Hymenopteran parasitoid complex and fall armyworm: a case study in eastern India.

Autor: Pal S; Visva-Bharati University, Santiniketan, Birbhum, West Bengal, 731235, India., Bhattacharya S; Visva-Bharati University, Santiniketan, Birbhum, West Bengal, 731235, India. drbhattacharyaswarnali@gmail.com., Dhar T; Uttar Banga Krishi Viswavidyalaya (UBKV), Pundibari, Coochbehar, West Bengal, 736165, India., Gupta A; ICAR-National Bureau of Agricultural Insect Resources (NBAIR), Bengaluru, Karnataka, 560024, India., Ghosh A; Uttar Banga Krishi Viswavidyalaya (UBKV), Pundibari, Coochbehar, West Bengal, 736165, India., Debnath S; Visva-Bharati University, Santiniketan, Birbhum, West Bengal, 731235, India., Gangavarapu N; Visva-Bharati University, Santiniketan, Birbhum, West Bengal, 731235, India.; University of Nebraska-Lincoln, Lincoln, NE, 68583-0816, USA., Pati P; Visva-Bharati University, Santiniketan, Birbhum, West Bengal, 731235, India.; Siksha 'O' Anusandhan Deemed to be University, Bhubaneswar, Odisha, 751030, India., Chaudhuri N; Uttar Banga Krishi Viswavidyalaya (UBKV), Pundibari, Coochbehar, West Bengal, 736165, India., Chatterjee H; Visva-Bharati University, Santiniketan, Birbhum, West Bengal, 731235, India., Senapati SK; Uttar Banga Krishi Viswavidyalaya (UBKV), Pundibari, Coochbehar, West Bengal, 736165, India., Bhattacharya PM; Uttar Banga Krishi Viswavidyalaya (UBKV), Pundibari, Coochbehar, West Bengal, 736165, India., Gathala MK; International Maize and Wheat Improvement Center (CIMMYT), Dhaka, 1212, Bangladesh., Laing AM; International Maize and Wheat Improvement Center (CIMMYT), Dhaka, 1212, Bangladesh.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Feb 18; Vol. 14 (1), pp. 4029. Date of Electronic Publication: 2024 Feb 18.
DOI: 10.1038/s41598-024-54342-z
Abstrakt: Fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) has significantly affected maize crop yields, production efficiency, and farmers' incomes in the Indian Eastern Gangetic Plains region since it was first observed in India in 2018. A lack of awareness by maize growers of the appropriate selection, method, and timing of insecticide application not only creates a barrier to sustainable FAW control but also contributes to increased environmental pollution, reduced human health and increased production costs. We demonstrated that FAW inflicted the most damage in early whorl growth stage of maize, regardless of whether chemical insecticides were applied. FAW egg masses and larvae collected from maize fields in which no insecticides had been sprayed showed high parasitism rates by parasitoid wasps; in contrast fields that had been sprayed had much lower rates of parasitism on FAW. Ten hymenopteran parasitoids were observed in maize fields across the study region, suggesting a diversity of natural methods to suppress FAW in maize at different growth stages. These included two FAW egg parasitoids and eight FAW larval parasitoids. Microplitis manilae Ashmead was the most abundant FAW larval parasitoid species, and Telenomus cf. remus was the dominant FAW egg parasitoid species. Endemic FAW parasitoids such as those observed in this study have great potential as part of a sustainable, cost-effective agroecological management strategy, which can be integrated with other methods to achieve effective control of FAW.
(© 2024. The Author(s).)
Databáze: MEDLINE
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