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利用培养箱在恒温条件下饲养灰飞虱Laodelphax striatellus Fallén,测定了卵、若虫、成虫繁殖前和全世代发育历期,用直线回归法计算了灰飞虱各虫态和全世代的发育起点温度和有效积温分别为10.06、6.43、10.29、8.08℃和102.3、365.2、87.5、552.1日·度。并根据有效积温法则预测了该虫在济宁市1年完成的代数为4～5代。
Laodelphax striatellus Fallén was fed on the incubator at a constant temperature. The developmental durations of eggs, nymphs and adults before and during their reproduction were determined. The linear regression was used to calculate the developmental threshold temperature And effective accumulated temperature were 10.06,6.43,10.29,8.08 ℃ and 102.3, 365.287.5552.1 degrees. According to the law of effective accumulated temperature, the algebra of this insect in Jining City was predicted to be 4 to 5 generations in one year.