EFICÁCIA DE NÚCLEO HOMEOPÁTICO NA PREVENÇÃO DA INFESTAÇÃO POR Dermatobia hominis E Haematobia irritans EM BOVINOS

O presente trabalho foi desenvolvido na UFPR - Campus Palotina - Paraná e em uma propriedade rural do município de Mundo Novo - Mato Grosso do Sul, durante o período de maio de 2002 a abril de 2003. O experimento foi delineado com os objetivos de avaliar: a) a eficácia do núcleo homeopático (nosódicos CH12, sacarose e Bixa orelhana) na prevenção da infestação natural por larvas de D. hominis e H. irritans em bovinos de corte e b) a dinâmica populacional de D. homins e H. irritans ao longo do ano. Para sua realização foram utilizados 24 vacas, de aproximadamente 15 meses de idade, distribuídas em dois grupos de 12 animais, com pesos médios semelhantes. Os animais do grupo A foram tratados com núcleo homeopático adicionado à suplementação mineral na proporção de 400 g de núcleo adicionado em 25 Kg da mesma. Os animais do grupo B receberam suplementação mineral (sem adição de núcleo homeopático). Foram contadas um total de 451 larvas de D. hominis. A análise de variância demonstrou diferença estatística significativa (

Effect of body development from first insemination to first weaning on performance and culling until the third farrowing of Landrace x Large White swine females

The aim of this study was to verify the association of sow body weight development until the 1st weaning with reproductive performance, piglet production and culling rate until the 3rd farrowing in 196 primiparous sows using logistic regression models. Each 10kg increase in weight gain in the 1st pregnancy (OR= 0.63), weight at 1st farrowing (OR= 0.70), weight at the 1st weaning (OR= 0.73) or weight gain from the 1st artificial insemination (AI) to the 1st weaning (OR= 0.67) decreased the percentage of primiparous sows with long weaning-to-oestrus interval - WOI (>5 days). An increasing lactation length and an increase in the number of weaned piglets were responsible for respectively decreasing (OR= 0.77-0.80, per day of lactation) and increasing (OR= 1.52-1.59, per piglet weaned) the percentage of sows with long WOI. Sows with 170kg (OR= 4.73). Sows with 30kg. Each additional lactation day decreased the NFR (OR= 0.74). Females weighing 35kg. Each 10kg of increase in weight at the 1st weaning or in weight gain from the 1st AI to the 1st weaning decreased the total culling rate (OR= 0.71 and 0.73, respectively) and culling for reproductive reasons (OR= 0.57 and 0.61, respectively). The culling rate until the 3rd farrowing was also increased in sows with a smaller first litter size. The results show that not only reaching a minimum weight at the 1st AI but also having an adequate body weight gain until the 1st weaning is important for the reproductive performance, productivity and retention of Landrace x Large White Danbred sows in the herd