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1 August 2014 Changes in Life History Parameters of Rhopalosiphum maidis (Homoptera: Aphididae) under Four Different Elevated Temperature and CO2 Combinations
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Abstract

Biological characteristics of corn leaf aphid, Rhopalosiphum maidis (Fitch), on barley, Hordeum vulgare L., were examined for two generations under four different elevated temperature and CO2 combinations. The developmental duration for each life stage was significantly reduced under the elevated temperature ( 4°C). The elevated CO2 (700–750 µl/liter) reduced only the development time of fourth-instar nymph. The overall duration of nymphal stage was reduced in the second generation. Thus, the temperature was the dominant factor to development duration of corn leaf aphid. The fecundity of corn leaf aphid was significantly increased under the elevated temperature and CO2, as well as in the later generation. Elevated temperature and CO2 increased the number of alate production, which may enhance the aphid migration or dispersal and the spread of plant viruses. Corn leaf aphid had the highest intrinsic rate of increase under the elevated temperature and CO2 combination in the second generation. These results indicate that the combined effects of both elevated temperature and CO2 on aphid biology may exacerbate aphid damage on barley under the climate change in accompany with elevated temperature and CO2 level.

© 2014 Entomological Society of America
Haicui Xie, Lei Zhao, Wenqiang Wang, Zhenying Wang, Xinzhi Ni, Wanzhi Cai, and Kanglai He "Changes in Life History Parameters of Rhopalosiphum maidis (Homoptera: Aphididae) under Four Different Elevated Temperature and CO2 Combinations," Journal of Economic Entomology 107(4), 1411-1418, (1 August 2014). https://doi.org/10.1603/EC13302
Received: 30 June 2013; Accepted: 1 May 2014; Published: 1 August 2014
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