Assessing effects of esfenvalerate aerosol applications on resident populations of Tribolium castaneum (Herbst), the red flour beetle, through direct and indirect sampling

作者：Arthur F H^*; Campbell J F; Fontenot E A; Toews M D

来源：Journal of Stored Products Research, 2013, 53: 1-6.

DOI：10.1016/j.jspr.2012.12.007

• Red flour beetle
• Tribolium castaneum
• Aerosols
• Insecticide
• Control

Small-scale field sheds were infested to establish resident populations of the red flour beetle, Tribolium castaneum (Herbst), and either left untreated (control) or treated every two or four weeks with an aerosol spray of esfenvalerate (Conquer(R)). Prior to treatments, sheds were infested by placing flour (food) patches underneath shelves in the shed, and two trials were done in separate blocks. Aerosol efficacy was assessed using pheromone traps to estimate live adults (indirect sampling) and by collecting dead adults and estimation of eggs, larvae, pupae, and adults in the food patches (direct sampling). Beetle populations readily colonized the food patches, and overall populations of each life stage in the food patches were similar in the controls and in the 2- and 4-week aerosol treatments. However, the proportion of individuals in the egg and larval stages was greater in the control versus the aerosol treatments. There were more live adults trapped in the controls than in the aerosol treatments, with lower adult numbers in the two-week aerosol spray than in the four-week sprays, and more dead adults in the food patches in the control and 4-week spray than in the 2-week spray. Indirect sampling using pheromone traps gave consistent indications of aerosol efficacy, regardless of the extent of food patch colonization; however; the presence of the food patches allowed continued population development, and as a result the frequency of aerosol application had little impact on T castaneum populations in the food patches. Published by Elsevier Ltd.

• 出版日期2013-4