Research and practice have proven that crops can be controlled or mitigated by cropping or interplanting, interplanting, or mixed cropping, and that the occurrence of certain pests and diseases can often be controlled or mitigated, thus receiving the effect of “do not apply pesticides and win pesticidesâ€. 1. Intercropping with wheat and cotton This method of arranging is very advantageous for controlling cotton aphids at the seedling stage. Because of the barrier function of wheat, cotton intercropping of wheat not only directly affects the migration of cotton aphid, but also the temperature of cotton field is about 1 °C lower than that of monocropping field. With the action of natural enemies of wheat, seedling mites can be controlled without pesticide control. 2. Wheat smoke intercropping can effectively control the damage of haze because the wheat strain can hinder the migration of smoke cockroaches, coupled with the role of natural enemies such as coccinella. According to the Institute of Special Purposes of Shaanxi Academy of Agriculture and Forestry Sciences, tobacco mosaic disease occurred in Shanzuo Tian. The rate of diseased plants was as high as 62.7%, and only 5% of the fields were planted. 3. Cotton mungbean intercropping in May and June, the monoculture of cotton trees is small, not conducive to natural enemies hidden, habitat; intercropping field mung bean hair faster, the field climate is conducive to the survival of natural enemies, reproduction, and soybean meal is a good food for natural enemies, so natural enemies Increase the amount of cotton pests to reduce, generally less l ~ 2 times. 4. Intercropping cotton fields in cotton fields One row of rapeseeds is planted in every 8 to 10 rows of cotton in the cotton field. The rapeseed grows quickly, leaves are lush, and rapeseed sprouts earlier. It attracts natural enemies to settle and breed; after the occurrence of cottonseed, rapeseed The natural enemies automatically transfer to nearby cotton seedlings, which can effectively control or reduce the occurrence and damage of cotton aphid and cotton bollworm. 5. Interplanting corn in cotton fields Every 10 meters of cotton field sowing 10 rows of corn (50 to 60 piers per acre and 2 to 3 per pier) can effectively improve the ecological structure of cotton fields and trap cotton bollworm and corn borers. Thus reducing the amount of eggs on the cotton seedlings. 6. Cotton or rapeseeds garlic garlic volatile allicin has a spicy odor, can make cotton or rape aphids "back home"; the same time, the second generation of cotton bollworm also significantly reduced the occurrence. According to the survey on cotton, the cotton seedlings were not curled before June 10, and the seedlings were not used for control. The same conditions for the monoculture Tianmiaojing were controlled twice, and the highest leafing rate was still 25% to 28%. The second generation of H. armigera was planted with only 12 eggs, and the monoculture field was 100 eggs. 7. Soybean or peanut intercropped ramie in the soybean or peanut ground, evenly planted on the ground and 200 to 300 ramie, can make the turtle shelled to the bean field, peanut field to eat ricinus leaves poisoning, its death The effect is no less than the application of chemical pesticides. According to the test, 350 to 400 ramie are planted uniformly in the peanut field per mu. Each ramie can kill 4 to 5 heads of gold tortoises on average, reducing the population by 90%, and reducing the rate of peanuts to below 5%. Increase production by more than 10%. 8. Pumpkin nectar among maize species can attract the parasitoid natural enemies of the corn borer, the black egg bee. The parasitic effect of the black egg bee can effectively reduce the damage of the corn borer. 9. Corn intercropping can also significantly reduce the damage of corn borer. 10. Intercropping Maize and Spicy Pepper As a result of the shading effect of corn, the incidence of sunburn and virus disease in pepper was 72% lower than that of Shanduo. Intercropping maize and green peppers reduced the incidence of green pepper virus disease by 56.9%. 11. Cucumber cultivation within the corn can reduce cucumber mosaic disease by 61.6%. 12. Intercropping maize as the temperature in the field is 0.5°C lower than that in the monocropping field, and the ground temperature is reduced by 2°C, which can reduce the viral disease of cabbage by more than 20% and white spot disease by 18%. The incidence of soft rot and downy mildew of cabbage is also significantly reduced. . 13. Potato and garlic intercropping can inhibit the occurrence of potato late blight. 14. Scallions and carrots are planted together. Their respective odors can expel each other's pests. 15. Cabbage grown between garlic lines can reduce the soft rot of cabbage by 62.5%. 16. Brassica, cabbage and other cruciferous vegetables intercropping lettuce, tomato or peppermint which emits a pungent odor can make the white butterfly on the cruciferous vegetables to lay eggs and avoid them.
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