Evaluations of the new deltamethrin-treated all-in-one hermetic bag for the control of the Khapra beetle, Trogoderma granarium (Everts). (September 2021)

• Record Type: Journal Article
• Authors: Scheff, Deanna S.; Baliota, Georgia V.; Domingue, Michael J.; Bingham, Georgina V.; Morrison, William R.; Athanassiou, Christos G.
• Is Part Of: Journal of stored products research. Volume 93(2021)
• Publication Date: 2021-09
• Subjects: Khapra beetle -- Hermetic bags -- Deltamethrin packaging -- Grain quality -- Stored product insects; Food -- Storage -- Periodicals; Farm produce -- Storage -- Diseases and injuries -- Periodicals; Entomology -- Periodicals; Food Contamination -- Periodicals; Food Preservation -- Periodicals; Insect Control -- Periodicals; Aliments -- Entreposage -- Périodiques; Produits agricoles -- Entreposage -- Maladies et dommages -- Périodiques; Electronic journals; 631.568
• DOI: 10.1016/j.jspr.2021.101839
• Languages: English
• ISSNs: 0022-474X

Abstract

Abstract: The khapra beetle, Trogoderma granarium (Everts), is a highly destructive stored product insect that presents a significant threat to stored bagged grain. Hermetic packaging is designed to maintain the quality and safety of stored grain, while continually protecting the grain from insect infestations during storage. The objective of this research was to evaluate a prototype deltamethrin, all-in-one treated hermetic bag on contact efficacy, larval mobility, and the control of T. granarium in artificially infested wheat. The insecticidal activity of the deltamethrin-treated packaging was tested against larvae and adults of T. granarium through contact bioassays. There was a significant reduction in responsive adults after 5 day and >86% of larvae were unresponsive after 9 d of exposure on the treated bag. Trogoderma granarium movement toward a food bait was <10% after a 24 h exposure on the treated bag compared to ~45% of larvae on untreated bag. Lots of 15 kg of wheat were artificially infested with 100 T. granarium larvae and placed inside treated and untreated storage bags, sealed, and stored in a semi-field warehouse, and observed after 2, 6, and 8-weeks for T. granarium survival and grain quality attributes. The weight and number of insect damaged kernels was lower across all storage intervals for grain held in the treated bags, as compared with control bags. Live adult T. granarium were observed at 2-weeks in treated and untreated bags, but there were no live adults observed after 8-weeks of storage in both bags. The new prototype hermetic bags maintained positive grain qualities, however more information on the hermetic parameters are needed to understand how some individuals survived. Highlights: A new deltamethrin treated hermetic bag was evaluated for control of khapra beetle. The treated bag reduced larval movement after 24 h. Contact bioassays resulted in >86% larval and adult mortality. Treated bags reduced the number of insect damaged kernels, grain dust and frass.