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首页> 外文学位 >Oriental fruit moth phenology in North Carolina apples and ecdysone agonist activity on oriental fruit moth and codling moth.
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Oriental fruit moth phenology in North Carolina apples and ecdysone agonist activity on oriental fruit moth and codling moth.

机译：北卡罗莱纳州苹果的东方果蛾物候和蜕皮激素对东方果蛾和and蛾的激动活性。

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摘要

Oriental fruit moth, Grapholita molesta (Busck) and codling moth, Cydia pomonella (L.), are internal fruit pests of apple. Codling moth is recognized as a pest of apple, but until the last several years, oriental fruit moth was considered primarily a pest of peaches. Elimination or reduction of organophosphate insecticides and their replacement with reduced-risk insecticides has created the need to evaluate the activity and efficacy of these newly introduced insecticides. The purpose of this research was to evaluate the activity of the ecdysone agonists tebufenozide and methoxyfenozide for codling moth and oriental fiuit moth and to develop management strategies for early season control of the two pests. Methoxyfenozide had greater activity than tebufenozide on codling moth and oriental fruit moth eggs and was active for at least 28 d. Residue breakdown of the two ecdysone agonists was similar, with 60 and 80% decline at 14 and 28 d after application, respectively. Effects of sublethal exposure to methoxyfenozide on the population dynamics of oriental fiuit moth was studied in single tree cages and laboratory studies. Population differences were observed between treated and untreated field cages, but could not be directly attributed to sublethal effects of methoxyfenozide; no sublethal effects were observed in laboratory studies. The phenology of oriental fruit moth was studied using egg sampling and pheromone traps to increase the knowledge of the pest in apple. Oriental fruit moth eggs were found on cluster leaves early and on fruit late in the season, predominantly on the top leaf surface and calyx end of the fruit. A degree-day model for oriental fruit moth oviposition was developed and the start of second-generation oviposition was predicted to occur at 507 DD (7.2 C base temp) after peak trap catch. Spray timing of methoxyfenozide was varied for control of codling moth and oriental fruit moth; two applications applied at 21-d spray intervals provided high levels of control for both pests.
机译：东方果蛾Grapholita molesta（Busck）和苹果mo蛾Cydia pomonella（L.）是苹果的内部害虫。 d蛾被认为是苹果的害虫，但是直到最近几年，东方果蛾被认为主要是桃子的害虫。消除或减少有机磷酸盐杀虫剂以及用降低风险的杀虫剂替代已经产生了评估这些新引入的杀虫剂的活性和功效的需求。这项研究的目的是评估蜕皮激素激动剂tebufenozide和methoxyfenozide对苹果d蛾和东方fi蛾的活性，并制定用于早期控制这两种害虫的管理策略。甲氧芬尼特在co蛾和东方果蛾卵上的活性比替布非尼特大，并且活性至少28 d。两种蜕皮激素激动剂的残留分解相似，施用后14和28 d分别下降60％和80％。在单个树笼中和实验室研究中研究了亚致死性暴露于甲氧基苯甲酰胺对东方on蛾种群动态的影响。在处理过的和未处理过的野外网箱之间观察到种群差异，但不能直接归因于甲氧芬诺的亚致死作用。在实验室研究中未观察到亚致死作用。利用鸡蛋采样和信息素诱捕器研究了东方果蛾的物候，以增加对苹果害虫的了解。在该季节的簇叶早期和果实后期发现了东方果蛾卵，主要在果实的顶叶表面和花萼末端。建立了东方水果蛾产卵的度日模型，并预测第二代产卵开始于捕集阱后的507 DD（基准温度7.2 C）发生。改变甲氧基苯乙脲的喷洒时间，以控制oz蛾和东方果蛾。以21天的喷雾间隔进行的两次施用为两种害虫提供了高水平的控制。

著录项

  • 作者

    Borchert, Daniel Michael.;

  • 作者单位

    North Carolina State University.;

  • 授予单位 North Carolina State University.;
  • 学科 Biology Entomology.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 105 p.
  • 总页数 105
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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