摘要
根据农业害虫种群对时间的分布的研究结果,建立害虫危害期和作物受害期的时间分布。进而给出害虫危害期与作物受害期吻合度的计算公式,推出作物受害株率的预测方法和确定复合害虫种群经济阈值的有效方法。
A distribution on t coordinate axis of insects harms crop and a distribution on t coordinate axis of crop suffers injury was evaluated based On the distribution on t coordinate axis of crop pests' population. Two formula to calculate the identical degree of period when crop insects harms crop and period when crop suffers injury by insects was proposed. A method to forecast crop's injured percentage and a better method to determine economic threshold of mix-ed species population was gained.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1996年第2期141-145,共5页
Journal of Huazhong Agricultural University
关键词
农业害虫
种群
时间分布
危害期
受害期
吻合度
crop pest, mixed-species population, distribution on t coordinate axis, period of harming crop, period of suffering injury, degree of indenticalness, economic threshold
