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化学农药的使用对防治农业病虫害起着重要作用。但同时也带来了一系列严重的后果,生态环境遭到污染。农田生态平衡遭到破坏,各种病虫逐年产生抗药性,人畜不同程度地受到农药毒害。因此,除了大力发展高效低毒农药外,对蔬菜更需要探讨新的、无公害的防病途径。 我省大白菜的霜霉病和软腐病的发病率约占种植面积的17.6%以上,是蔬菜中毁灭性的病害。仅我省每年因霜霉病和软腐病所造成大白菜绝收或减产的损失就高达几千万元。当前,对大白菜霜霉病和软腐病的防治药剂较多,如乙磷铝、瑞毒铜,农用链霉素,代森锌、敌克松等等。虽起到了一定的防治作用,但收效甚微。为了提高防
The use of chemical pesticides plays an important role in preventing and controlling agricultural pests and diseases. However, it also brought a series of serious consequences and the ecological environment was polluted. Ecological balance of farmland has been destroyed, and various pests and diseases develop drug resistance year after year. People and livestock are poisoned by pesticides to varying degrees. Therefore, in addition to vigorously develop high-efficiency and low-toxic pesticides, it is even more necessary to explore new and pollution-free pathways for preventing diseases in vegetables. The incidence of downy mildew and soft rot in Chinese cabbage is about 17.6% of the planted area, which is a devastating disease in vegetables. Only in our province due to downy mildew and soft rot caused by Chinese cabbage must not yield or cut as much as tens of millions of dollars. At present, the prevention and treatment of cabbage downy mildew and soft rot are more agents, such as phosphorus phosphorus, Ru Rudu copper, agricultural streptomycin, dexamethasone, diketone and so on. Although played a role in prevention and treatment, but with little effect. In order to improve prevention