Overlap Effects of Cyromazine Concentration, Treatment Method and Rearing Temperature on Southern Cowpea Weevil Callosobruchus maculatus Reared on Mung Bean
Insect pests of stored products constitute a worldwide problem because they reduce the quantity and quality of stored products. In this study we investigated the interactions between different factors that affect the growth of two successive generations of the southern cowpea weevils, Callosobruchus muculatus (Fab.) (Bruchidae: Coleoptera) reared on mung bean, to find a best conditions to control this pest. These factors include cyromazine concentration, treatment method and breading temperature. Our results showed a variable effect in the reproductive rate of C. muculatus treated with 5% cyromazine concentration using dipping method at 30oC. In addition, increasing cyromazine concentration resulted in decreasing the average of food consumption and increasing the average of generation lifespan. Moreover, seeds treated by dipping method are more protected in comparison with those treated by spraying. The overlap between the three factors had no influence on the sex ratio, but it had an impact on the average weights of males and females reared on a mung bean.
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