Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4505224 | Biological Control | 2007 | 7 Pages |
Abstract
The insecticidal effect of the entomopathogenic fungus Paecilomyces fumosoroseus (Wise) Brown and Smith (Ascomycota: Hypocreales) was evaluated against adults and larvae of the confused flour beetle, Tribolium confusum Jacquelin du Val (Coleoptera: Tenebrionidae) and larvae of the Mediterranean flour moth, Ephestia kuehniella Zeller (Lepidoptera: Pyralidae). The fungus was added in stored wheat at two dose rates, 200 and 400 ppm, at two temperature levels, 20 and 25 °C alone or in combination with the diatomaceous earth formulation SilicoSec®. Mortality of the exposed individuals was measured after 7, 14 and 21 d of exposure. For both T. confusum adults and larvae, mortality was higher at 20 than at 25 °C. In the case of T. confusum larvae, after 14 d of exposure, mortality on wheat treated with the highest dose of P. fumosoroseus with SilicoSec® was significantly higher than that of SilicoSec® or P. fumosoroseus alone. At 20 °C larval mortality was 100% after 21 d of exposure in both fungal doses with SilicoSec®. In contrast, mortality of T. confusum adults was low and did not exceed 34% in any of the treatments tested. Finally, mortality of E. kuehniella larvae did not exceed 56%, while SilicoSec® alone caused higher mortality in comparison with the other treatments.
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Authors
M.P. Michalaki, C.G. Athanassiou, T. Steenberg, C.Th. Buchelos,