Source areas and landing mechanisms of early immigrant population of white-backed planthoppers Sogatella furcifera (Horváth) in Shizong, Yunnan Province

Abstract

From April to May, 1990-2012, the source areas of early immigration of white鄄backed planthoppers Sogatella furcifera (Horv佗th) (WBPH) were studied through the analysis on the daily light鄄trap catches, immigration trajectory simulation and horizontal wind field. The following results were obtained: The high frequency of westerly wind carried the large population of WBPH to Shizong in late April. The source areas were mainly located in northeastern Myanmar and the secondary source areas were at northern Vietnam and Golden Triangle. Airborne WBPH populations were carried by a strong, low鄄level, southwest jet鄄stream in May and the mass immigration of WBPH into Shizong during early and middle May was found form northern Laos, northwestern Vietnam and Southwestern Yunnan, and some immigrants from northeastern Myanmar. Most of the immigrants in late May were tracked to Southwestern Yunnan, and part of immigrants to northwestern Vietnam, northern Laos and northeastern Myanmar. Based on the analysis on the meteorological background and rainfall distribution, it was found that the extensive heavy rainfall in southeastern Yunnan during late April to May and http: / / www.ecologica.cn low temperature shield of surrounding to flying WBPH and the wind shear associated with heavy precipitation were the key factors to affect the concentrated landing of WBPH.

Phylogeographic structure and putative migration pathway of Sogatella furcifera in China based on microsatellite markers

“…The white‐backed planthopper (WBPH), Sogatella furcifera (Horváth) (Hemiptera: Delephacidae), is one of the most destructive rice pests throughout South and East Asia (Otuka, 2013). It is an oligophagous insect and has high fecundity and long‐distance flight capabilities (Zheng et al., 2014). The adults and nymphs of WBPH not only directly injure rice plants by sap‐sucking and ovipositing in rice tissues, weakening plant vigor, delaying tillering, stunting, yellow leaves and shrivelling grain but also cause further damage by transmitting the southern rice black‐streaked dwarf virus (SRBSDV) (Su et al., 2013; Zhou et al., 2013).…”

The Genetic Diversity of White-Backed Planthoppers (Sogatella furcifera) between Myanmar and Yunnan Province of China

“…However, by mid-May, it is confirmed that the main source of these migrating insects is the northern regions of Vietnam. This migration process is, to some extent, influenced by the seasons and climate, forming an organized and sustained migration chain [15,17]. Despite some evidence based on molecular marker analysis [18,19], our understanding of the genetic flow and migration patterns of the WBPH between Myanmar and Yunnan Province, China remains limited.…”