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Competitive interactions of a new invader (Spodoptera frugiperda) and indigenous species (Ostrinia furnacalis) on maize in China

文献类型： 外文期刊

作者： Zhao, Jing 1 ; Hoffmann, Ary 3 ; Jiang, Yiping 1 ; Xiao, Liubin 1 ; Tan, Yongan 1 ; Zhou, Changyong 4 ; Bai, Lixin 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing, Peoples R China

2.Jiangsu Acad Agr Sci, Key Lab Food Qual & Safety Jiangsu Prov, State Key Lab Breeding Base, Nanjing, Peoples R China

3.Univ Melbourne, Sch BioSci, Bio21 Inst, Pest & Environm Adaptat Res Grp, Melbourne, Vic, Australia

4.Huai Yin Inst Agr Sci Xuhuai Regionin Jiangsu, Huaian, Peoples R China

关键词： Competitive interaction; Fall armyworm; Maize borer; Ethogram; RCC value

期刊名称：JOURNAL OF PEST SCIENCE （ 影响因子：5.918； 五年影响因子：5.955 ）

ISSN： 1612-4758

年卷期：

页码：

收录情况： SCI

摘要： Spodoptera frugiperda has been reported in China since the beginning of 2019, threatening maize production and raising questions about interactions with indigenous pests on maize. Spodoptera frugiperda is in the same feeding guild as the indigenous species Ostrinia furnacalis, with both pests attacking maize plant tissues such as whorls and tassels. In this study, the interaction of these species was assessed under laboratory and field conditions by examining the survival and predation rate of larvae in maize whorls and tassels. Intraspecific and interspecific interactions of larvae were assessed to characterize movements in arenas in the presence and absence of food. When S. frugiperda and O. furnacalis were present at an equal ratio, S. frugiperda prevailed over O. furnacalis with a high survival rate (over 90%) and predation rate of O. furnacalis (over 40%) under most scenarios in both laboratory and field conditions. When both species occurred at different ratios in the field, S. frugiperda had on average almost 16 times the number of survivors as O. furnacalis on whorls, and 8.3 times the number on tassels, highlighting a substantial advantage in these environments. Spodoptera frugiperda larvae undertook a low frequency of lethal attacks (strikes) and showed a higher incidence of defensive movements compared to O. furnacalis. A field survey showed that S. frugiperda larvae can colonize vegetative plant stages in maize, but it remains to be seen if competitive interactions can be linked to population dynamics of both species though they are expected to favor S. frugiperda.

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