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Efeito dos fungos Beauveria bassiana (Balsamo) e Metarhizium anisopliae Sorokin, 1883 na ecdise ninfal de Amblyomma cooperi (Nuttal; Warburton, 1908) (Acari: Ixodidae)



Efeito dos fungos Beauveria bassiana (Balsamo) e Metarhizium anisopliae Sorokin, 1883 na ecdise ninfal de Amblyomma cooperi (Nuttal; Warburton, 1908) (Acari: Ixodidae)



Revista Brasileira de Parasitologia VeterinariaAbril- ho; 12(2): 68-70



The in vitro effects of the fungus Beauveria bassiana isolate 986 (Bb986) and Metarhizium anisopliae isolate 959 (Ma959) in a conidia suspension form were evaluated over the Amblyomma cooperi nimphal ecdysis. The bioassays were proceeded in the Microbiological Control Artropods Laboratory in UFRRJ. Each bioassay was made in temperature and humidity controlled conditions (27[degree]C and > 80% RH), with four different treatments in the concentrations 105, 106 , 107 and 108 conidia/ml and a control group for each isolated. The biological parameters evaluated were pre-ecdysis and ecdysis periods, ecdysis and nimphal mortality percentages. Except the ecdyses period of the group treated with Ma959, all the other groups were affected by the fungus action. The most evident effect was observed in the nimphal mortality percentage, being 70% in the group treated with Ma959 in the concentration of 108 conidia/ml and 65% in the group treated with Bb986 in the concentration of 107 conidia/ml.

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