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近几年,在蔬菜生产中出现大量、频繁地使用各种化学农药来控制病虫害发生的现象。大量不合理地使用化学农药,破坏了菜田生态环境,天敌种群衰弱,病虫产生抗药性。为了确保产量,又不得不加大农药用量,从而形成恶性循环,造成农产品中农药的残留量严重超标,危害人类健康。因此,生产无公害蔬菜,要以健身栽培为基础,优先采用农业、物理、生物防治措施,科学使用化学农药,协调各项防治技术发挥综合效益。一、通过选用良种、合理轮作、科学的栽培管理等各种农业防治措施来提高蔬菜本身抗病虫抗逆能力1.选用优良抗病品种:各种蔬菜都有针对重要病害的
In recent years, there have been numerous and frequent use of various chemical pesticides to control the occurrence of pests in vegetable production. A large number of unreasonable use of chemical pesticides, undermining the ecological environment of vegetable fields, natural enemy population weakness, pest insects produce resistance. In order to ensure the output, but also have to increase the amount of pesticides, resulting in a vicious cycle, resulting in serious excessive pesticide residues in agricultural products, endangering human health. Therefore, the production of pollution-free vegetables should be based on fitness cultivation, giving priority to agriculture, physics and biological control measures, using chemical pesticides scientifically, and coordinating various prevention and control technologies to exert comprehensive benefits. First, through the selection of seeds, reasonable rotation, scientific cultivation and management and other agricultural control measures to improve the resistance of pests and insect resistance of vegetables 1. Selection of excellent disease-resistant varieties: all kinds of vegetables have important diseases