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近年来,由于保护地面积逐年扩大,连作重茬面积不断增加,使病虫为害越来越重。而在防治上,农民采用的就是喷洒化学农药,而且用药量逐年增多,致使农药残毒积累加重,特别是黄瓜往往供人们生食,因此农药的污染已在严重地威胁着人民的身心健康。为了提高蔬菜质量,减少污染,必须认真贯彻“预防为主,综合防治”的方针。要以农业防治为基础,配合进行物理和生物防治,严格选用高效、低毒、低残留农药,
In recent years, as the area of protected areas has been expanding year by year, the area of continuous cropping continues to increase, causing pests and diseases to become more and more serious. In the prevention and control, farmers use chemical pesticides to spray, and the dosage increases year by year, resulting in the accumulation of residual pesticides aggravated, especially for cucumber is often for people’s raw food, pesticide pollution has been a serious threat to the people’s physical and mental health. In order to improve the quality of vegetables and reduce pollution, we must conscientiously implement the principle of “prevention first and comprehensive prevention and control”. To be based on agricultural control, with the physical and biological control, strict selection of efficient, low toxicity, low residual pesticides,