Investigation of the Natural Enemies of Spodoptera frugiperda and Evaluation of Their Control Effect in Maize Fields in Jiangsu Province

doi:10.16409/j.cnki.2095-039x.2021.03.021

Abstract

Abstract: Jiangsu Province is one of the invasion areas of Spodoptera frugiperda in China. The local potential natural enemies of S. frugiperda in Jiangsu Province and their control of S. frugiperda in maize fields were investigated during August to September 2020 in the main corn planting areas of 8 cities or counties in Jiangsu Province. The results showed that the infestation rate of S. frugiperda to maize plants was more than 50% in all the survey sites. The main species of natural enemies were parasitic wasps (Campoletis chloride; Microgatrinae; Braconidae), entomopathogenic fungi (Beauveria, Metarhizium, Nomuraea rileyi), and ladybugs (Harmonia axyridis; Scymnus (Neopullus) hoffmanni Weise), and many other species of natural enemies such as parasitic flies, bacteria, and viruses. The parasitism rate of parasitic natural enemy insects was between 0% and 24.55%, and the infection rate of entomopathogenic microorganisms was between 2.33% and 56.41%, which shows high potential for preventing and controlling S. frugiperda. Although the occurrence of S. frugiperda in corn fields in Jiangsu Province is serious, the rich resources of natural enemies can provide reliable prevention and control of S. frugiperda.

Key words: Spodoptera frugiperda, natural enemy, parasitic wasp, entomopathogenic microorganisms, biological control

CLC Number:

S476

NIU Hongtao, HU Hui, ZHANG Zhichun, ZHAO Dongxiao, ZHAO Jing, WANG Na, GUO Huifang. Investigation of the Natural Enemies of Spodoptera frugiperda and Evaluation of Their Control Effect in Maize Fields in Jiangsu Province[J]. Chinese Journal of Biological Control, 2021, 37(6): 1152-1159.

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