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用肥料防治农作物病虫害,不但能防止因农药使用不当而造成的药害,而且还具有施肥增产的作用,是一种安全、经济而有效的好办法。具体方法有以下八种: 一、磷肥驱虫法 1.在棉田喷施磷肥,可有效地防治棉铃虫的危害。棉铃虫在产孵期对磷最为敏感。遇磷元素会立即逃避。根据它的这一特殊习性,可在产卵期用2%的过磷酸钙浸出液对棉花进行叶面喷施,每隔5～6哇留1畦不喷,以驱使棉铃虫集中产卵,然后集中灭除,效果良好。2.用1%过磷酸钙浸出液喷洒番茄,对防治脐腐病也有明显的效果。
Prevention and control of plant diseases and insect pests with fertilizers not only prevent pesticide damage caused by improper use of pesticides, but also have the effect of fertilizing and increasing yield, which is a safe, economical and effective way. The specific methods are the following eight: First, phosphorus insecticide 1. Spraying phosphate fertilizer in the cotton field, which can effectively control the harm of cotton bollworm. The bollworm is the most sensitive to phosphorus in the hatching period. Phosphorus element will immediately escape. According to its special habits, in the spawning period with 2% superphosphate leaching solution of cotton foliar spray every 5 ~ 6 wow leave 1 畦 do not spray to drive the cotton bollworm spawn, and then Concentrated off, the effect is good. 2 with 1% superphosphate leaching solution spray tomato, umbilical rot on the prevention and treatment also have significant results.