(1南京农业大学植物保护学院昆虫学系 农作物生物灾害综合治理教育部和农业部重点实验室南京210095；
2广东省农业科学院植物保护研究所广州510640； 3安徽省潜山县植保站潜山246300)摘要通过田间系统调查与雌虫卵巢系统解剖研究了2008—2010年潜山混作稻区白背飞虱Sogatella furcifera (Horváth)的种群动态以及各发生世代的虫源性质，并结合2005年以来的灯诱及田间普查资料分析了造成不同年份白背飞虱种群消长态势差异性的主要原因。结果表明：（1）第3、4代白背飞虱分别在8月初和9月上中旬有2个发生高峰期，其中第3代主害单季中稻，第4代主害双季晚稻。（2）单季中稻和双季晚稻田白背飞虱各发生世代的虫源性质有所不同，中稻田四（2）代后期、五（3）代前期属于本地滞留、部分迁出，五（3）代后期属于大部迁出、少量滞留为害；而晚稻田五（3）代后期为基本迁入型，六（4）代前期为本地繁殖、少量迁出型，六（4）代后期大部迁出。（3）前期迁入虫量会影响田间2、3代种群数量，中稻田第3代滞留虫量的多少是影响双晚田后期发生量的重要因素，而降雨、温度等气象因子则是影响主害代（第3代）种群迁出与滞留的关键因子。
关键词白背飞虱， 卵巢发育， 发生动态， 种群性质

Migratory biology of the whitebacked planthopper Sogatella furcifera
(Horváth):Case studies in Qianshan, Anhui Province YANG Fan1**ZHENG DaBing1ZHAO Yun1WANG Li1XU YangYang1
QI GuoJun1, 2XU JinFeng3WU CaiLing3ZHANG XiaoXi1
CHENG XiaNian1ZHAI BaoPing1***
（1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；
2Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Guangzhou510640, China；
3Qianshan Plant Protection Stations, Qianshan246300, China）

AbstractThe population dynamics and characteristics of the whitebacked planthopper Sogatella furcifera (Horváth) (WBPH) in a mixed cropping rice region in Qianshan, Anhui Province, were studied through systematic investigation of population density and female ovarian maturity from 2008 to 2010. The main causes for the generational and annual variation in population dynamics were analyzed in combination with data from daily lighttrap catches and field surveys conducted since 2005.The following results were obtained : (1) WBPH had two main density peaks which occur in early August and mid September during the 3rd and 4th generations, respectively. The 3rd generation, which comprises the first peak of infestation, mainly damaged singlecropped rice fields whereas the 4th generation affected doublecropped, lateseason rice fields. (2) The population characteristics of each generation of WBPH in singlecropped midseason rice fields were different from those in doublecropped lateseason rice fields. In the former, most WBPH were residents with some immigrants during the late stage of the 2nd generation and the early stage of the 3rd generation. However, during the late stage of the 3rd generation they were be mostly immigrants with a few residents. In contrast, in doublecropped lateseason rice fields, the population was comprised predominantly of immigrants during the late stage of the 3rd generation and the early stage of the 4th generation. These insects bred and developed before finally emigrating during the late stage of the 4th generation. (3) The number of early immigrants was the key factor determining fluctuations in the abundance of the 2nd and 3rd generation, and the proportion of 3rd generation residents, in single cropped midseason rice, and appears to be the key factor influencing population size in doublecropped lateseason rice fields. Meteorological factors, such as rainfall and temperature, play an important part in determining the emigration or retention of the 3rd generation.
Key wordsSogatella furcifera, ovarian development, dynamics, population characteristics