Control Effects of Crabgrass (Digitaria sanguinalis L.) in Kentucky Bluegrass (Poa pratensis) by Spraying Metamifop with High Concentration and Ultra Low Volume
Young-Rae Cho1,* Yong-Sup Cho1 Joon-Soo Choi2
1Dong Sung Green Co., Ltd., Yongin 17088, Korea 2Department of Green Landscape Architecture Science, Dankook Univ., Cheonan 31116, Korea
This study was conducted to investigate effects of crabgrass (Digitaria sanguinalis L.) control in Kentucky bluegrass by spraying metamifop with high concentration and ultra low volume. As applied with metamifop in pot experiment, control efficacy of crabgrass in 25, 1 and 0.2 mL m-2 treatment was 91.9, 92.6, and 29.2%, respectively. Compared to control (25 mL m-2), 1 mL m-2 ultra-low volume (ULV) treatment was not significantly different. When treated 0.1 mL m-2 metamifop in field experiments, control efficacy of 1 mL m-2 ULV was 90.3% and similar to that of control. Compared to application of metamifop, control efficacy of crapgrass of 0.1 mL m-2 and 0.2 mL m-2 metamifop treatment was 90.3% and 91.2%, respectively, and not significantly different. These results showed that ultra-low volume spraying of metamifop could be applied to control crapgrass in Kentucky blurgrass field and reduced water volume.