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首页> 外文学位 >Biology and control of Colletotrichum acutatum on strawberry.
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Biology and control of Colletotrichum acutatum on strawberry.

机译：草莓炭疽菌的生物学与防治。

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摘要

To better understand the disease cycle of Colletotrichum acutatum Simmonds on strawberry in California, common nursery cover crops including Austrian winter pea, bell bean, clover, hairy vetch, Merced rye, Sudan grass, triticale, and wheat were evaluated for their role in the epidemiology of strawberry anthracnose. Additional cover crops representing ten plant families were evaluated for their potential use in novel rotations at strawberry nurseries. Results of culture-based tissue assays indicated that C. acutatum asymptomatically colonized all plant species tested. Also, the pathogen remained viable in dry debris of the rotation crops for at least one month and sporulated upon exposure to free moisture. There were significant differences among plant species with regard to these parameters. C. acutatum was re-isolated from up to 70% of some crop tissues (e.g. mustard, red cowpea, and strawberry), but was recovered less frequently from Sudan grass (8.3%), millet (14.8%), and bell bean (24.3%). A sporulation assay indicated the fungus can produce up to 9x108 conidia/g debris (dry weight) on crops such as basil during one week at 100% RH. On other species, i.e. alfalfa, significantly less sporulation was detected. These differences suggest that production of C. acutatum inoculum can be reduced in rotation fields by selecting crops less amenable to exploitation by the pathogen.
机译：为了更好地了解加利福尼亚州草莓上的炭疽菌（Colletotrichum acutatum Simmonds）的病害周期，对常见的苗圃作物包括奥地利冬豌豆，甜菜豆，三叶草，多毛v子，默塞德黑麦，苏丹草，黑小麦和小麦在流行病学中的作用进行了评估。草莓炭疽病。评估了代表十个植物科的其他覆盖作物在草莓苗圃中新轮作的潜在用途。基于培养物的组织测定结果表明，无形假丝酵母无症状地定殖于所有测试的植物物种。而且，病原体在轮作的干燥残渣中仍能存活至少一个月，并在暴露于自由水分后散落。这些参数在植物种类之间存在显着差异。从最高至70％的某些农作物组织（例如芥菜，红cow豆和草莓）中重新分离出了盾形假丝酵母，但从苏丹草（8.3％），小米（14.8％）和柿子豆（ 24.3％）。孢子形成试验表明，在100％相对湿度下一周，真菌在罗勒等农作物上可产生高达9x108分生孢子/克碎片（干重）。在其他物种（即苜蓿）上，检测到的孢子形成明显减少。这些差异表明，通过选择不适合病原体利用的农作物，可以在轮作田中减少硬皮衣藻的接种量。

著录项

  • 作者

    Jertberg, Joseph Robert.;

  • 作者单位

    University of California, Davis.;

  • 授予单位 University of California, Davis.;
  • 学科 Agriculture Plant Pathology.
  • 学位 M.S.
  • 年度 2009
  • 页码 60 p.
  • 总页数 60
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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