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Acta Prataculturae Sinica ›› 2016, Vol. 25 ›› Issue (6): 190-197.DOI: 10.11686/cyxb2015300

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An evaluation of the main cultivated Medicago sativa cultivars (strains) for Acyrthosiphon pisum resistance in Ningxia

MA Jian-Hua1, WEI Shu-Hua1, ZHANG Hong-Ying2, ZHANG Rong1, *, LI Ke-Chang3, LUO Xiao-Ling3, ZHANG Yu3   

  1. 1.Institute of Plant Protection, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;
    2.Agriculture College, Ningxia University, Yinchuan 750001, China;
    3.Grassland Workstation of Ningxia, Yinchuan 750002, China
  • Received:2015-06-10 Revised:2015-12-28 Online:2016-06-20 Published:2016-06-20

Abstract: An evaluation of the 12 main Medicago sativa cultivars (strains) for aphid resistance was carried out using aphid ration and fuzzy recognition methods in field and indoor conditions in Ningxia. The aphid population in the field was complex, consisting mainly of Acyrthosiphon pisum (over 80% of the total aphid population). Field and indoor analysis showed that Surprising, WL343HQ and Derby were high susceptible strains, with aphid rations above 1.25 and significantly higher than the other cultivars. Platon, Zhongmu No.3 and Gannong No.4 were susceptible varieties, with aphid rations between 0.76 and 1.25. Pioneer was a middle resistant variety, with an aphid ration of 0.51. Santory, Crown, Queen, SR4030 and MF4020 were resistant varieties, with aphid rations between 0.26 and 0.50. Based on this study, a standard damage index of aphids to Medicago, and aphid ration and fuzzy recognition methods, are recommended for evaluating aphid resistance in field and indoor situations.