Population dynamics and source areas of the white-backed planthopper Sogatella furcifera (Horváth) in Menghai,Yunnan province
Author of the article:TIAN Wei-Kui； LI Chao-Jiang；WU Yan
Author's Workplace：Guizhou Provincial Key Laboratory for Rare Animal and Economic Insect of the Mountainous Region, Guiyang University, Guiyang 550005, China; Menghai Plant Protection and Quarantine Station, Menghai 666200, China; 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), Nanjing 210095, China; Xishuangbanna Plant Protection and Quarantine Station, Jinghong 666100, China
Key Words： Sogatella furcifera, source area, ovarian anatomy, population dynamic, population characteristics
Abstract： [Objectives] The white-backed planthopper (WBPH, Sogatella furcifera (Horváth)) is an important migratory pest in the Menghai rice-growing region where it poses a major threat to rice production. To clarify factors affecting the abundance of the migratory population, and thereby provide a scientific basis for forecasting outbreaks, we investigated the population dynamics of the Menghai WBPH population and identified its source areas. [Methods] The NOAA ARL HYSPLIT model and GrADS and meteorological baseline data collected during peak light trapping periods from 2000 to 2016 were used to identify source areas of the immigrant population. Systematic field investigations and dissection of the ovaries of adult females were used to investigate the population dynamics and characteristics of different generations of WBPH at Menghai in 2013. [Results] Most Menghai WBPH come from central Myanmar with a minority of immigrants coming from south Myanmar and the Golden Triangle in April. In May, most Menghai WBPH come from eastern Myanmar with some from northern Thailand, Laos and Vietnam. The usual weather conditions associated with peak light-trap captures are wind shear, downward air-flow, a low temperature barrier and precipitation. The generation that causes the most damage to early rice crops in Menghai is the second-generation which occurs from mid-April to mid-May. [Conclusion] The results of this study identify the source of early WBPH immigrants and the generation that does the most damage to rice crops. This provides a scientific basis to support local prevention and forecasting in different areas affected by this pest.