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在农作物害虫防治工作中,合理使用农药,保护害虫天敌,发挥自然天敌对害虫的控制作用,是一个值得认真注意的问题。近年来,我们在少施或不施用化学农药的稻田,发现田间捕食性和寄生性天敌有明显增加的现象,其中稻田蜘蛛是捕食性天敌的主要一类。我们于1977年对稻田蜘蛛种类、优势种的消长及其对稻飞虱的控制作用进行了一些观察。一、稻田蜘蛛种类据报导,我国稻田蜘蛛多达90余种,占稻田捕食性天敌总数的60～80％。我们在广西全州、荔浦、兴安等县的部份地区调查,
In crop pest control, the rational use of pesticides, natural enemies to protect pests and natural enemies play a controlling role in pests is a matter worth serious attention. In recent years, with or without the application of chemical pesticides in paddy fields, we found that there was a significant increase in the predatory and parasitic natural enemies in the field. Among them, the spiders in the rice fields were the predominant predators. In 1977, we made some observations on the types of spiders, the growth and decline of dominant species and their controlling effects on planthoppers. First, the type of spider rice It has been reported that as many as 90 species of rice spiders in China, accounting for 60-80% of the total number of predatory enemies in paddy fields. We in Guangxi Quanzhou, Lipu, Xing’an counties in some areas of investigation,