Bracken fern poisoning to cattle raised in Parana State, Brazil.

Abstract

The author presents a revision about bracken fern (Pteridium aquilinum, L. Kuhn), in cattle, raised in the state of the Paraná. This toxic plant represents huge damages to the creators in the state and is being disseminated quickly, becoming the toxic plant of negative consequences to the health of the cattle. The author also describe climatic and environmental conditions about proliferation of Bracken fern in the Parana state, Brazil.