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首页> 外文学位 >Intraspecies transmission and effects of an unidentified microsporidium on the convergent lady beetle, Hippodamia convergens Guerin-Meneville (Coleoptera: Coccinellidae), used for biological control.
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Intraspecies transmission and effects of an unidentified microsporidium on the convergent lady beetle, Hippodamia convergens Guerin-Meneville (Coleoptera: Coccinellidae), used for biological control.

机译：物种间的传播以及未识别的微孢子虫对会聚的瓢虫（Hippodamia convergens Guerin-Meneville）（鞘翅目：Coccinellidae）的生物学控制作用。

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摘要

Convergent lady beetles, Hippodamia convergens Guerin-Meneville, are often used for aphid control in agriculture and in home gardens. Beetles are collected from overwintering sites in California and are customarily released in large quantities. Although H. convergens are known to host the microsporidium Nosema hippodamiae , there are currently no screening procedures in place to ensure beetle health or quality. The purpose of this study was to examine the effects of an unidentified microsporidium found in commercially-available H. convergens on its life history characteristics and to examine vertical and intraspecies horizontal transmission routes. Microsporidia-infected H. convergens larvae took significantly longer to develop than did their uninfected cohorts. There was no significant difference in mean egg hatch and larval mortality. Cumulative mean egg production and mean adult survival for microsporidia-infected females was significantly lower than that of uninfected females. Vertical transmission was 100% efficient and horizontal transmission occurred through ingestion of spores. Microspondian spores in this study measured 3.6 x 2.4 mum, which is within the range reported for N. hippodamiae measure.
机译：会聚的瓢虫（Hippodamia convergens Guerin-Meneville）通常用于农业和家庭花园中的蚜虫防治。甲虫是从加利福尼亚的越冬地点采集的，通常会大量释放。尽管已知融合猪链球菌携带小孢子虫海马假单胞菌，但目前尚无筛查程序来确保甲虫的健康或质量。这项研究的目的是检查在商业上可获得的H. convergens中发现的未鉴定的微孢子虫对其生活史特征的影响，并研究垂直和种内水平传播途径。微孢子虫感染的H. convergens幼虫比未感染的同类花了更长的时间才能发育。平均卵孵化率和幼虫死亡率没有显着差异。微孢子虫感染女性的平均平均产卵量和平均成年存活率显着低于未感染女性。垂直传播是100％有效的，水平传播是通过摄入孢子发生的。在这项研究中，小海绵体孢子的大小为3.6 x 2.4毫米，处于报道的河马猪笼草测量范围内。

著录项

  • 作者

    Joudrey, Philip E.;

  • 作者单位

    Saint Mary's University (Canada).;

  • 授予单位 Saint Mary's University (Canada).;
  • 学科 Biology Entomology.
  • 学位 M.Sc.
  • 年度 2006
  • 页码 42 p.
  • 总页数 42
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 昆虫学;
  • 关键词

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