摘要
根据江淮稻区水稻害虫发生特点，于１９９１—１９９２年在网室和田间采用全组合随机区组设计研究了白背飞虱Ｓｏｇａｔｅｌｌａｆｕｒｃｉｆｅｒａ、稻纵卷叶螟Ｃｎａｐｈａｌｏｃｒｏｃｉｓｍｅｄｉｎａｌｉｓ、褐飞虱Ｎｉｌａｐａｒｖａｔａｌｕｇｅｎｓ三种害虫的组合侵害及对籽粒生长的影响。用生长曲线方程拟合籽粒生长过程。由生长曲线方程推导的一些参数分析害虫组合侵害对强、弱势粒生长的影响。分析结果表明三种害虫组合侵害主效和互作效应均对水稻有显著的影响。随着害虫组合侵害的加重，最大生长速率Ｖｍａｘ、旺盛生长期积累的干物重ＧＴ等参数变小。
According to the characteristics of occurrences of the three insect pests Sogatella furcifera, Cnaphalocrocis medinalis, Nilaparvata lugens in Jianghua rice district, their combined infestations and effects on grain growth of rice were studied in paddy field and cement pool with cage by random plot design of complete combination in 1991-1992. Weights of the strong grain and the weak grain were determined once every four days from heading to harvesting. The growth equation.was used to describe the grain growth process of each treatment.From first, second and third order derivatives of the equation, some parameters were derived as follows:where t = turning 2 point of growth curve, Vmax = maximum growth rate, △t=active growth stage, (grain growth becomes slow before t1 and after t2), GT = cumulative weight of dried content in active growth stage, and R0= initial growth power. Effects of combined infestation of the pests on the strong and the weak grain growth were analysed by these parameters. The results of analysis of variance showed that interaction effects were also significant in addition to the main effects of the combined infestations on yield which were significant. This indicated that the combined infestations of the pests caused economic damage even though density of each species was below economic threshold. Values of Vmax, GT t and K decreased as the infestattions aggravated. Moreover, the result of analysis also showed the effect of the infestation on the weak grain being greater than that on the strong grain.
出处
《昆虫学报》
CAS
CSCD
北大核心
1995年第1期30-37,共8页
Acta Entomologica Sinica
基金
国家自然科学基金
江苏省教委自然科学基金
关键词
虫害
白背飞虱
稻纵卷叶螟
褐飞虱
水稻
Sogatella furcifera, Cnaphalocrocis medinalis, Nilaparvata lugens, combined infestation, grain growth
