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Subject: Urochloa decumbens (Staph) R. D. Webster (=Brachiaria decumbens), grass introduced in Brazil as promising pasture crop, now considered major weed
Date posted: April 17, 2003
Source: Pitelli, R.A., R.A. Reis, and R.C.L.M. Pitelli. 2003. Brachiaria decumbens, a major exotic invasive plant in Brazil. WSSA Abstracts 43: 23.
Urochloa decumbens (Staph) was introduced to savannah areas of the Central-North regions of Brazil as a promising pasture crop for distrofic soil. Since its introduction, this grass has shown satisfactory establishment and growth but has since escaped from the rangelands and in less than 15 years has spread over the whole savannah area and into other biomes such as the Atlantic and Tropical Rain Forest. This weed is also replacing native plants and reducing the biodiversity (many herbivores reject U. decumbens as forage). Currently in Brazil, U. decumbens is considered a major weed in forestry, citrus, sugarcane, horse pastures, and along roadsides and is considered an important weed in other crops such as maize, soybean, and cotton.

Note: The abstract published by Pitelli et. al (2003) used the name Brachiaria decumbens, which is a synonym of Urochloa decumbens, the valid name (see Urochloa species search on the following website: http://www.hear.org/gcw/index.html).