...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Insects >Virulence of Two Entomophthoralean Fungi, Pandora neoaphidis and Entomophthora planchoniana , to Their Conspecific ( Sitobion avenae ) and Heterospecific ( Rhopalosiphum padi ) Aphid Hosts
【24h】

Virulence of Two Entomophthoralean Fungi, Pandora neoaphidis and Entomophthora planchoniana , to Their Conspecific ( Sitobion avenae ) and Heterospecific ( Rhopalosiphum padi ) Aphid Hosts

机译：两种食虫真菌Pandora neoaphidis和Planchoniana对其具特异性的（Stobion avenae）和异特异性的（Rhopalosiphum padi）蚜虫的毒力。

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Pandora neoaphidis and Entomophthora planchoniana (phylum Entomophthoromycota) are important fungal pathogens on cereal aphids, Sitobion avenae and Rhopalosiphum padi . Here, we evaluated and compared for the first time the virulence of these two fungi, both produced in S. avenae cadavers, against the two aphid species subjected to the same exposure. Two laboratory bioassays were carried out using a method imitating entomophthoralean transmission in the field. Healthy colonies of the two aphid species were exposed to the same conidial shower of P. neoaphidis or E. planchoniana , in both cases from a cadaver of S. avenae . The experiments were performed under LD 18:6 h at 21 °C and a successful transmission was monitored for a period of nine days after initial exposure. Susceptibility of both S. avenae and R. padi to fungal infection showed a sigmoid trend. The fitted nonlinear model showed that the conspecific host, S. avenae , was more susceptible to E. planchoniana infection than the heterospecific host R. padi , was. In the case of P. neoaphidis , LT 50 for S. avenae was 5.0 days compared to 5.9 days for R. padi . For E. planchoniana , the LT 50 for S. avenae was 4.9 days, while the measured infection level in R. padi was always below 50 percent. Our results suggest that transmission from conspecific aphid host to heterospecific aphid host can occur in the field, but with expected highest transmission success to the conspecific host.
机译：潘多拉新蚜虫和浮游昆虫标本（Entomophthora planchoniana）是谷物蚜虫，麦冬（Sitobion avenae）和红景天（Rhodolosiphum padi）上重要的真菌病原体。在这里，我们首次评估和比较了这两种真菌的毒性，这两种真菌都是在S. avenae尸体中产生的，对两种受到相同暴露的蚜虫物种的毒性。两种实验室生物测定法是使用一种在现场模拟食虫性乙草胺传播的方法进行的。两个蚜虫物种的健康菌落都暴露在同一孢子囊的新蚜虫或大肠杆菌中，这两种情况均来自燕麦的尸体。实验在21°C的LD 18：6 h下进行，在初次暴露后的9天内监测了成功的传播。燕麦葡萄球菌和帕迪酵母对真菌感染的易感性呈乙状趋势。拟合的非线性模型表明，与异种宿主R. padi相比，同种宿主S. avenae更易感染车床链球菌。在P. neoaphidis的情况下，S. avenae的LT 50为5.0天，R. padi的为5.9天。对于E.planchoniana，A。avenae的LT 50为4.9天，而实测的R. padi感染水平始终低于50％。我们的结果表明，从同种蚜虫宿主到异种蚜虫宿主的传播可以在野外发生，但是对同种宿主的传播成功最高。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号