Allelopathy of cover crop on weed plants - DOI: 10.4025/actasciagron.v28i3.973

Abstract

This work evaluated the cover crop allelopathic potential of wheat, black oat, pearl millet, turnip and rape on the development of weed plants. It also verified which cover crop has larger control on the weed plants. The cover crop was implanted under conventional tillage (one disk plowing plus one disk harrowing) in the Experimental Nucleus of Agricultural Engineering (NEEA), of the State University of the West of Paraná (Unioeste), Cascavel, Paraná State. Monthly (from August 2000 to August 2001), weed plants identification in the cover crop area was made. Results showed that from the found species, the alexander grass was the one that presented larger allelopathic potential, and, the mexican-tea was the one that presented smaller control. The vegetable coverings that presented larger control of the total of weed plants in the experimental area, including those with recognized allelopathic potential, was black oat, rape, turnip and pearl millet.