Sublethal phosphine fumigation induces transgenerational hormesis in a factitious host, Corcyra cephalonica

Sublethal phosphine fumigation induces transgenerational hormesis in a factitious host, Corcyra cephalonica

BACKGROUND The rice moth, Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae) is a pest of stored grains and widely used as a factitious host during the mass rearing of several natural enemies of crop pests. Hormesis is well‐documented in pest insects, to some extent in natural enemies of pests....

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Published in:Pest management science Vol. 79; no. 10; pp. 3548 - 3558
Main Authors: Nath, Anshuman, Gadratagi, Basana Gowda, Maurya, Ravi Prakash, Ullah, Farman, Patil, Naveenkumar B, Adak, Totan, Govindharaj, Guru Pirasanna Pandi, Ray, Aishwarya, Mahendiran, Annamalai, Desneux, Nicolas, Chandra Rath, Prakash
Format: Journal Article
Language:English
Published: Chichester, UK John Wiley & Sons, Ltd 01-10-2023
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Subjects:
Agricultural sciences
Agronomy
biological traits
Carbohydrates
Corcyra cephalonica
Fumigation
Grain storage
Hatchability
Hormesis
Insecticides
Insects
Intestinal microflora
Life Sciences
Lipids
Mass rearing
Metagenomics
metagenomics sequencing
Microbiomes
Microorganisms
Natural enemies
Nutrient reserves
Pests
Phosphine
Phosphines
Proteins
Reserves
rRNA
stimulatory effects
sublethal
metagenomics sequencing
phosphine
biological traits
sublethal
stimulatory effects
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Summary:BACKGROUND The rice moth, Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae) is a pest of stored grains and widely used as a factitious host during the mass rearing of several natural enemies of crop pests. Hormesis is well‐documented in pest insects, to some extent in natural enemies of pests. RESULTS We report transgenerational stimulatory effects of the widely used fumigant, phosphine. The study reports the consequences of sublethal, low lethal and median lethal concentrations (LC5, LC25 and LC50) and untreated control for two sequential generations of the species (G1 to G2). In this study, we investigated the life‐history traits, nutrient reserves (protein, lipid and carbohydrate) and larval gut microbiome (using 16 s rRNA V3–V4 metagenomics sequencing) of C. cephalonica. Stimulatory effects were observed for various biological traits of C. cephalonica, notably adult longevity, emergence and increased egg hatchability when exposed to LC5 of phosphine. The total protein, lipid and carbohydrate contents of C. cephalonica also were found to be significantly increased by LC5 in both generations. The microbial diversity of LC5 treated larval gut was higher and found to be different from the rest of the treatments. This is the first report showing hormesis to a fumigant insecticide. CONCLUSION Our findings increase knowledge on the interaction between hormesis, nutrient reserves and gut bacteria in C. cephalonica exposed to insecticides. Overall, the present study establishes phosphine‐induced hormesis at LC5 in the host C. cephalonica, which might help improve the quality of mass rearing of various natural enemies. © 2023 Society of Chemical Industry. Sublethal phosphine application induced transgenerational hormesis at LC5 in the host C. cephalonica, which could be leveraged for quality mass rearing of various natural enemies.
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ISSN:1526-498X
1526-4998
DOI:10.1002/ps.7542