Use of Haloxyfop-R-methyl Ester in Garlic

Abstract

Two experiments were carried out in Chiang Mai Province during December 1997-March 1998. It was to determine the efficacy of haloxyfop-R-methyl ester [R-methyl-2-(4-(3chloro-5 (trifluoro-methyl)-2 pyridyloxy)phenoxy)propionate) for annual grass weed control in garlic. The herbicides were treated at 30 days after planting with knapsack sprayer in the spray volume 80 l/rai. Haloxyfop-R-methyl ester at the rate 8.64 g ai/rai gave very good control of annual grass weeds; Eleusine indica (L.)Gaerth., Digitaria sanguinalis (L.)Scop. and Echinochloa colona (L.)Link. The application of haloxyfop-R-methyl ester at the rate more than 10.84 g ai/rai provided excellent control of annual grass weeds. Haloxyfop-R-methyl ester at the rate 8.64-17.28 g ai/rai were applied overtop of crop at 30 days after planting showed no phytotoxicity symptom in garlic. The use of haloxyfop-R-methyl ester for postemergence grass weed control in garlic could increase yield up to 7.3-34.7% when compared to non treated plot.