Migratory biology of the white backed planthopper Sogatella furcifera (Horváth):Case studies in Huizhou, Anhui Province
Author of the article:DIAO YongGang**ZHANG GuoYANG HaiBoQU YuFengZHANG XiaoXiZHAI BaoPing
Author's Workplace：Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Insect Pests, Ministry of Education,Ministry of Agriculture of China, Nanjing210095, China
Key Words：white back planthopper, takeoff, rice growth stages, wing dimorphism, population characteristics
Abstract： The takeoff behavior, wing dimorphism and population characteristics of the white backed planthopper Sogatella furcifera (Horváth) (WBPH) in different years, locations and generations were studied by field surveys, ovarian dissection and observation of captive insects. The main results were: (1) The majority of the second and third generations of WBPH are emigrants colonizing earlymid rice but, in 2009, the number of emigrants declined significantly after rice reaches the waxen maturity stage; (2) The number of emigrants was correlated with adult density; (3) heavy precipitation affects the number of insects that take to the air; (4) The ratio of the macropterous adults in most of the local generations was more than 80% and their wing forms were ‘macropterousmacropterousmacropterous’ in successive generations, a different pattern to that observed in the brown planthopper Nilaparvata lugens (Stl), (5) There was no relationship between the number of insects taking to the air, or otherwise emigrating, and rice growth stages; (6) The population characteristics of the WBPH could be classified into three types: mostly immigrants, partly local breeding and partly emigrated, and mostly emigrated.