1、 What are aphids

Aphids, also known as honeyworms and putrid insects, are phytophagous insects and one of the most destructive pests. There are many kinds of them. Now more than 4400 kinds have been found, of which 250 kinds are more harmful to agriculture and horticulture. Especially for wheat, oats, barley and other crops. In addition, it is also widely distributed, but mainly concentrated in temperate regions

2、 Prevention and control methods

1. Drug control: if a large number of aphids are found, pesticides can be sprayed for control. The drug can use 1000 times of 50% fenitrothion emulsion, 1500 ~ 2000 times of 40% imidacloprid aqueous solvent or 3000 times of 50% Pirimicarb wettable powder. Washing powder, urea and water can also be used for mixed spraying, and the effect can be achieved by spraying two or three times continuously

2. Artificial control: in autumn and winter, you can brush white on the base of the trunk to prevent aphids from laying eggs. It is also necessary to combine pruning, cut off the residual flowers, and burn the twigs and ends. When a small amount of aphids are found in spring, they should be brushed off with a brush to avoid continued reproduction

3. Protection of natural enemies: it has many natural enemies, such as ladybugs, parasitic wasps and sandflies, which have a strong inhibitory effect on aphids. Therefore, less broad-spectrum pesticides should be applied to avoid killing natural enemies. If conditions permit, the natural enemies of aphids can also be raised artificially, which can be effectively controlled by releasing them in the land where aphids are active