The results showed that the planthopper populations at the stages of adult, nymph and the pooled nymphs and adults in the sampled fields tended to be in aggregative patterns of spatial distribution.

• 结果表明：麦田灰飞虱成虫、若虫和成若虫田间分布趋于聚集分布，其聚集原因主要是由灰飞虱生物学特性和环境因素引起的。