摘要
应用频次分布X2检验法和6种聚集度指标对棉大卷叶螟的空间分布型进行了分析。结果表明:棉大卷叶螟幼虫在木槿上呈负二项分布,分布的基本形式是以个体形式存在。垂直分布调查结果表明:棉大卷叶螟幼虫主要集中在木槿上部区段进行为害,其次是中部,下部最少。
The spatial distribution pattern of cotton leaf roller was analyzed by applying the frequency distribution of X^2 test and six sorts of gathering index method. The results showed that the space distribution pattern of the larvae on Hibiscus syriacus was negative binomial distribution in the form of individual. The vertical distribution of the larvae concentrated mainly on the upper section of the H. syriacus, secondly on the center, and the least on the lower.
出处
《河北农业科学》
2008年第12期18-19,共2页
Journal of Hebei Agricultural Sciences
关键词
棉大卷叶螟
木槿
空间分布型
Sylepta derogate Fabricius
Hibiscus syriacus
Spatial distribution pattern
