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通过田间调查,分析比较了有机耕种稻田和常规耕种稻田害虫和天敌的发生动态.结果表明,在有机稻田主要害虫的发生动态较对照缓和,次要害虫发生种类有所差异,而蜘蛛、捕食性昆虫和寄生蜂等稻田主要天敌数量上明显高于对照,表明停用化学合成物质后天敌的控害作用得到了恢复和明显的加强.
Through field investigation, the dynamics of pests and natural enemies in organic and conventional paddy fields were analyzed and compared. The results showed that the dynamics of the main pests in organic rice fields tended to be more relaxed than those of the control and the occurrence of secondary pests varied. However, the spiders, predation Insects and parasitic wasps and other rice fields were significantly higher than the number of natural enemies, indicating that the control of natural enemies after the withdrawal of chemical synthetic substances has been restored and significantly strengthened.