摘要
对湖南、广西两省（区）９０个县市１９８１～１９８７年杂交水稻种植面积和白背飞虱发生量进行列联表分析表明，白背飞虱在大区域范围内为害加重和猖獗频率上升与杂交稻种植面积扩大呈密切的正相关。
Based on the data from 1981 to 1987 in 90 counties or cities of Hunan and Guangxi, this paper analyzes the relationship between outbreak frequency of white back planthopper ( Sogatella furcifera Horvnth) and growing area of hybrid rice by contingency table and Chi square test. It was concluded that the increasing of aggravating degree and outbreak frequency is closely related to popularizing hybrid rice in a large area.
出处
《西南农业大学学报（自然科学版）》
CSCD
1998年第5期456-459,共4页
Journal of Southwest Agricultural University
基金
"九五"国家重大科技攻关计划资助
国家自然科学重点基金
关键词
白背飞虱
杂交水稻
列联表
面积增加
white back planthopper
hybrid rice
contingency table
