Method for preventing and controlling plant diseases and insect pests by intercropping of vegetables

Abstract

The invention discloses a method for preventing and controlling plant diseases and insect pests by intercropping of vegetables, and belongs to the field of modern pollution-free agricultural prevention and control of plant diseases and insect pests. Green onion and leaf vegetable are intercropped, a planting mode of 20 centimeters with a field is adopted, the green onion is planted in 5 rows and the row distance is 3 centimeters, the leaf vegetable is plant in 1 row and the row distance is 5 centimeters, 5 rows of green onion is planted with the seedling density per mu of 4,800 plants, then 1 row of leaf vegetable is planted, and the green onion and the leaf vegetable grow at intervals; the plant diseases and the insect pests can be controlled by using the growth habit difference of the green onion and the leaf vegetable and the strong pungent smell of the green onion; and the plant diseases and the insect pests of the green onion are original little, and the eggs of the plant diseases and the insect pests of the green onion planted field are relatively little, so the prodenia litura fabricius of the leaf vegetable is reduced by over 30 percent, the cabbage worm is reduced by 20 percent, the soft rot disease of the leaf vegetable is reduced by 18 percent, the downy mildew is reduced by 12 percent, and the generation of other plant diseases and insect pests of various leaf vegetables is also lightened obviously; therefore, the prevention and control effect which is better than that of pesticide application is achieved without applying pesticide. The pesticide pollution can be reduced, the agricultural insecticidal cost is lowered, the yield is improved, and the effects of greenness, safety and health are completely achieved.

Description

technical field [0001] The invention belongs to the field of agricultural pest control for vegetable planting, in particular to the field of modern pollution-free agricultural pest control. Background technique [0002] At present, the known methods of agricultural prevention and control of diseases and insect pests all achieve their goals through various pesticides. This not only increases the cost of pest control, but also causes environmental pollution, which affects people's demand for green and pollution-free vegetables. Especially when the area of ​​vegetable fields continues to expand and organic fertilizers are seriously insufficient, vegetable farmers use a large amount of chemical fertilizers and pesticides to prevent insects and obtain high yields. At present, underground pests are becoming more and more serious, and it is difficult to kill pesticides at ordinary concentrations. It is necessary to increase the concentration and shorten the time between spraying t...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of current agricultural use of pesticides to prevent and control pests causing environmental pollution and excessive pesticide residues in ve