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Natural mortality of invasive fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in maize agroecosystems of northeast India.

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Title Natural mortality of invasive fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in maize agroecosystems of northeast India.
Not Available
 
Creator D.M. Firake.
G.T. Behere.
 
Subject Metarhizium rileyi, SpfrNPV, Chelonus, Microplitis, Hexamermis, Generalist predators, Entomopathogen, Diversity indices
 
Description Not Available
Invasive fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) is a pest of American origin that has recently invaded Asian countries, including India. After causing huge losses in the Africa and Asia, the FAW is now affecting large areas of India. Indigenous natural enemies of related pest species are the first defense against invasive pests and understanding their role in population suppression of invasive pests is a first step towards the development of a comprehensive management program. Therefore, we studied the natural enemy complex responsible for natural mortality of FAW in northeast India. Various locations were surveyed across five major districts of Meghalaya state, where more than 26 species of natural enemies were found attacking FAW. A total of 56.6% to 73.1% of larvae were found to be either parasitized or infected with naturally occurring entomopathogens. Species richness and diversity of predators were determined in maize fields at different locations. Values of Menhinick's species richness index (DMn) varied from 0.23 to 0.31 and Shannon-Wiener index (H) ranged from 2.16 to 2.6 across various locations. The Simpson Index (D) indicated high predator diversity in maize fields. The entomopathogenic fungus, Metarhizium rileyi (Farlow) Samson and the baculovirus, SpfrNPV were observed to be the dominant mortality factors throughout the season, responsible for >50% mortality of FAW larvae. This investigation demonstrated that indigenous natural enemies of related noctuid species can widen their host range and successfully adopt the invasive FAW as a novel host/prey in invaded regions. Therefore, conservation of such biocontrol agents could be vital for mitigating FAW damage in maize agroecosystems.
ICAR Research Complex for NEH Region, Umiam, Meghalaya
 
Date 2021-04-16T04:13:35Z
2021-04-16T04:13:35Z
2020-05-18
 
Type Research Paper
 
Identifier 2. Firake D. M. and Behere G. T. (2020) Natural mortality of invasive fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in maize agroecosystems of northeast India. Biological Control, 148: 104303. https://doi.org/10.1016/j.biocontrol.2020.104303.
https://www.sciencedirect.com/science/article/pii/S1049964420300335
http://krishi.icar.gov.in/jspui/handle/123456789/46486
 
Language English
 
Relation Not Available;
 
Publisher Elsvier