Effects of temperature on Brontispa longissima population growth

Abstract

Abstract: The study on the development,survival and reproduction of Brontispa longissima at 5 different temperature (16,20,24,28,32 ℃) showed that the threshold temperature and effective accumulative temperature for the whole generations of Brontispa longissima were 11.08 ℃ and 966.22 ℃,respectively,and 4～5 generations could occur in a year in Danzhou,Hainan Province.One generation had the highest survival rate (92.5%) at 28 ℃,but failed to survive at 32 ℃.Brontispa longissima reared at 28 ℃ had the greatest intrinsic increasing rate (r_m=0.0260),finite increasing capacity (λ=1.0263),and population trend index (I=50.8).The shortest mean generation time (123.1 d) and population doubling time (26.7 d) were obtained at 20 ℃ and 28 ℃,respectively.The temperature from 24 ℃ to 28 ℃ was suitable for the development and reproduction of Brontispa longissima.

Key words: Brontispa longissima, Experimental population, Temperature, Life table, Population parameter

CLC Number:

Q968.1

ZHONG Yihai, LI Hong, LIU Kui, WEN Haibo, JIN Qi'an, PENG Zhengqiang . Effects of temperature on Brontispa longissima population growth[J]. Chinese Journal of Applied Ecology, 2005, 16(12): 2369-2372.

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