Hotshot~* Herbicide: the new standard for control of Fallopia convolvulus in winter cereals in the Northern Grain Region

摘要

From 2002 to 2005, Dow AgroSciences have been testing a new combination of herbicides for the control of black bindweed (Fallopia convolvulus) and associated broadleaf weeds in winter cereal crops in northern New South Wales and southern Queensland. Hotshot~* herbicide (10 g L~(-1) aminopyralid + 140 g L~(-1) fluroxypyr MHE) at rates of 500 to 750 mL ha~(-1) applied as a broadcast application, gave effective control of black bindweed. The addition of metsulfuron-methyl at 3 g a.i. ha~(-1) or MCPA LVEat 350 g a.i. ha~(-1) to Hotshot increased the spectrum of broadleaf weed control. Hotshot control of black bindweed was more reliable than Tordon~* 242 Cereal Herbicide (26 g L~(-1) picloram K salt + 420 g L~(-1) MCPA K salt) across sites, seasons andincreasing growth stages. The addition of aminopyralid to fluroxypyr improved the control of black bindweed compared to fluroxypyr alone as well as providing residual control of second germinations of black bindweed. Hotshot is also completely compatiblewith Topik~(R) 240EC (240 g L~(-1) clodinafop + 60 g L~(-1) cloquintocet-mexyl) and Wildcat~(R) 110 (110 g L~(-1) fenoxaprop-P-ethyl + 30 g L~(-1) mefenpyr-diethyl) for the control of ludo wild oats (Avena sterilis ssp. ludoviciana (Durieu) Nyman).