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The study was conducted on a group of adults of Pentodon bispinifrons Reitter, as it was treated by Nogos at three concentrations (5, 10, 15) ppm and Beauveria bassiana fungus under the influence of three different temperatures: 10, 20 and 30 °C. The results showed that the insect killing rates remained low at the three temperatures when using the...
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Context 1
... is one of the determining factors for growth and development of insects in general, and the use of control, whether chemical or biological, is largely determined by the climate, temperature and timing (Arnold, 1960). Figure (1) shows the treatment of a group of scarab beetles were treated with Nogos at three concentrations are (5,10,15) ppm and at a temperature of 10 °C. Figure (4) where it was treated repeater from the beetle insects by B. bassiana fungus and at a temperature of 10 °C, we will find that the killing percentages were low and did not increase significantly, after ten days of treatment the killing rates remained low for both Nogos and the fungus extract where did not exceed 20%. For Nogos, this indicates that the pesticide is ineffective in low temperature conditions, as well as for the fungus extract, as the killing rate in this temperature is very low and the reason may be that the B. bassiana is idle at low temperatures, and it is unable to penetrate the insect's body to cause injury (Ekesi et al., 1999). ...
