Synergistic effects of the entomopathogenic fungus Isaria javanica and low doses of dinotefuran on the efficient control of the rice pest Sogatella furcifera  

作　　者：Tingting Zhou Qian Zhao Chengzhou Li Lu Ye Yanfang Li Nemat OKeyhani Zhen Huang 

机构地区：[1]Department of Entomology,College of Plant Protection,South China Agricultural University,Guangzhou 510642,China [2]Guangdong Provincial Key Laboratory of High Technology for Plant Protection,Plant Protection Research Institute,Guangdong Academy of Agricultural Sciences,Guangzhou 510642,China [3]Department of Microbiology and Cell Science,Institute of Food and Agricultural Sciences,University of Florida,FL 32611,USA

出　　处：《Journal of Integrative Agriculture》2024年第2期621-638,共18页农业科学学报（英文版）

基　　金：funded by grants from the Science and Technology Planning Project of Guangzhou,China(202002020029);the Science and Technology Planning Project of Guangdong Province,China(2019B020217003);the National Key R&D Program of China(2018YFD02003);the National Key Technology Support Program of China(201303019-02)。

摘　　要：The rice planthopper,Sogatella furcifera,is a piercing-sucking insect pest of rice,Oryza sativa.It is responsible for significant crop yield losses,and has developed moderate to high resistance to several commonly used chemical insecticides.We investigated the effects of the insect fungal pathogen Isaria javanica,alone and in combination with the chemical insecticide dinotefuran,on S.furcifera under both laboratory and field conditions.Our results show that I.javanica displays high infection efficiency and mortality for different stages of S.furcifera,reducing adult survival,female oviposition and ovary development.Laboratory bioassays showed that the combined use of I.javanica with a low dose(4-16 mg L^(-1))of dinotefuran resulted in higher mortality in S.furcifera than the use of I.javanica or dinotefuran alone.The combined treatment also had more significant effects on several host enzymes,including superoxide dismutase,catalase,peroxidase,and prophenol oxidase activities.In field trials,I.javanica effectively suppressed populations of rice planthoppers to low levels(22-64%of the level in untreated plots).Additional field experiments showed synergistic effects,i.e.,enhanced efficiency,for the control of S.furcifera populations using the combination of a low dose of I.javanica(1×10^(4) conidia mL^(-1))and a low dose of dinotefuran(~4.8-19.2%of normal field use levels),with control effects of>90%and a population level under 50 insects per 100 hills at 3-14 days post-treatment.Our findings indicate that the entomogenous fungus I.javanica offers an attractive biological control addition as part of the integrated pest management(IPM)practices for the control of rice plant pests.

关 键 词：Isaria javanica Sogatella furcifera entomopathogenic fungus white planthopper RICE synergistic effect on pest control 

分 类 号：S435.11[农业科学—农业昆虫与害虫防治]