Abstract

Hieracium pilosella is classified as a noxious weed at the Chilean Patagonia. Its explosive expansion represents an economic loss for livestock production because its great competitive ability impedes growth of more productive species. Its expansion is due to soils degradation caused by overgrazing. There are different types of weed control such as chemical, mechanical and biological, but H. pilosella control and eradication require proper animal management to prevent soil degradation and an integrated preventive management to avoid the spread of the plant.