Significant mortality of eggs and young larvae of two pine processionary moth species due to the entomopathogenic fungus Metarhizium brunneum
Significant mortality of eggs and young larvae of two pine processionary moth species due to the entomopathogenic fungus Metarhizium brunneum
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昆虫病原真菌绿僵菌导致两种松树长蛾的卵和幼虫显着死亡
DOI：
10.1080/09583157.2018.1447084
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发表时间：
2018
影响因子：
1.4
通讯作者：
Aydin T
中科院分区：
文献类型：
--
作者：
Aydin T
采用生物测定法测定了松褐拟谷盗（Thaumetopoea pityocampa）和威氏拟谷盗（Thaumetopoea wilkinsoni）两种松毛虫对褐绿僵菌（Metarhizium brunneum）两个菌株（ARSEF 4556、V275）的敏感性。两种菌株处理的卵的死亡率范围为96%至99%，但并非所有这些都是由褐色分枝杆菌引起的，因为对照组也经历了由于腐殖真菌引起的卵死亡。尽管如此，在实验室中孵化的幼虫从鸡蛋与褐腐霉处理的这种真菌杀死所有，获得褐腐霉分生孢子，而幼虫死亡率为0%，在对照组。这两种松毛虫的幼虫对ARSEF 4556和V275也高度敏感，接种后8天，幼虫死亡率在94%至100%之间，绝大多数幼虫在前2-4天内死亡。幼虫死亡率呈剂量依赖性。结果表明，松毛虫对卵和幼虫的致病性在生物防治中具有广阔的应用前景。研究还表明，松毛虫卵的非靶标寄生蜂也对褐飞虱敏感。需要进一步的工作来了解和减少M. brunneume对非靶标昆虫的影响。
Bioassays were conducted to determine the susceptibility of egg masses and young larvae of two pine processionary moth species,Thaumetopoea pityocampaandThaumetopoea wilkinsoni, to two strains (ARSEF4556, V275) of the entomopathogenic fungusMetarhizium brunneum. Mortality of treated eggs by both strains ranged from 96% to 99% but not all of this was caused byM. brunneumsince control groups also experienced egg mortality due to saprophytic fungi. Still, larvae hatched in the laboratory from eggs treated withM. brunneumwere all killed by this fungus, acquiringM. brunneumconidia, whereas larval mortality was 0% in the control groups. Young larvae of both pine processionary moth species were also highly susceptible to ARSEF4556 and V275 with larval mortality ranging between 94% and 100%, 8 days post-inoculation, with the vast majority of larvae being killed within the first 2–4 days. Larval mortality was dose dependent. Results were consistent across the two pine processionary moth species, showing that the pathogenicity ofM. brunneumto both eggs and young larvae might be promising for biological control of these insect pests. The study also showed that non-target parasitoids of pine processionary moth eggs were also susceptible toM. brunneum. Further work is required to understand and reduce theM. brunneumeffect on non-target insects.
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