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Larvae in your ears: Does western bean cutworm larval feeding damage encourage Gibberella ear rot development?

机译：幼虫在您的耳朵中：西豆角虫幼虫的进食损害会促进赤霉素的耳腐吗？

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摘要

Western bean cutworm (Striacosta albicosta (Smith)) is a relatively new pest in Indiana, being trapped in the state since 2006. In 2009, larval feeding damage in corn reached economically damaging levels in some fields. During this year there was also an outbreak of Gibberella ear rot (Gibberella zeae); corn containing the mycotoxin, deoxynivalenol, produced by this pathogen in concentrations exceeding advised FDA limits caused the grain to be rejected. A three year study was conducted to evaluate the possible affect that western bean cutworm larval feeding damage or presence had on development of Gibberella ear rot in field corn and the role of a pyraclostrobin fungicide (Headline®) on managing the disease. Caterpillar feeding damage and presence encouraged fungal mycelial growth on field corn ears. An application of the fungicide Headline® did not reduce nor increase disease symptoms within fields. A management plan that targets the insect pest through appropriately timed insecticide applications also reduces the likelihood of ear rot development within field corn in Indiana.
机译：西部豆角虫（Striacosta albicosta（Smith））在印第安纳州是一种相对较新的害虫，自2006年以来一直被困在该州。2009年，玉米的幼虫饲喂损害在某些领域达到了经济破坏水平。在这一年中，还爆发了赤霉素耳腐病（Gibberella zeae）。这种病原体产生的含有真菌毒素，脱氧雪腐烯酚的玉米的浓度超过了FDA的建议限值，导致谷物被拒收。进行了为期三年的研究，以评估西葫芦幼虫进食的损害或存在对田间玉米中赤霉素耳腐的发展以及吡咯菌酯杀真菌剂（Headline®）在控制该疾病中的作用。毛虫的进食损伤和存在促进了玉米穗上真菌菌丝的生长。杀真菌剂Headline®的施用不会减少或增加田间的疾病症状。通过适当定时施用杀虫剂来针对害虫的管理计划还降低了印第安纳州田间玉米内发生耳腐的可能性。

著录项

  • 作者

    Parker, Nicole S.;

  • 作者单位

    Purdue University.;

  • 授予单位 Purdue University.;
  • 学科 Biology Entomology.;Agriculture Plant Pathology.;Agriculture General.
  • 学位 M.S.
  • 年度 2012
  • 页码 72 p.
  • 总页数 72
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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