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1.
Rev. bras. parasitol. vet ; 16(4): 243-245, out.-dez. 2007. ilus, tab
Article in Portuguese | LILACS | ID: lil-618369

ABSTRACT

Avaliou-se por meio de um teste de estábulo a capacidade de Metarhizium anisopliae em controlar o carrapato Boophilus microplus. Foram realizados tratamentos em bovinos estabulados, utilizando este fungo aplicando-se suspensão conidial em banhos por aspersão. Os resultados foram obtidos pelo percentual de mortalidade de carrapatos durante 28 dias após o tratamento e pelos índices biológicos após incubação destes em câmara climatizada. Constatou-se 33 por cento de mortalidade no período total observado, sendo o índice de produção de ovos e índice nutricional reduzidos somente em um curto período após o tratamento.


The aim of the present study was to evaluate the capacity of the fungus Metarhizium anisopliae to control Boophilus microplus tick in pen trials. Infested calves were held in individual pen and treated with fungus suspension through aspersion bath. The results were evaluated based on ticks' mortality rate for 28 days after treatment, and on the analysis of biology of tick's samples which were transferred to an incubation chamber. It was reported 33 percent of mortality during the total period analyzed, and the production of eggs and nutritional rates were decreased only for a short period after treatment.


Subject(s)
Animals , Cattle , Cattle Diseases/parasitology , Cattle Diseases/prevention & control , Metarhizium , Pest Control, Biological , Ticks
2.
Rev Bras Parasitol Vet ; 16(4): 243-5, 2007.
Article in Portuguese | MEDLINE | ID: mdl-18373901

ABSTRACT

The aim of the present study was to evaluate the capacity of the fungus Metarhizium anisopliae to control Boophilus microplus tick in pen trials. Infested calves were held in individual pen and treated with fungus suspension through aspersion bath. The results were evaluated based on ticks' mortality rate for 28 days after treatment, and on the analysis of biology of tick's samples which were transferred to an incubation chamber. It was reported 33% of mortality during the total period analyzed, and the production of eggs and nutritional rates were decreased only for a short period after treatment.


Subject(s)
Cattle Diseases/prevention & control , Cattle Diseases/parasitology , Metarhizium , Pest Control, Biological , Ticks , Animals , Cattle
3.
Rev Bras Parasitol Vet ; 14(3): 101-5, 2005.
Article in Portuguese | MEDLINE | ID: mdl-16229753

ABSTRACT

Rhipicephalus sanguineus is responsible for transmitting several pathogenic agents, such as: Babesia sp. and Ehrlichia sp.. This species is known as the brown dog tick and has wide geographical distribution. The purpose of this work was to evaluate the pathogenicity of biological formulations of Beauveria bassiana and Metarhizium anisopliae applied to the fed nymphs and adults of R. sanguineus under laboratory conditions. The following treatments were evaluated: control, distilled water with tween 80, emulsible concentrated, cellulose polymerized gel, fungus mixed with emulsible concentrated, fungus mixed with cellulose polymerized gel and fungus mixed with emulsible concentrated and cellulose polymerized gel. Each treatment was repeated ten times. The survival of fed nymphs and unfed adults was evaluated on the 5th, 10th, 15th and the 20th days after treatments. Significant differences were observed between the treatments (p<0.05). The treatment with M. anisopliae mixed with emulsible concentrated and cellulose polymerized gel showed the lower survival on the 15th and 20th days after treatment. We can conclude that the fungi formulation is harmful to fed nymphs and unfed adults of R. sanguineus in vitro, on this account it is suggested its use for the microbial control of this tick.


Subject(s)
Ascomycota/pathogenicity , Mitosporic Fungi/pathogenicity , Rhipicephalus sanguineus/microbiology , Animals , Nymph/parasitology , Rhipicephalus sanguineus/growth & development
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