Susceptibility of Chilo partellus Swinhoe (Lep., Pyralidae) eggs to entomopathogenic Hyphomycetes
Susceptibility of Chilo partellus Swinhoe (Lep., Pyralidae) eggs to entomopathogenic Hyphomycetes
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Chilo partellus Swinhoe (Lep., Pyralidae) 卵对昆虫病原丝菌的敏感性
DOI：
10.1111/j.1439-0418.1991.tb01028.x
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发表时间：
1991
影响因子：
1.9
通讯作者：
N. K. Maniania
中科院分区：
文献类型：
--
作者：
N. K. Maniania
在实验室中，用四种球孢白僵菌（Balsamo）Vuillemin（ICIPE 1、2、4、12）、一种绿僵菌金龟子变种（Metarhizium anisopliae var.绿僵菌（Metschnikoff）Sorokin（ICIPE 18）和玫烟色拟青霉（Wize）Brown和Smith的两个分离物（ICIPE 10，11）。在浓度为108 ml-1时，除ICIPE 1外，所有测试的真菌均导致超过82%的死亡率。C.从处理过的卵块中孵化出的partellus幼虫也对除ICIPE 10外的所有真菌菌株敏感。证明了最具活性分离株的剂量-死亡率关系。然而，所有剂量的ICIPE 4处理卵的延迟幼虫死亡率均为100%。测定了12、24、48、72、96和120 h龄卵对ICIPE 4和ICIPE 18的敏感性。病原体的感染能力随卵龄的增加而降低，但延迟幼虫死亡率不受卵龄的影响。结果表明，卵是该菌侵染的最佳时期。在供试的真菌中，分离物B. bassiana ICIPE 4和M. Anisopliae ICIPE 18对C. partellus。
Egg masses of the stem‐borer, Chilo partellus Swinhoe, were infected in the laboratory with conidial suspensions of four isolates of Beauveria bassiana (Balsamo) Vuillemin (ICIPE 1, 2, 4, 12), one isolate of Metarhizium anisopliae var. anisopliae (Metschnikoff) Sorokin (ICIPE 18) and two isolates of Paecilomyces fumosoroseus (Wize) Brown and Smith (ICIPE 10, 11). At a concentration of 108 condidia ml‐1, all fungi tested, except ICIPE 1, caused more than 82 % mortality. C. partellus larvae hatching from treated egg masses were also susceptible to all fungal strains, except ICIPE 10. Dose‐mortality relationships were demonstrated for the most active isolates. However, deferred larval mortality from eggs treated with ICIPE 4 was 100 % for all doses. The susceptibility of 12, 24, 48, 72, 96, and 120 h‐old eggs to ICIPE 4 and ICIPE 18 was determined. The ability of the pathogen to infect decreased with the age of eggs; however, deferred larval mortality was not affected by the age of eggs. Results indicate that eggs could be the optimal stage for infection by the fungus. Among the fungi tested, isolates B. bassiana ICIPE 4 and M. anisopliae ICIPE 18 appeared promising for control of the early stages of C. partellus.