二化螟的发生规律及防治对策

田间调查表明,二化螟在黑龙江省五常地区一般每年发生一代。在秋霜晚、有效积温高的年份能发生一代半。可根据黑光灯诱集的成虫数、二化螟低龄幼虫群居和转株的时间以及气候条件进行预报。确立了防治的原则、方针、指标、时期和方法。

Occurrence Law of Striped Rice Borers and Countermeasures for control

The field investigation showed,striped rice borers appeared one generation a year in average in Wuchang areas in Heilongjiang province.In the years that the autumn frost came late and high effective cumulative temperature;could occur one and a half generations,so it could be forecasted by the number of full-grown pests traped by black light lamps,the time living in groups and moving to other plants and climate conditions,made the principle,norm,periods and methods.