[Larvae culture of ovine gastrintestinal nematodes in sawdust substrates of Pinus taeda, P. elliottii and Araucaria angustifolia].

The aim of this study was to verify the influence of sawdust substrates obtained from wood treated with sodium tribromophenate and not treated of Pinus elliotti, P. taeda, and Araucaria angustifolia in larval cultures of ovine gastrintestinal helminths. Feces samples were collected between 8 to 12am, from a lamb naturally infected with gastrintestinal nematodes and analysed by the modified Mc Master technique for worm egg counting (epg).

[Seasonal variation of Haematobia irritans in the Santa Catarina State plateau and eficiency of the "Directed Control"].

This experiment had the aims of collecting information about seasonal variation; to evaluate the efficacy of the directed control method, in which only the most susceptible animals to Haematobia irritans infestations are treated and to reduce treatment costs. From February 2001 to April 2003, in two farms situated in Lages, Santa Catarina State, Brazil, two groups of 17 adult animals each (one group per farm) were used to count fly infestation every 14 days. In farm I, 29.