The Big Sandy Mountaineer -

Soil Acidity Round Table

Discussion in Fort Benton

“What did we learn in 2018”

Producers, Educators and Agri businesses are invited to attend a soil acidity round table discussion on November 7 from 1:00 p.m. to 4:00 p.m. at the Community Bible Center located at 1600 Main in Fort Benton. All present will have the opportunity to share what they have learned about soil acidity and soil acidity management in 2018. Chouteau County Conservation District will provide coffee and cookies.

New Herbicide-Resistant Russian Thistle Montguide Available

Information for this article comes from Montguide MT 201816AG. Authors include Dr. Prashant Jha from MSU Southern Agricultural Research Center, Peggy Lamb, Northern Agricultural Research Center Agronomist, and a group of County Extension Agents from the Golden Triangle. The complete document is available online or at the Chouteau County Extension Office. Our office is located in the green building next to the courthouse.

Herbicide -resistant plants often develop from repeated use of a single mode of action herbicide. Plants can develop resistance to additional herbicides, and then require integrated, and more costly management techniques. As of March, 2018, glyphosate-resistant Russian Thistle has been identified in Chouteau County, with more counties likely to be added as testing continues.

All Integrated Pest Management recommendations are available in the Montguide. Herbicide options for glyphosate-resistant russian thistle in wheat and barley include the following:

• Talinor: Post-emergent at a rate of 13.7 fluid ounces per acre. Treatment includes groups 27 and 6.

• Bronate Advanced: Post-emergent at a rate of 25.6 fluid ounces per acre. Treatment includes groups 4 and 6.

• Starane NXT: Post-emergent at a rate of 27.4 fluid ounces per acre. Treatment includes groups 4 and 6.

• Huskie: Post-emergent at a rate of 15 fluid ounces per acre. Treatment includes groups 6 and 27.

• Kochiavore: Post-emergent at a rate of 1.5 pints per acre. Treatment includes groups 4 and 6.

Burndown options for glyphosate-resistant russian thistle in fallow:

• Sharpen +2,4-D LV4: Post-emergent at a rate of 2 fluid ounces per acre of Sharpen and 8 fluid ounces per acre of 2,4-D LV4. Treatment includes pesticide groups 14 and 4.

• Gramoxone SL: Post-emergent at a rate of 32-48 fluid ounces per acre. Treatment includes group 22.

•Kochiavore: Post-emergent at a rate of 2.5 pints per acre. Treatment includes groups 4 and 6.

Herbicide options for glyphosate-resistant russian thistle control in dry pea: