Pest Management Science (2015) 71, 1379-1386

Rajeswaran Jagadeesan, Manoj K. Nayak, Hervoika Pavic, Kerri Chandra and Patrick J. Collins (2015)
Susceptibility to sulfuryl fluoride and lack of cross-resistance to phosphine in developmental stages of the red flour beetle, Tribolium castaneum (Coleoptera: Tenebrionidae)
Pest Management Science 71 (10), 1379-1386
Abstract:
BACKGROUND
Our aim was to ascertain the potential of sulfuryl fluoride (SF) as an alternative fumigant to manage phosphine-resistant pests. We tested the susceptibility of all life stages of red flour beetle, Tribolium castaneum (Herbst), to SF and assessed the presence of cross-resistance to this fumigant in phosphine-resistant strains of this species.
RESULTS
Analysis of dose–response data indicated that the egg was the stage most tolerant to SF under a 48 h exposure period. At LC₅₀, eggs were 29 times more tolerant than other immature stages and adults, and required a relatively high concentration of 48.2 mg L^-1 for complete mortality. No significant differences in tolerance to SF were observed among the three larval instars, pupae and adults, and all of these stages were controlled at a low concentration of 1.32 mg L^-1. Phosphine-resistant strains did not show cross-resistance to SF.
CONCLUSION
Our research concluded that the current maximum registered rate of SF, 1500 gh m^-3, is adequate to control all the post-embryonic life stages of T. castaneum over a 48 h fumigation period, but it will fail to achieve complete mortality of eggs, indicating the risk of some survival of eggs under this short exposure period. As there is no cross-resistance to SF in phosphine-resistant insects, it will play a key role in managing phosphine resistance in stored-grain insect pests.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Patrick J. Collins, Manoj K. Nayak

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tribolium castaneum