Guo Ting-Ting, Li Li-Li, Men Xing-Yuan, Lu Zeng-Bin, Chen Hao, Wang Zhen-Ying, Sun Ting-Lin, Yu Yi
Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan, Shandong, P. R. China.
State Key Laboratory for the Biology of the Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P. R. China.
J Econ Entomol. 2017 Feb 1;110(1):274-281. doi: 10.1093/jee/tow229.
Athetis dissimilis (Hampson) has emerged as a serious pest on corn in recent years in China. Understanding the population response of A. dissimilis to temperature will be beneficial for adopting control strategies for this pest. The impact of five constant temperatures (17, 21, 25, 29, and 33 °C) on the life table of A. dissimilis was studied using age-stage, two-sex life table method in the laboratory. The results showed that the developmental time of egg, larva, pupa, and adult decreased when temperature increased from 17 °C to 33 °C. The TPOP (total preoviposition period) decreased with temperature increasing from 17 °C to 29 °C, while the longest APOP (adult preoviposition period) occurred at 21 °C (3.57 d) and the shortest at 33 °C (2.15 d). The fecundity increased from 407.52 to 763.94 eggs as temperatures were raised from 17 to 25 °C, but decreased at temperatures from 25 °C to 33 °C. The intrinsic rate of increase (r), finite rate of increase (λ), and net reproductive rate (R0) increased as temperatures increased from 17 to 25 °C, then decreased when temperatures exceeded 25 °C. In contrast, the mean generation time (T) decreased as temperatures increased from 17 to 33 °C. Based on the estimated data, the highest female age-stage-specific fecundity (fx) and age-specific fecundity (mx) were 81.91 and 45.04 eggs, respectively, at 25 °C. The age-stage life expectancy (exj) of all stages decreased as the temperature increased. The reproductive value (vxj) increased gradually with age and stage. The developmental rates of A. dissimilis between 17 to 29 °C fit the linear equation y = -0.01315 + 0.001303x, with a coefficient of determination (R2) of 0.9314. In conclusion, our finding clearly states that A. dissimilis has the greatest population increase at 25 °C, and this may help develop appropriate pest management strategies.
异形短须夜蛾近年来在中国已成为玉米上的一种严重害虫。了解异形短须夜蛾对温度的种群响应将有助于采取针对该害虫的防治策略。在实验室中采用年龄-阶段两性生命表方法研究了5个恒温（17、21、25、29和33℃）对异形短须夜蛾生命表的影响。结果表明，当温度从17℃升高到33℃时，卵、幼虫、蛹和成虫的发育时间缩短。总产卵前期（TPOP）随着温度从17℃升高到29℃而缩短，而成虫产卵前期（APOP）最长出现在21℃（3.57天），最短出现在33℃（2.15天）。随着温度从17℃升高到25℃，产卵量从407.52粒增加到763.94粒，但在温度从25℃升高到33℃时下降。内禀增长率（r）、周限增长率（λ）和净增殖率（R0）随着温度从17℃升高到25℃而增加，当温度超过25℃时下降。相反，平均世代时间（T）随着温度从17℃升高到33℃而缩短。根据估计数据，在25℃时，最高的雌虫年龄-阶段特定产卵量（fx）和年龄特定产卵量（mx）分别为81.91粒和45.04粒。所有阶段的年龄-阶段预期寿命（exj）随着温度升高而缩短。繁殖价值（vxj）随着年龄和阶段逐渐增加。异形短须夜蛾在17至29℃之间的发育速率符合线性方程y = -0.01315 + 0.001303x，决定系数（R2）为0.9314。总之，我们的研究结果明确表明，异形短须夜蛾在25℃时种群增长最大，这可能有助于制定合适的害虫管理策略。
