大垫尖翅蝗危害损失及预防指标的初步研究

通过对麦田大垫尖翅蝗进行笼罩试验,明确了秋麦苗蝗虫密度在0～10头/m2范围内与小麦成穗率呈极显著的负相关,而穗粒数、千粒重与虫口密度呈显著的正相关。产量损失率与虫口密度呈极显著的正相关。小麦苗期大垫尖翅蝗的防治指标为3头/m2。

Preliminary Research of Damage and Control index of Epacromius coerulipes

The damage of Epacromius coerulipes in wheat fields was studied by using cage method. The results showed that the density of Epacromius coerulipes was significantly negatively correlated with the earing percentage of wheat,positively correlated with grain number and 1 000-seed weight,significantly positively correlated with yield loss between 0-10 Epacromius coerulipes per 10 m2 and the control index definitely was 3 Epacromius coerulipes per m2.