Life table and population parameters of sorghum aphid (Melanaphis sacchari) under different temperatures

doi:10.3969/j.issn.1004-1524.2018.09.14

›› 2018, Vol. 30 ›› Issue (9): 1541-1547.DOI: 10.3969/j.issn.1004-1524.2018.09.14

• Plant Protection • Previous Articles Next Articles

Life table and population parameters of sorghum aphid (Melanaphis sacchari) under different temperatures

WU Degong, DU Junli^*, HUANG Baohong, ZHAN Qiuwen, BI Yaling, HUANG Weidong, LIU Yanlong

College of Agriculture, Anhui Science and Technology University, Fengyang 233100, China

Received:2017-12-18 Online:2018-09-25 Published:2018-10-15
Contact: 杜军利,E-mail: adu83419@163.com
Supported by:
安徽科技学院人才引进项目(ZRC2014399); 安徽省教育厅重点项目(KJ2016A825); 安徽省级草学学科建设重大项目(皖教秘科〔2014〕28号); 国家自然科学基金(31301383); 2018年安徽省高校优秀青年骨干人才国内访问研修项目(gxgnfx2018021); 安徽科技学院植物保护重点学科经费资助项目(AKZDXK2015C04); 安徽省省级质量工程项目植物保护特色专业专项(2015tszy022)

Abstract

Abstract: The life table construction technique was used to study the effects of different temperatures (12, 15, 18, 21, 24, 27, 28 ℃) on the life parameters of the sorghum aphid population. The results showed that the developmental times of nymphs and adult longevity of Melanaphis sacchari decreased significantly as constant temperature increased. The average development period of the nymphs of sorghum aphid was 18.32 d at 12 ℃, 5.04 d at 28 ℃, and 3.63 times the difference between the two. The average longevity of adults was 56.42 d at 12 ℃, 18.23 d at 28 ℃, and 3.09 times the difference between the two. The intrinsic rate of increase (r_m), net reproductive rate (R_o), finite rate of increase (λ), mean generation time (T) and double population time (t) were also significantly different under different temperatures. The intrinsic rate of increase (r_m), net reproductive rate (R_o), finite rate of increase (λ) reached the highest at 24 ℃, as the temperature increased or decreased, the intrinsic rate of increase (r_m), net reproductive rate (R_o), finite rate of increase (λ) all decreased. The intrinsic rate of increase (r_m) and finite rate of increase (λ) were the lowest at 12 ℃, which were 0.126 and 1.134, respectively. The lowest net reproductive rate (R_o) at 28 ℃ was 31.04. The double population time (t) was the shortest at 24 ℃ and the longest at 12 ℃.The mean generation time (T) became shorter with temperature, 33.32 d at 12 ℃ and 12.02 d at 28 ℃. In summary, the temperature had a significant effect on the growth and development of sorghum apid, and the growth and development of sorghum aphid were inhibited and the development was slow at low and high temperatures. 24 ℃ was the optimum growth temperature for sorghum aphid, at this temperature, the intrinsic growth rate of sorghum aphid was high, the generation cycle was short, and the population increased rapidly. These results would help us understand the population dynamics of sorghum aphid on sorghum plants, and lay a solid foundation for the prediction of sorghum aphid.

Key words: Melanaphis sacchari, life table, developmental duration, intrinsic rate of increase

CLC Number:

S433

WU Degong, DU Junli, HUANG Baohong, ZHAN Qiuwen, BI Yaling, HUANG Weidong, LIU Yanlong. Life table and population parameters of sorghum aphid (Melanaphis sacchari) under different temperatures[J]. , 2018, 30(9): 1541-1547.

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Life table and population parameters of sorghum aphid (Melanaphis sacchari) under different temperatures

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