Competitive Effects of Annual Weeds on Spanish Peanuts

Peanut (Arachis hypogaea L.) yields were not influenced by weeds that were removed within 3 weeks after planting and each week thereafter, but a yield reduction did occur when weeds were not removed until 4 to 8 weeks after planting. Peanuts kept weed free at least 6 weeks after planting showed no yield loss due to competition from weeds emerging later. As weed competition increases, peanut seed yield, forage yield, and soil moisture content decreases.