The role of some microbial control agents were tested against the insect pests, which infect the cabbage plants in the laboratory, in the green house and in the field. The results showed that the diamondback moth, the cabbageworm and beet armyworm were very susceptible to the microbial control agents used (Bacillus thuringiensis, Beauveria bassiana and Metarhizium anisopilae). The LC50 recorded were 121, 90 and 61 μg mL-1 after treated the piers rapae, Plutella xylostella and Spodoptera exigua with different concentrations of B. thuringiensis, under laboratory conditions, respectively. In addition, the LC50 recorded were 122, 98 and 101 after treatments of the plant in the green house to last insects, respectively. The cabbage pests could be control by the fungi B. bassiana and M. anisopilae under laboratory conditions, in the green house and in the field. The percentage of infestation reached to 20, 15 and 21% of the P. xylostella, P. rapae and S. exigua, respectively after 90 days of treatment with M. anisopilae and 21, 20 and 21% after treatment with B. bassiana to the same last insects after 90 days.
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M.M Sabbour and A.F. Sahab, 2005. Efficacy of Some Microbial Control Agents Against Cabbage Pests in Egypt . Pakistan Journal of Biological Sciences, 8: 1351-1356.
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