Effect of temperature on growth, development and reproduction of Callosobruchus maculatus
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Key Words：Callosobruchus maculatus, temperature, biological traits, growth and development
Abstract：Callosobruchus maculatus Fabricius, a ubiquitously distributed pest, is of great economic significance owing to its capacity of feeding on various legumes. In order to precisely understand the biological traits of C. maculatesand thus provide some theoretical base for the integrated pest management, the biological characteristics of C. maculates on mung bean were systematically studied day by day under the condition of a series of temperatures (20, 25, 28, 32, 35 and 37℃) with a relative humidity of 75%. The results showed that the developmental threshold of egg, larva and immature periods was 12.67, 13.86 and 13.53℃, respectively. It revealed parabola relationship between temperature and both generation survival and finite increase rates. According to the corresponding parabola functions, the optimal temperature for survival and population increase was 30.2 and 33.7℃, respectively, and the optimal temperature range for growth and development of C. maculates was between 30 and 34℃.