Abstract
The efficacy ofPaecilomyces fumosoroseus (Wize) Brown & Smith,P. farinosus (Holm ex S. F. Gray) Brown & Smith,Beauveria bassiana (Balsamo) Vuillemin,Metarhizium anisopliae (Metschnikoff) Sorokin and an entomoparasitic nematode,Steinernema feltiae (Filipjev), against larvae and pupae of the apple fruit mothArgyresthia conjugella (Zell.) (Lepidoptera: Yponomeutidae) was studied in field and laboratory experiments. All species of fungi and the nematode were highly pathogenic to larvae in Petri dishes. In soil, the pathogenicity ofB. bassiana andP. farinosus for larvae decreased. Pupae inside cocoons were highly susceptible toP. fumosoroseus, but not toP. farinosus orB. bassiana. In the field experiment, treatment of soil with conidia ofP. fumosoroseus at a rate of 1×107 conidia per cm2 reduced the emergence of overwinteredA. conjugella adults by 70.1% compared to untreated control soil.
Résumé
L’efficacité dePaecilomyces fumosoroseus (Wize) Brown,P. farinosus (Brown & Smith),Beauveria bassiana (Balsamo) Vuillemin,Metarhizium anisopliae (Metschnikoff) Sorokin et du nématode entomopathogène,Steinernema feltiae (Filipjev), contre les larves et les nymphes deArgyresthia conjugella (Zell.) (Lepidoptera : Yponomeutidae) a été étudiée expérimentalement au champ et au laboratoire. Toutes les espèces de champignons ainsi que le nématode se sont révélés hautement pathogènes pour les larves placées dans des boîtes de Petri. Dans le sol, la pathogénicité deB. bassiana etP. farinosus à l’égard des larves était plus faible. Les nymphes à l’intérieur des cocons étaient très sensibles àP. fumosoroseus mais pas àP. farinosus ouB. bassiana. Dans les expériences au champ, le traitement du sol avec les conidies deP. fumosoroseus à raison de 1 × 107 conidies par cm2 réduisait l’émergence des adultes deA. conjugella après hivernation de 70,1 % par rapport au sol témoin non traité.
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Vänninen, I., Hokkanen, H. Efficacy of entomopathogenic fungi and nematodes againstArgyresthia conjugella (Lep.: Yponomeutidae). BioControl 42, 377–385 (1997). https://doi.org/10.1007/BF02769831
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DOI: https://doi.org/10.1007/BF02769831