Effect of certain biocontrol agents on the red flower beetle tribolium castaneum (Herbst) [electronic resource].

Includes references.

The effect of diet treatment with lupine (Lupinus termis) and parsley (Petroselinum crispum) and Dipel 2XWP (Bacillus thuringiensis Berliner, var. tenebrionis) powders on population of the red flour beetle, Triholium castaneum (Herbst) was investigated. Crushed grains are mixed with different concentration the powders at 8,4 and 2% (w/w) for L. termis and P. crispum and at 2, I and 0.5% for Dipel 2XWP.. The results indicated that addition of L. termis seeds powder to the diet of T. castaneum at 8, 4 and 2% concentrations showed an obvious reduce in the adul t populations during the first five months of rearing for the treated diet as compared with the untreated one. Also, it was found that the rate of growth of T. castaneum was slightly lower at 8 and 4% concentrations as compared with untreated diet. Also, in case ofL. termis and B. t. powder, mortality of T. castaneum adults dUring the first two weeks of treatment increased with time lapses and concentration. Treatment of P. crispum powder to the diet of T. castaneum at 8, 4 and 2% concentrations gave the highest mortality rates at 14 days from treatment and induced an obvious sharp decrease in the adult populations during the first two months from treatment. At the same time, P. crispum seeds powder gave complete protection to wheat grains against this insect species up to 9 months. So, it can be recommended to use P. crispum powder as grain protectant against T. castaneum, which it is mainly safe for humans,

Summary in Arabic.

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