Effects of CO<sub>2 </sub>enrichment on the biological characteristics of the red morph of the pea aphid, <em>Acyrthosiphon pisum</em> (Hemiptera: Aphididae)
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ACTA ENTOMOLOGICA SINICA  2018, Vol. 61 Issue (8): 968-975    DOI: 10.16380/j.kcxb.2018.08.010
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Effects of CO2 enrichment on the biological characteristics of the red morph of the pea aphid, Acyrthosiphon pisum (Hemiptera: Aphididae)
SUN Qian, ZHANG Ting-Wei, LÜ-Yu-Qing, WEI Jun-Yu, LI Jing-Jing, LIU Chang-Zhong*
 (Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou 730070, China)
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Abstract 【Aim】 To reveal the biological characteristics of the red morph of the pea aphid, Acyrthosiphon pisum after feeding on Medicago staiva seedlings cultivated under different CO2 concentrations, and to verify the population succession of this insect under elevated CO2 concentration. 【Methods】 Red pea aphids were reared on M. staiva seedlings under three CO2 concentrations [380 (CK), 550 and 750 μL/L] in CO2 gradient chamber for six consecutive generations, and the growth parameters, reproductive parameters and population life parameters for each generation were observed and analyzed. 【Results】 The elevated CO2 concentrations presented significant effects on the biological parameters of red pea aphids (P<0.05). With the increase of CO2 concentration and the number of generations of the pea aphid, the developmental duration of red pea aphids was significantly prolonged, whereas the adult longevity was significantly shortened and the mean fecundity significantly decreased (P<0.05). Moreover, with the increase of CO2 concentration, the net reproductive rate (R0), intrinsic increase rate (rm) and finite increase rate (λ)  of the same generation were all decreased, while the generation time (T) was shortened and then extended. The maximum net reproductive rate, intrinsic increase rate and finite increase rate in the pea aphid reared on M. staiva seedlings under 750 μL/L CO2 concentration were decreased by 7.71%, 34.57% and 84.39% respectively, as compared with the control. 【Conclusion】 The elevated atmospheric CO2 concentration presents negative effects on the population of the red morph of the pea aphid, which are more significant with the increase of generations.
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SUN Qian
ZHANG Ting-Wei
吕Yu-Qing
Wei-Jun-Yu
Li-Jing-Jing
LIU Chang-Zhong
Key wordsAcyrthosiphon pisum   CO2 concentration   alfalfa   life table   reproductive rate   population parameters     
Cite this article:   
SUN Qian,ZHANG Ting-Wei,吕Yu-Qing et al. Effects of CO2 enrichment on the biological characteristics of the red morph of the pea aphid, Acyrthosiphon pisum (Hemiptera: Aphididae)[J]. ACTA ENTOMOLOGICA SINICA, 2018, 61(8): 968-975.
URL:  
http://www.insect.org.cn/EN/10.16380/j.kcxb.2018.08.010      or     http://www.insect.org.cn/EN/Y2018/V61/I8/968
 
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