草地学报

›› 2009, Vol. 17 ›› Issue (4): 505-509.DOI: 10.11733/j.issn.1007-0435.2009.04.018

• 研究论文 • 上一篇    下一篇

不同苜蓿品种对牛角花齿蓟马的耐害性研究

胡桂馨, 师尚礼, 王森山, 魏列新, 宋丽雯   

  1. 甘肃农业大学草业学院, 草业生态系统教育部重点实验室, 中美草业中心, 甘肃, 兰州, 730070
  • 收稿日期:2008-10-13 修回日期:2009-05-11 出版日期:2009-08-15 发布日期:2009-08-15
  • 作者简介:胡桂馨(1968- ),女,甘肃景泰人,博士,研究方向为草地昆虫及害虫防治,E-mail:huguixin@gsau.edu.cn
  • 基金资助:
    “十一五”国家科技支撑计划子课题(2006BAD01A19-6-2)

Tolerance of Alfalfa Varieties to Odontothrips loti Haliday

HU Gui-xin, SHI Shang-li, WANG Sen-shan, WEI Lie-xin, SONG Li-wen   

  1. Pratacultural College, Gansu Agricultural University;Key Laboratory of Grassland Ecosystem, Ministry of Education; Sino-U.S.Center for Grassland Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China
  • Received:2008-10-13 Revised:2009-05-11 Online:2009-08-15 Published:2009-08-15

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摘要： 评价8个苜蓿品种在牛角花齿蓟马(Odontothrips loti Haliday)不同密度成虫为害后的抗性表现,并从株高、分枝数及产量损失率3个方面测定,以揭示各品种对蓟马的耐害性以及苜蓿抗蓟马研究的最适接虫量.结果表明:随着虫口密度的增大,各苜蓿品种植株的为害指数明显上升,M8和HA-3苜蓿均表现为抗牛角花齿蓟马,Ja苜蓿表现为高感蓟马,其他苜蓿品种处于中等水平;产量损失率M8、HA-3最低,Ja最高,在株高和分枝方面呈现相同规律;研究表明M8、HA-3苜蓿对牛角花齿蓟马的耐害性最高,Ja苜蓿的耐害性最差.

关键词: 苜蓿品种, 牛角花齿蓟马, 产量损失率, 株高, 分枝

Abstract: Odontothrips loti Haliday is one of the most important pests which affect hay yield and quality of alfalfa seriously in north China.At present,controlling methods on this pest is pesticide spraying.However,it has hardly any ideal effect using single controlling method because of the short growth period,miniature body,easy enshrouded,and anti-pesticide of the thrips.Using varieties resistant to insect is one of the most effective approaches to solve thrips damage on alfalfa ultimately.In this study,the tolerances of 8 alfalfa varieties to O.loti were evaluated at alfalfa 6-leaf-stage by infecting 3,5 and 10 adult thrips per plant,respectively.The results indicate,after 5 day feeding by thrips,the damage indices of all alfalfa varieties were increased significantly and the plants from some varieties were dead along with the increased thrips density.M8 and HA-3 alfalfa were the resistant varieties to O.loti in this study,Ja alfalfa was susceptible,and other varieties were medium.Accordingly,the yield loss ratios of HA-3 and M8 were the lowest, Ja alfalfa the highest,and other varieties medium;same situations as the plant height and branching.In summary,the tolerance of Ja alfalfa to O.loti was the poorest,while HA-3 and M8 were the best.

Key words: Alfalfa variety, Odontothrips loti Haliday, Yield loss ratio, Height, Branch

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