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Natural infection ofTetranychus evansi [Acarina: Tetranychidae] by aTriplosporium sp [Zygomycetes: Entomophthorales] in northeastern Brazil

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Abstract

Infections ofTetranychus evansi Baker & Pritchard byTriplosporium sp. were observed on tomatoes from April through June of 1979 in Petrolina (Pernambuco), Brazil. Apparently, the pathogenic effect of the fungus together with the direct effect of the rain are important factors in reducing mite populations. The morphological characteristics of this species are described and compared with those of other mite-infectingTriplosporium spp. The taxonomic status of this fungus on the specific and generic levels is discussed.

Résumé

Dans les conditions de Petrolina (Pernambouc), Brésil, on a observé sur des plants de tomate, chezTetranychus evansi Baker & Pritchard un taux élevé d'infection causée par unTriplosporium sp. Ces observations correspondent à la période Avril–Juin 1979. Elles permettent de conclure que selon toute vraisemblance, l'action pathogène du champignon et l'effet direct de la pluie jouent un rôle important dans la diminution des populations d'acariens. Les caractères morphologiques de cette espèce sont décrits et comparés avec ceux des autres espèces deTriplosporium qui affectent les acariens. La position spécifique et générique de ce champignon est discutée.

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Authors and Affiliations

  1. Insect Pathology Research Unit, USDA-SEA-AR, Boyce Thompson Institute, 14853, Ithaca, New York, USA

    R. A. Humber

  2. CPATSA/EMBRAPA, 56.300, Petrolina, PE, Brazil

    G. J. Moraes & J. M. dos Santos

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  1. R. A. Humber
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  2. G. J. Moraes
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  3. J. M. dos Santos
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Humber, R.A., Moraes, G.J. & dos Santos, J.M. Natural infection ofTetranychus evansi [Acarina: Tetranychidae] by aTriplosporium sp [Zygomycetes: Entomophthorales] in northeastern Brazil. Entomophaga 26, 421–425 (1981). https://doi.org/10.1007/BF02374716

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