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Acta Prataculturae Sinica ›› 2020, Vol. 29 ›› Issue (3): 96-102.DOI: 10.11686/cyxb2019281

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Response of biological characteristics of two color morphs of pea aphid (Acyrthosiphon pisum) to different soybean varieties

MA Ya-ling1, LIU Hui2, LIU Yang2, LI Chun-jie1,*   

  1. 1.State Key Laboratory of Grassland Agro-Ecosystems, Engineering Research Center of Grassland Industry, Ministry of Education, Gansu Technology Innovation Center of Western China Grassland Industry, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China;
    2.Linxia Academy of Agricultural Sciences, Linxia 731100, China
  • Received:2019-06-10 Online:2020-03-20 Published:2020-03-20

Abstract: The effect of four soybean varieties (‘Fendoumulü2’, ‘Nanxiadou25’, ‘Nanheidou20’ and ‘Nandou5’) on the biological characteristics of two color morphs of pea aphid (Acyrthosiphon pisum) were studied in order to provide a theoretical basis for evaluating resistance of soybean varieties and formulation of strategies for comprehensive control of pea aphid damage. The experiment was conducted in an artificial climate chamber with photoperiod 10 h light and 14 h dark, temperature (23±1) ℃, humidity of 60%±10% and light intensity of 212 μmol photons·m-2·s-1. Two color morphs of pea aphid (red and green) were established to feed on the different soybean varieties. Biological parameters of the pea aphids such as instars, developmental duration, weight difference, and mean relative growth rate (MRGR) were measured. It was found that: 1) There were significant differences in the development duration and MRGR of red pea aphid among different soybean varieties. The developmental duration of red pea aphid was longest (8.30 d) in ‘Nanxiadou25’ and shortest (7.29 d) in ‘Nanheidou20’. Compared with ‘Nanxiadou25’, the MRGR of aphids feeding on ‘Fendoumulü2’, ‘Nanheidou20’ and ‘Nandou5’ was MRGR decreased by 31.25%, 25.00% and 12.50%, respectively. The nymph survival rate was the highest on ‘Nanheidou20’; The red aphid feeding preference for the soybean varieties was ‘Nanheidou20’>‘Fendoumulü2’>‘Nandou5’>‘Nanxiadou25’. 2) The average growth rate, development duration and MRGR of green pea aphid differed significantly in different instars between soybean varieties, with the longest development duration (8.84 d) occurring in ‘Nandou5’ and the shortest development duration (7.81 d) in ‘Nanxiadou25’. Compared with ‘Nanxiadou25’ the MRGR of ‘Fendoumulü2’, ‘Nanheidou20’ and ‘Nandou5’ decreased by 6.25%, 25.00% and 12.50%, respectively. The highest nymph survival rate was for ‘Nanheidou20’. The green aphid feeding preference for the soybean varieties was ‘Nanxiadou25’>‘Nanheidou20’>‘Fendoumulü2’>‘Nandou5’. Therefore, the growth and development of red and green pea aphids was affected differently by different soybean varieties.

Key words: Acyrthosiphon pisum, soybean variety, development duration, mean relative growth rate, survival rate