Efficacy of propaquizafop on grass weed control in garlic

Pornchai Lueang-a-papong; Prisana Poonchaisri; Somsit Chamnansilp . Faculty of Agriculture. Dept. of Agronomy

Efficacy of propaquizafop on grass weed control in garlic

1994

Pornchai Lueang-a-papong | Prisana Poonchaisri | Somsit Chamnansilp (Chiang Mai Univ., Chiang Mai (Thailand). Faculty of Agriculture. Dept. of Agronomy)

Three experiments were conducted in Sanpatong and Doi saket, Chiang Mai during December 1994 - March 1995. The objective of the study was to determine the efficacy of propaquizafop (2-isopropylideneamino-oxyethyl(R)-2-[4-(6-chloro-quinoxalin-2-yloxy]propionate) on annual grass weed control in garlic. The herbicide was applied as postemergence to garlic at 28-30 days after planting with knapsack sprayer in the spray volume 80 liters/rai. It was found that propaquizafop at the rate of 10-12 g(ai)/rai provided excellent control of annual grass weeds Digitaria adscendens (H.B.K.)Henr, Eleusine indica (L.) Roem.& Shultl. and (Echinochloa crus-galli L.Beauv.) The application of propaquizafop at the rate up to 12 g(ai)/rai showed non phytotoxicity in garlic. The use of propaquizafop for annual grass weeds control could increase yield of garlic up to 24 percent compared with non-weeded plot.

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