Shelled corn was treated with Spintor 2SC (1 ppm), Actellic 5E (8 ppm), Spintor 2 SC (1 ppm) + Actellic 5E (8 ppm), or left as untreated controls and placed in replicated grain bins. Maize weevil, red flour beetle, flour mill beetle, sawtoothed grain beetle, Angoumois grain moth, and Indianmeal moth were seeded monthly into the bins for the first two months of the study. Insects were sampled by removing grain samples monthly and with sticky traps hung in the bin head space. Laboratory bioassays were conducted with grain removed from the bins monthly as well. Early season populations were small in all treatments. Actellic and combination treatments exhibited the highest mortality of insects followed by Spintor treated grain. No emergence of any insects was observed from any treated grain. Populations will be followed through the storage season.
Species 1: Coleoptera Curculionidae Sitophilus zeamais (maize weevil)
Species 2: Coleoptera Tenebrionidae Tribolium castaneum (red flour beetle)
Species 3: Lepidoptera Pyralidae Plodia interpunctella (Indian meal moth)
Keywords: Stored corn, Spintor 2SC
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