论文部分内容阅读
通过多年调查和试验研究，弄清了本市稻田主要捕食性天敌蜘蛛和黑肩绿盲蝽在不同时期的发生规律，明确了天敌对褐飞虱的控制作用，其中以7月下旬至8月中旬和9月中旬以后最为明显；当蛛虱比或蝽虱比值小于2时，蜘蛛、黑肩绿盲蝽即能有效地控制前期稻飞虱的危害，为制定中粳稻区综合治理褐飞虱策略提供了理论依据。
Through years of investigation and experimental research, we have found out the regularity of the main predatory natural enemy spiders and black-shouldered lucoruses in rice fields at different periods in this city and clarified the control effect of natural enemies on N. lugens. Among them, from late July to mid-August and The most obvious after mid-September; when the ratio of planthopper to planthopper or planthopper is less than 2, the spider and black-shouldered planthopper can effectively control the harm of planthopper, providing theory for the comprehensive management of planthopper in mid-japonica rice area in accordance with.