Effects Of Storage Temperature On The Development Of Mung Bean Population

The growth and development of Callosobruchus chinensis was investigated in laboratory under the condition of 20, natural condition, 28, 32 with(70±5) % relative ℃humidity. The relationship between the storage temperature and the growth and development of C. chinensis Linnaeus in mung beans, the relationship between the starvation, growth, development, breeding of the C. chinensis Linnaeus under the temperatures were studied in the paper. The main results are as follows.1. The results showed that, at the range of 20~32℃, the starvation tolerance of C. chinensis adults were increased with the decreasing temperature, and that there were significant differences at different treatment temperatures. Under the condition of same processing temperature, these females starvation tolerance is greater than the male, but the difference was not significant. At 20℃, the C. chinensis adults exhibited the strongest starvation tolerance, and the average starvation tolerance period was 26.73 d for females and 21.93 d for males. The longest individual period of starvation tolerance was 36.00 d for females and 31.00 d for males. At 32℃, the C. chinensis adults showed the shortest starvation tolerance, and the average starvation tolerance period were 8.80 d for females and 8.53 d for males.2. Temperature was an important influence on the population development and reproduction of C. chinensis. Under the texted temperatures, the developmental duration of the immature C. chinensis shortened as the temperature increased. At the natural conditon of average 24.2℃, the rate of emergence could reach 96.67%, and the minimum was 46.67% at 28℃. There were significantly difference among the results under these three temperatures. The developmental threshold temperature for C. chinensis was 14.5455℃, and the effective accumulated temperature was 360.1341 day-degrees. At 20℃, the adult has the longest life, longest spawning time and the highest fecundity. At 32℃, the females laying eggs was minimum. The net reproductive rate(R0) of C. chinensis ranged highest at 28℃, the following one at 20℃, and the lowest at 32℃. The intrinsic rate of increase(rm) and finite rate of increase(λ) of C. chinensis increased with the increasing treatment temperatures. The mean generation time(T) and double population time(t) of C. chinensis decreased with the increasing treatment temperatures.3. The growth of C. chinensis population followed the equation y = 0.7556e(0.0484x)(R2 = 0.9276) at 20℃, y = 1.1E-5x4.0689(R2 = 0.9575) under the natural condition, y = 16.024x- 435.75(R2 = 0.9554) at 28℃, and y = 18.916x– 546.33(R2 = 0.9349) at 32℃.