The occurrence characteristics and population dynamics ofSogatella furcifera (Horváth) inYunnanProvince
Author of the article:ZHAO Xue-Qing1 SHEN Hui-Mei1 YIN Yan-Qiong1 LI Xiang-Yong1Lü Jian-Ping2 CHEN Ai-Dong1**
Author's Workplace：1. Institute of Agricultural Environment and Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205, China;2. Yunnan Province Plant Protection and Quarantine Station, Kunming 650034, China
Key Words：Sogatella furcifera, occurrence, population dynamics,Yunnan
Abstract： [Objectives] The objective of this study was to investigate the occurrence characteristics and damage caused by Sogatella furcifera (Horváth) inYunnanProvinceto provide a basis for the effective control of this pest. [Methods] In 2010-2011, the population occurrence and dynamics of S. fuercifera were systematically studied in the field using light-trap collection in six major rice growing areas inYunnan, including the west, southwest, south, southeast, east, and northeast. [Results] The results show that the size of the overwintering population was smaller than in other seasons and its distribution was different in six major rice farming areas of Yunnan; mostly concentrated on rice stubble, ratooning rice and rice seedlings in wet paddy fields at latitudes south of N 23°55'164" and altitudes below 1 369 m. Moreover, the overwintering population of S. furcifera in the south and southeast ofYunnanwas more abundant than that in the west and southwest. Light-trapping indicated that the beginning of the migration period of S. furcifera was from early March to late May in the west, early March in the southwest, and middle to late May in the northeast. The migration period of S. furcifera was progressively later from the west to the southwest, south, southeast, east, and northeast. Adult numbers captured by light-trapping were lower in the southwest than the southeast and the peak immigration dates were mainly in May, June and July. The return migration peak occurred from late September to middle October. Population peaks occurred in the southwest and south from the end of April to June, in the southeast and east from late May to early July, and in the northeast from late June to July. [Conclusion] S. furcifera mostly occurs in the south, southeast and southwest ofYunnanin May, June and July.