Abstract: The study on population dynamics and economic threshold of A.agrarius in single rice growing regions were carried out during 1992-1994,the population has two reproductive peak perlods from April to May and from September to Octomber,and their corresponding peak population densities occured in May to July and October to November respectively.At different rice growing stage,the mouse density(x) had significantly positive relationship with rice yield loss rate(y).It was suggested in the paper that early spring be the most optimal control time of the Rats Under the current production conditions,the economic threshold densities were 3-4% in early spring,6-7% for single cropping,respectively.

摘要： 1992～1994年研究了黑线姬鼠发生动态和防治指标。结果表明,4～5月、9～10月为繁殖高峰,5～6月和10～11月为数量高峰。水稻不同生育期害鼠密度(x)与产量损失率(y)呈显著正相关。早春为防治适期,在现有的生产水平条件下,防治指标为3～4%,主害期防治指标为6～7%。

关键词: 黑线姬鼠, 发生动态, 为害损失, 防治指标