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异须盲蝽在河北省南皮县一年发生 4代 ,以卵在植物组织中越冬 ,4月上旬孵化。一代发生在杂草丛中 ,二、三、四代发生于棉田 ,与棉铃虫的发生期较吻合。成虫对花有显著的趋性 ,各代发生高峰期分别在 5月中旬、6月下旬、7月下旬和 8月中旬。成虫与棉铃虫卵的空间分布相似 ,平均生态位重叠度指数高为 0 .95 6± 0 .2 3;在田间的分布符合负二项分布和奈曼 A型分布 ;对棉铃虫卵的捕食功能反应符合 Holling 圆盘方程 ,最大理论捕食量为每天 2 4粒。分析推断认为 ,异须盲蝽对棉田 ,尤其是 Bt棉田中后期棉铃虫有较强的控制作用
Eupolyphagous nauplii in Nanpi County, Hebei Province, occurred four generations a year, with eggs in the winter in plant tissues, hatch in early April. The first generation occurred in weeds, and the second, third and fourth generations occurred in cotton fields, which coincided with the occurrence of cotton bollworm. Adult flowers have a significant tendency, the peak occurrence of each generation in mid-May, late June, late July and mid-August. The spatial distribution of egg of adult and Helicoverpa armigera was similar, with the average index of overlap of niche being 0.95 6 ± 0.23; the distribution in the field was in accordance with the negative binomial distribution and Neyman A distribution; The functional response conformed to the Holling disc equation and the maximum theoretical predation amount was 24 grains per day. It is concluded from the analysis that Isochrysisis has a strong control effect on cotton bollworm in the late-stage of cotton field, especially in Bt cotton field