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1 August 2007 Influence of Constant Temperatures on Life History Parameters of the Cotton Aphid, Aphis gossypii, Infesting Cotton
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Abstract

Laboratory clip-cage studies were conducted to quantify the temperature-dependent development, survivorship, and reproduction and to generate life history characteristics and population growth parameters of the cotton aphid, Aphis gossypii Glover, on phenologically standardized greenhouse-grown cottons at 10, 15, 20, 25, 30, and 35°C. The developmental thresholds were estimated to be 6.3, 6.7, 5.9, 5.9, and 6.3°C for first to fourth instars and for total nymphal development, respectively. The maximum rate of development were estimated to occur at 32.2, 30.8, 30.4, 30.0, and 30.2°C for first to fourth instars and for total nymphal development, respectively. Increased temperature resulted in more rapid decline in survivorship, which was particularly sharp at 35°C, dropping from 94 to 17% in 5 d. Number of days elapsed until first deposition of progeny increased progressively and sharply at temperatures 10 (26 d) to 15 (15 d) to 20°C (8 d) and stabilized at 5 d for 25, 30, and 35°C. Average lifetime fecundity of females rose from a low of 9.76 progeny at 10°C to a peak of 58.9 progeny at 30°C and declined sharply to 17.3 at 35°C. Finite rate of population growth was highest at 25°C and lowest at 10°C. Although stage-specific developmental maxima occurred between 30 and 32°C, a nonlinear regression model estimated 28.6°C to be the optimum temperature for overall cotton aphid development, reproduction, and population increase.

Megha N. Parajulee "Influence of Constant Temperatures on Life History Parameters of the Cotton Aphid, Aphis gossypii, Infesting Cotton," Environmental Entomology 36(4), 666-672, (1 August 2007). https://doi.org/10.1603/0046-225X(2007)36[666:IOCTOL]2.0.CO;2
Received: 11 July 2006; Accepted: 27 March 2007; Published: 1 August 2007
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