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ARS Home » Southeast Area » Tifton, Georgia » Crop Genetics and Breeding Research » Research » Publications at this Location » Publication #309046
Title: Changes in life history parameters of corn leaf aphid, Rhopalosiphum maidus (Homoptera: Aphididae), under four different elevated temperature and CO2 combinations

Author
item XIE, HAICUI - Chinese Academy Of Agricultural Sciences
item ZHAO, LEI - Chinese Academy Of Agricultural Sciences
item WANG, WENQIANG - Chinese Academy Of Agricultural Sciences
item WANG, ZHENYING - Chinese Academy Of Agricultural Sciences
item Ni, Xinzhi
item CAI, WANZHI - China Agricultural University
item HE, KANGLAI - Chinese Academy Of Agricultural Sciences

Submitted to: Journal of Economic Entomology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/8/2014
Publication Date: 8/1/2014
Citation: Xie, H., Zhao, L., Wang, W., Wang, Z., Ni, X., Cai, W., He, K. 2014. Changes in life history parameters of corn leaf aphid, Rhopalosiphum maidus (Homoptera: Aphididae), under four different elevated temperature and CO2 combinations. Journal of Economic Entomology. 107:1411-1418.

Interpretive Summary: To assess the effect of climate change on insect development, biological characteristics of corn leaf aphid on barley were examined for two generations under four different elevated temperature and CO2 combination regimes. The developmental duration for each life stage was significantly reduced under the elevated temperature of 4°C. The elevated CO2 (700-750 ppm) reduced only the development time of late instar nymphs. The overall duration of nymphal stage was reduced in the second generation. Thus, the temperature was the dominant factor to development duration of the corn leaf aphid. The reproduction of corn leaf aphid was significantly increased under the elevated temperature and CO2. Elevated temperature and CO2 increased the number of winged-aphid production, which may enhance the aphid migration/dispersal and the spread of plant viruses. Corn leaf aphid population had the highest rate of increase under the elevated temperature and CO2 combination in the second generation. These results indicate that, under the climate change, the combined effects of both elevated temperature and CO2 on aphid biology may exacerbate aphid damage on barley.

Technical 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/l) reduced only the development time of 4th 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/dispersal and the spread of plant viruses. Corn leaf aphid had the highest intrinsic rate of increase (rm) 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.