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- W2615165712 abstract "The virulence of 22 indigenous isolates of entomopathogenic hyphomycetes consisting of nine Beauveria bussiana (Bals.) Vuil1., one B. brongniarlii (Petch.) Sacc., five Melarhizium aniropliae (Metsch.) Sorokin, two M. flavoviride Gams and Rozsypal and five Nomuraea rileyi (Farlow) Samson originating from a wide range of insect spccies was investigated in laboratory bioassays on larvae of cashew tree borer, Plocaederus ferrugineus L. (Cerambycidae : Coleoptera). All the isolates tested were pathogenic to the pest, but to varying degrees. In single-dose (1 x 107 conidia ml) screening assays, only three isolates: one B. barsiana BbPf VRI 1198 and two M. anisopliae MaPf VRI 0198 and MaPf NRCC 98 were superior to all other isolates in terms of mortality induced on the tree borer larvae. All the three fungal strains were isolated originally from R ferrugineus grubs. Detailed studies were made on the three effective isolates to determine their virulency at multiple-dose series ranging from 1 x 10 to 1 x 109 conidia ml. Of them, M. anisopliae MaPfVRI 0198 was most effective in killing Rferrugineus larvae at concentration lower than lO7t:onidia ml. The median lethal concentration estimated at 18 days post-inoculation from three independent bioassay for this isolate was 1.50 x 10‘ conidia ml. This was closely followed by B. bassiana BbPf VRI 1198 with a LC50 of 1.25 X 105 conidia ml. The M. anisopliae MaPf NRCC 98 did not achieve 50 per cent mortality within the test pcriod at concentration lower than 107 conidia ml. This study proved that mortality was concentration related. and mycoses occurred at 107 conidia ml. Based on the titne-dose mortality factor, the M. anisopliae isolate MaPf VRI 0198 has been selected for further investigations on mass production, formulation and field use." @default.
- W2615165712 created "2017-05-26" @default.
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- W2615165712 date "2003-01-01" @default.
- W2615165712 modified "2023-09-24" @default.
- W2615165712 title "SCREENING AND SELECTION OF ENTOMOPATHOGENIC FUNGI FOR MANAGEMENT OF CASHEW TREE BORER, Plocaederus ferrugineus L. (CERAMBYCIDAE : COLEOPTERA)" @default.
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