摘要
对烟粉虱卵在黄瓜上的空间分布型进行了研究.结果为:Iwao回归模型α=1.1482>0,β=1.4231>1;Talor幂法则loga=0.3984>0,b=1.5174>1.表明烟粉虱卵呈聚集分布,其聚集度随种群密度的升高而下降,分布的基本成分是个体群,个体间相互吸引.采用Iwao方法求出不同卵密度下的最适抽样数.
The spatial distribution pattern of eggs of Bemisia tabaci on cucumbers was studied. The indices for the regressive model of Iwao α = 1. 148 2 〉0, β = 1.423 1 〉 1 ;The result for Taylor power princi- ple was loga =0.398 4 〉0, b = 1. 517 4 〉 1. It was showed that the distribution pattern of eggs of B. tabaci was aggregation distribution and the aggregation intensity would decrease with population increased. The basic component of the spatial distribution was individual colony attracting each other. The optimum sampling units for the eggs of B. tabaci were obtained by Iwao＇ s method.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2007年第3期116-118,共3页
Journal of South China Agricultural University
基金
"十五"国家攻关项目(2001BA509B0604)
关键词
烟粉虱
黄瓜
空间分布型
最适抽样数
Bemisia tabaci
Cucumis sativus
spatial distribution pattern
optimum sampling units
