昆虫病原糸状菌Beauveria bassianaによるコナガの微生物的防除 : I.室内における病原性の検討と野外防除試験

概要

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The pathogenicities of five isolates of Beauveria bassiana to Plutella xylostella were investigated. Treatment of 4th-instar larvae with each isolate resulted in 0%-100% mortalities at 5 days after inoculation. Detailed studies were made on the most virulent isolate, MG-Bb-1,obtained from P.xylostella, to determine its efficacy at different developmental stages of P.xylostella, doses, and humidities. MG-Bb-1 had high pathogenicity to lervae of all instars, but little pathogenicity to eggs, and almost no pathogenicity to pupae. Humidity influenced the virulence to 4th-instar larvae ; MG-Bb-1 caused mortality of over 80% at 76% RH or higher levels, but only 30% mortality at 52% RH. A conidial suspension (10^7/ml) of MG-Bb-1 was sprayed on a cabbage field to control P.xylostella. A single application controlled P.xylostella as well as Flufenoxuron.
日本応用動物昆虫学会の論文
1998-05-25