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在广东省广州市花都区和白云区系统调查了稻菜轮作田、水稻连作田的水稻害虫褐飞虱Nilaparvata lugens(Stl)及其捕食性天敌蜘蛛的数量,结果表明:与水稻连作相比,花都区稻菜轮作模式总体上降低了褐飞虱数量,同期最高降低66.6%,对田间蜘蛛数量影响不明显;白云区的稻菜轮作模式也显著降低了褐飞虱的数量,同期最高降低56.3%,对蜘蛛数量的影响也不明显。稻菜轮作模式能有效降低田间褐飞虱数量,有利于水稻生产。
The number of Nilaparvata lugens (Stl) and its predatory natural enemies, Nilaparvata lugens (NIL), and its predatory natural enemies, were determined in Huadu and Baiyun districts of Guangzhou, Guangdong Province. The results showed that compared with continuous cropping rice , The rice rotation pattern in Huadu District generally reduced the number of BPH, the highest decrease of 66.6% in the same period, and had no significant effect on the number of spiders in the field. The pattern of rice rotation in Baiyun District also significantly reduced the number of BPH, the highest decrease of 56.3% The impact on the number of spiders is not obvious. Rice rotation mode can effectively reduce the amount of brown planthopper in the field, which is good for rice production.