Skillful use of Fertilizer to Control crop pests
1. Nitrogen fertilizer: commonly used nitrogen fertilizer, such as urea, ammonium bicarbonate, ammonia, etc., can stimulate, corrode and fumigate pests. It is effective to control small and weak pests such as aphids and red spiders. During the occurrence of pests, 2% urea solution or 1% ammonium bicarbonate solution was sprayed outside the root, once every 7 days, for 3 times in a row, with good control effect. two。 Phosphate fertilizer: spraying phosphate fertilizer on tomato, corn and cotton can control green insects, cotton bollworm and so on. 3. Potash fertilizer: 50kg with 10kg plant ash to water, soak for one day and night, spray with filtrate to control aphids. 4. Calcium fertilizer: the harm of corn borer and bean pod borer can be avoided by applying silicon and calcium fertilizer 30--40kg every 667m2 for corn and soybean, and the harm of armyworm can be reduced by applying 20--30kg every 667m2 to wheat. In addition, spraying with 1% urea and 1% dichlorvos EC can kill red spiders, aphids and other pests on vegetables.
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There are different uses of micro-fertilizer.
In recent years, the problems of wheat seed burning and seedling burning occurred frequently in autumn seeds, which caused 20% ~ 30% of the lack of seedlings and broken ridges, and the serious ones had to be sown again and again, and this problem showed an upward trend. In order to pursue high yield and higher yield, some farmers one-sidedly think that they can get high yield as long as they apply more fertilizer, regardless of the abundance and deficiency of nutrients in the land.
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Less crop diseases by skillful use of fertilizers
Research and practice have proved that the use of chemical fertilizer or organic fertilizer to control crop diseases and insect pests is not only economical, safe and effective, but also can save pesticides, but also has the characteristics of fertilization, no harm to natural enemies and no pollution to the environment. It is worth popularizing in production. Nitrogen fertilizer: ① ammonium bicarbonate.
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