spraying should be carried out to make the agent directly contact with the insect body to achieve a better control effect.
1. Spraying technology is closely related to the living habits and harmful habits of pests. The aphids and some leaf-feeding pests of the sucking juice are concentrated on the parasitic leaf backs and twigs, and should be sprayed in a “dotted circle” manner. The sprayer's nozzle is sprayed with the leaves of the plant first, and then sprayed on the tender head, so that the plant and the worm are all in contact with the medicament, and can receive better control effects. 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. The time of spraying the cockroach pests must be high in the egg hatching

Peak period.

2. Spraying technology is also closely related to the growth characteristics of the host. The flowering time of cowpea in summer is about 7:30-10:30, and the petals are all closed during this time. The larvae of the first instar larvae are scattered or concentrated, and the spraying is better before 9:00 am, so that the worms can be more fully exposed to the pharmacy, otherwise the opportunity is missed. 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 is often added to the liquid to reduce the surface tension and evenly distribute the liquid on the leaves. Improve control efficiency.

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