Risk analysis of alien invasive Lissorhoptrus oryzophilus in rice producing areas of Guangxi.
Objective: The present study was conducted to analyze the adaptability in China and invasive risk of Lissorhoptrus oryzophilus Kuschel in Guangxi rice producing areas in order to provide references for its control. Method: The distributing adaptability in China and risk analysis in Guangxi of L. oryzophilus was analyzed through DK-GARP model. Result: The results showed that RWW was found to distribute in 20 cities and provinces of Northeast, Northwest, North China, Central China, East China, and Southwest China at present. The main distributing regions of RWW were nearer to the coastal cities and some inland provinces viz., Jilin, Liaoning, Zhejiang, Beijing, Tianjing and Hunan, which were fit for rice production. The neighbor provinces of Guangxi such as Hunan, Yunnan and Guizhou also appeared RWW. The 28 provinces (regions) in China were the high-risk regions of RWW invasion. With the rapid development of economy and international trade and commerce between China and Association of Southeast Asian Nations, the spread paths and opportunity of RWW became more and more. Furthermore, the advantageous geography and weather conditions of Guangxi are much fit for growth and reproduction of L. oryzophilus, Guangxi had become the high-risk spread area of L. oryzophilus. Conclusion: Guangxi must be on the alert and strengthen inspection and quarantine of L. oryzophilus, and should cut off epidemic situation from source in order to prevent L. oryzophilus to invade Guangxi.