Ação de fungos entomopatogênicos sobre Bovicola caprae (Phitherapta mallophaga, EWING, 1936) em caprinos naturalmente infestados em clima de semi-arido.

Abstract

The lice illness goats is a constant production threatens of Semi-arid extensively created goats because, it presents high infestations whole year, interfering economically in productive system. The entomopathogenic fungi as the Beauveria bassiana, Metarhizium anisopliae and M. flavoviridae come demonstrating to be an alternative in the insect-plague control, which has reflex in the effectiveness, in the cost, in the man's safety and of another organisms, in the reduction of chemical residues in the victuals and environment, in the natural enemies preservation and in the increase of the biodiversidade in the ecosystems. The objective of this study was of evaluating, under controlled and field conditions, the entomopathogenic fungi Beauveria bassiana, Metarhizium anisopliae var. anisopliae and Metarhizium flavoviridae on Bovicola caprae in semi-arid paraibano naturally infested goats and the viability of this fungi pos-treatment. The pos-treatment infestation was potentially reduced in controlled rehearsal, with prominence for B. bassiana. It was observed that after 12 hours of inoculation conidiogenese fungi starting from infected louse. Under field conditions, B. bassiana treaty group concentrated the largest number of goats with zero level of lice infestation after bioinseticide treatment. M. anisopliae var. anisopliae treaty group, also, presented promising results in neck, back and croup areas. These results point new alternatives for lice illness control in small ruminants productive systems, however it is made necessary fungi physiology study about its lice infection under semiarid conditions and its permanence in ecosystems.