. Agri-news. Agriculture. Herbicide resistance Seeding is over and it's time to trunk about spraying crops. Deciding which herbicide to use can be difficult. "Choosing a herbicide correctly takes several variables into ; says Agnes Vt hiting. crop specialist - cereals/oilseeds with Alberta Agriculture, Food and Rural Development. "The decision is firstly based on the ability of a herbicide to control the target weed and if a similar acting herbicide was used in a field the previous year Herbicide resistant weeds are a growing problem and rotating the herbicide grou
. Agri-news. Agriculture. Herbicide resistance Seeding is over and it's time to trunk about spraying crops. Deciding which herbicide to use can be difficult. "Choosing a herbicide correctly takes several variables into ; says Agnes Vt hiting. crop specialist - cereals/oilseeds with Alberta Agriculture, Food and Rural Development. "The decision is firstly based on the ability of a herbicide to control the target weed and if a similar acting herbicide was used in a field the previous year Herbicide resistant weeds are a growing problem and rotating the herbicide group used the same way crops are grown in rotation is the best defense against this ; Herbicides are divided into IS different groups based on their chemistry and how thev control weeds. The following listed groups include: Group 1 - Select. Horizon. .Assure. Poast. Achieve Group 2 - Muster Pursuit. Ally. Champion Plus Group 3 - Edge. Fortress. Rival. Trefian Group 4 - Attain. Curtail M. Banvel Group 5 - Atrazine, Crossfire. Sencor (iroup 6 - Achieve Extra. Laser. Unity Group 7 - Karmex. Afolan. Stampede EDF (iroup 8 - Avenge 200-C. Avadex BW. Fortress Group 9 - Laredo. Roundup, Rusder Group 10 - Liberty Group 11 - Amitrol-T Group IS - Dual. Pnmextra Light. Kerb SOU Group 22 - Reglone. Gramoxone Group 2S - Mataven L Group 26 - TCA Herbicide resistance develops when herbicides from a group are repeatedlv used in the same field, savs Whiting. The weeds are under selection pressure This selection pressure removes the weeds from the field that are susceptible to the herbicide leaving the weeds that are resistant to multiply and become the dominant population Selection pressure can create a resistant populauon in as little as four ; Herbicide rotation mav mean using a product not as effective in controlling the weed, or more expensive However this is far better and cheaper than having a herbicide resistant weed population that can't be controlled There ar
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