Patogenicidad de los hongos Verticillium lecanii (Zimmermann) Viegas y Beauveria bassiana (Balm) Vuilleman a animales homeotermos

Abstract

The entomopathogenous fungus Verticillium lecanii (Zimm) Vieg (stump LBVl-2) and Beauveria bassiana (Balm) Vuilleman (stump LBBb-32) are broadly distributed and they have been evaluated under laboratory conditions against a great number of insect plagues as Anthonomus grandis Boheman, Bemisia spp. and Trialeurodes vaporariorum (Westwood), Schistocerca gregaria (Forskal), Plutella xylostella (Linnaeus) and aphids among other arthropods, that endorses their use in the control of plagues in the agriculture. The pathogenic action of those fungis was evaluated in mice and guinea pigs, providing them a conidium suspension of stumps in intraperitoneal applications and through the vagina. The possible pathogenic action of the fungal biopreparations from the above mentioned fungus was evalued, when they were given to mice through the nasal openings, with food and water and by contact, when the animalss body was sprinkled with the entomopathogenous solution. These last two trials were also valued on dogs and cattle. The applications on mice and cattle were carried out weekly during 6 months and were observed during 18 months, while the applications on dogs and cattle were done weekly, during the first two months and later every 30 d until turning two years. The animals subjected to treatments with V. lecanii and B. bassiana didnt show clinical alterations that could be registered by the veterinary; besides they didnt present either
tissues or organ alterations or presence of the microorganisms studied.