Effects of Haematobia irritans infestation on weight gain of Nelore calves assessed with different antiparasitic treatment schemes.
Prev Vet Med
; 118(1): 182-6, 2015 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-25465474
Effects of Haematobia irritans infestation on weight gain of 18 to 20 months old non-castrated Nelore calves, were investigated, under field conditions, using different antiparasitic treatments. Sixty animals were divided in three groups, with 20 bovines each: T01 (untreated control); T02 (treated with Cypermethrin 15 g+Chlorpyriphos 25 g+Citronellal 1 g, as a whole body spray, on days 0, 30, 60, 90 and 120 post-treatment); and T03 (treated on day zero with an ear tag impregnated with Diazinon 6g on the left ear). Counts of H. irritans were conducted on day 30, 60, 90, 120 and 150 post-treatment (DPT). On the same experimental dates, animals were individually weighed, seeking to evaluate the effects of parasitism on the development of animals in each group. From this study it is concluded that T03 had significantly higher efficacy (>90%, till 90 DPT), based on H. irritans fly counts, compared to T02 which showed little or no effect. At the specific conditions of the present study, an average of approximately 90 flies (mean difference of flycounts between groups T01 and T03) was associated with a difference of 20 kg/animal in 150 days.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Piretrinas
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Muscidae
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Aumento de Peso
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Doenças dos Bovinos
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Cymbopogon
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Diazinon
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Clorpirifos
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Inseticidas
Limite:
Animals
Idioma:
En
Revista:
Prev Vet Med
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Holanda