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1978—1988年,在湖北省江汉平原棉区,用编制特定年龄生命表的方法,研究棉红铃虫Pectimophora gossypiella(Saunders),第1至3代的自然种群生命统计特征值。世代存活率(S)为3.23、4.01和1.46;各虫态发育阶段(X)与相应阶段存活率的关系为:Y_1=61.66e~(-0.58#)、Y_2=142.47e~(-0.73#)、Y_3=146.68e~(-0.0(?)#);种群趋势指数(I):1.12、2.03和0.45;每雌蛾平均及最高产卵量:35(253)、51(235)、31(293)粒;自然内禀增长率(r′(?))为0.0390、0.0403和0.0026;净增殖率(R_o):4.39、4.43和2.04;周限增长率(λ):1.0398、1.0411和1.0026;世代长度(T):38、37和276日;种群加倍时间(t)18、17和267天。上列十个生命统计值已成为组建棉红铃虫的计算机辅助决策模型所必须的基质。第二代是全年的关键世代,各代钻蛀期的幼虫数及越冬期的幼虫数是影响下一世代或次年种群数量的关键虫态,钻蛀期幼虫的自然死亡是致死的主导因子。
From 1978 to 1988, the life statistics of natural populations of Pectimophora gossypiella (Saunders) from the 1st to 3rd generations were studied in the Jianghan plain cotton area of Hubei Province by using the method of compiling the life table of specific age. The survival rates (S) of the three generations were 3.23, 4.01 and 1.46 respectively. The relationship between the developmental stages (X) and the corresponding survival rates was as follows: Y_1 = 61.66e ~ -0.58 #, Y_2 = 142.47e ~ ), Y_3 = 146.68e ~ (-0.0 (?) #); Population trend index (I): 1.12,2.03 and 0.45; Average and maximum fecundity per female: 35 (253), 51 (293), the intrinsic rate of natural increase (r ’(?)) Was 0.0390, 0.0403 and 0.0026, the net proliferation rate was 4.39, 4.43 and 2.04, respectively. ; Generation length (T): 38, 37 and 276 days; Population doubling time (t) 18, 17 and 267 days. The above ten vital statistics have become the necessary matrix for the computer-aided decision-making model of cotton bollworm. The second generation is the key generation throughout the year. The number of larvae at each mulching stage and larvae overwintering are the key insect states that affect the population of the next or next year. The natural death of the larvae during drilling is the leading cause of lethality factor.