Residual efficacy of synergized pyrethrin + methoprene aerosol against larvae of Tribolium castaneum and Tribolium confusum (Coleoptera: Tenebrionidae)

2011 ◽  
Vol 47 (4) ◽  
pp. 399-406 ◽  
Author(s):  
A.E. Sutton ◽  
F.H. Arthur ◽  
K.Y. Zhu ◽  
J.F. Campbell ◽  
L.W. Murray
Keyword(s):  
Tribolium Castaneum ◽  
Tribolium Confusum ◽  
Residual Efficacy ◽  
Coleoptera Tenebrionidae

Sampling Tribolium confusum and Tribolium castaneum in mill and laboratory settings: differences between strains and species

2011 ◽  
Vol 143 (5) ◽  
pp. 504-517 ◽  
Author(s):  
Karen J. Hawkin ◽  
Dean M. Stanbridge ◽  
Paul G. Fields
Keyword(s):  
Tribolium Castaneum ◽  
Tribolium Confusum ◽  
Pitfall Traps ◽  
Trap Catch ◽  
Flour Mill ◽  
Burrowing Behaviour ◽  
Coleoptera Tenebrionidae

AbstractThe efficacy of pitfall traps baited with pheromone and cereal oil in capturing Tribolium confusum Jacquelin du Val and T. castaneum (Herbst) (Coleoptera: Tenebrionidae) was low (trap catch) in mill and simulated warehouse settings. In a simulated warehouse experiment, strains of Tribolium Macleay recently taken from mills were caught 24% less often in traps than were laboratory strains, and T. confusum was caught 40% less often than T. castaneum. Both species were found together in all flour samples taken from a Canadian flour mill. A comparison of the species ratio in flour samples with that found in traps revealed that T. confusum was caught less often in traps than was T. castaneum. In flour, T. castaneum burrowed more than did T. confusum, and there were differences in burrowing behaviour between the four T. castaneum strains. Mills infested with T. confusum may have higher levels of infestation than was previously thought, indicating that further research into beetle behaviour in mills is needed.

scholarly journals Effects of Aerosol Insecticide Application Location on the Patterns of Residual Efficacy Against Tribolium confusum (Coleoptera: Tenebrionidae) Larvae

2020 ◽  
Vol 113 (4) ◽  
pp. 2007-2015
Author(s):  
Deanna S Scheff ◽  
James F Campbell ◽  
Frank H Arthur ◽  
Kun Yan Zhu
Keyword(s):  
Spatial Pattern ◽  
Adult Emergence ◽  
Insect Growth Regulator ◽  
Tribolium Confusum ◽  
Spatial Coverage ◽  
Residual Efficacy ◽  
Efficacy Index ◽  
And Storage ◽  
Confused Flour Beetle ◽  
Coleoptera Tenebrionidae

Abstract Aerosol insecticides are one tool that pest management professionals can utilize as a spatial treatment inside food facilities and storage warehouses. Methods of aerosol application can vary significantly and can affect the spatial pattern of efficacy achieved. We investigated how the location from which an aerosol insecticide is applied inside a mill influenced the spatial dispersal of the insecticide. Treatments were performed using two commercial formulations, pyrethrin + pyriproxyfen (insect growth regulator [IGR]) and pyrethrin + methoprene (IGR), applied at one of three static locations or a fourth application comprising of splitting the application among all three locations. Concrete arenas were placed out at different locations within the mill during applications. At 2, 4, and 6 wk post-aerosol application, Tribolium confusum Jacquelin du Val, confused flour beetle, larvae were added to the concrete arenas and monitored for development and efficacy was evaluated based on percent adult emergence and an efficacy index that ranged from 1 (low) to 21 (high). The spatial pattern of aerosol coverage varied between insecticide formulations and the aerosol application location. Areas of the mill near walls, corners, equipment, and farthest away from the application location had larger zones of low efficacy index values among all four application locations. This study illustrated that the aerosol insecticide formulation, application location, and delivery method all significantly influenced residual efficacies of the insecticides. To increase the overall spatial coverage and IGR efficacy, targeting these areas of a mill floor with the aerosol or additional intervention techniques would increase uniform coverages and overall effectiveness.

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