Susceptibility of Zaprionus indianus (diptera: drosophilidae) to the entomopathogenic fungus Beauveria bassiana / Suscetibilidade de Zaprionus indianus (diptera:drosophilidae) ao fungo entomopatogÃnico Beauveria bassiana

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Zaprionus indianus is known as âfig flyâ. It comes disseminating in whole Brazil, due to the environmental favorable conditions. It was introduced recently and there isnât measured efficient for its control. A viable alternative could be used is the entomopathogenic fungi, like Beauveria bassiana. The present study was developed in laboratory conditions to evaluate the susceptibility of Z. indianus to B. bassiana. The larvae were submerged and the adults were pulverized by different fungic concentration (104 to 108 conidia/mL) and stored in container containing specific medium in order to analyze the biological parameters. The pre-pupal period was not altered in comparacion with the control group; the pupal stage was increased in three days. The percentage of emergence in the control group was 97.33 %, while in the higher concentration (108) it was 10.60 and 13.33 % for B. bassiana URM2916 and B. bassiana URM3447, respectively. In the adultâs bioassay it was observed death from the second day after inoculation. The mortality percentage varied from 37.00 % to 98.66 %. The values of LC50 were of 1.09 x 105 and of 3.8 x 106 conidia/mL, and those of LT50 varied from 5.3 to 7 days. The re-isolated fungus of Z. indianus did not show morphological alterations, however the development of the fungus was improved. The data showed that B. bassiana URM2916 was more efficient; however two analyzed strains were potentially pathogenic to Z. indianus and showed be promising biocontroler agents

ASSUNTO(S)

beauveria bassiana zaprionus indianus micologia controle biolÃgico fungos entomopatogÃnicos zaprionus indianus biological control beauveria bassiana entomopathogenic fungi

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