摘要
文章研究了黑龙江省水稻二化螟虫口密度与水稻产量损失的关系和经济阈值，为指导黑龙江省水稻生产，防治二化螟提供了理论依据。结果表明，在水稻分蘖期，二化螟虫口密度（X）与产量损失率（Y）的回归方程为：Y=2．0536X-4．2161，R2=0．9756；枯心率（X）与产量损失率（Y）的回归方程为：Y=1．7187弘2．7756，R2=0．9704。在水稻孕穗期，虫口密度（x）与产量损失率（Y）的回归方程为：Y=I．1971X-0．5521，R2=0．9646；白穗率（X）与产量损失率（Y）的回归方程为：Y=1．5032X-1．9087。R2=0．9806。在水稻分蘖期，其经济阈值为每100丛水稻有二化螟幼虫90～116头；在水稻孕穗期，其经济阈值为每100丛水稻有二化螟幼虫60—103头。
This paper researched on that the investigates the relationship between population density and yield loss and economic threshold of the rice stern borer, Chi/o suppressa/is （Walker） in Heilongjiang Province. The results showed that, at tillering stage of rice, the regression equation of population density and yield loss was Y=2.0536X-4.2161, R2=0.9756; the regression equation of dead heart rate and yield loss was Y=1.7187X-2.7756, R2=0.9704. At booting stage of rice, the regression equation of population density and yield loss was Y=1.1971X-0.5521, R2=0.9646; the regression equation of white head and yield loss was Y= 1.5032X-1.9087, R2=0.9806. The economic threshold was 90-116/100 clump at tillering stage and 60-103/ 100 clump at booting stage.
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2012年第1期43-47,共5页
Journal of Northeast Agricultural University
基金
东北农业大学创新团队项目
关键词
二化螟
黑龙江省
虫口密度
产量损失率
经济阈值
Chilo suppressalis （Walker）
Heilongjiang Province
population density
yield loss
economic threshold
