A documental research of 63 livestock owners and managers with chronic poisoning by Pteridium' genotypes of the Municipalities of Sapopema and Sao Jeronimo da Serra, Parana State, Brazil, was carried out with the purpose of evaluating the attitudes, behavior and knowledge level of rural producers of the chronic toxicosis and weed syndromes, in order to design strategies focused minimizing on economical features in those geographical areas. In the farms visited, the 1.6% of the animals showed clinical sings of the losses, being females 3 to 5 years old the most affected. Of the clinically sick animals, 96.1% showed bovine enzootic hematuria (BEH) symptoms, including animals not older than 2 years old and 3.9% were identified with upper alimentary syndrome (UAS). The 10.3% of producers admitted that cows with BEH were regularly milked. This and other observed facts were a cause of growing concern in public health issues. 61.9% of the owners used various paliatives because hey have strong believes in recovering the affected animals and selling them, because they have strong believes in recovering the affected animals and selling them afterwards. On the other hand, it is clear that important reforms heading to the establishment and improvement of the pasturing fields are absent, for strategies of supplementary feeding are not being planned, although rural owners are concern about poisoning because of its serious economic consequences, effects on public health, not with standing. Such behavior obeys to cultural reasons, lack of information and financial conditions. This compromising result require the urgent intervention of the public sector to adopt educative actions that can modify in an effective way the today's behavior and also begin an integrated program to control the problematic situation.
