With weed resistance exploding across America’s farmland, Bayer CropScience introduces two new Stoneville cotton varieties for 2013 that give cotton growers more tools to fight weed resistance and rotate herbicide chemistries on their farms.  

ST 4946GLB2 and ST 6448GLB2 are the first Stoneville varieties to offer multiple herbicide tolerance with GlyTol and LibertyLink traits for full crop safety to glyphosate and Liberty herbicides when used as directed. These varieties also have a two-gene Bt trait to protect against yield-robbing lepidopteran pests.

“These new Stoneville varieties give cotton growers the flexibility to spray Liberty and glyphosate herbicides and develop the best herbicide program for their fields and operation,” said Jeff Brehmer, U.S. product manager for FiberMax and Stoneville. “Growers can use full label rates of Liberty or glyphosate herbicides on tough-to-control weeds without damage to the crop.”

ST 4946GLB2 is an early-medium maturing GlyTol LibertyLink Bollgard II variety with exceptional yield potential. It provides herbicide flexibility and crop safety to full labeled rates of Liberty and glyphosate.

It offers root-knot nematode tolerance and is an excellent choice for fields with known presence of this pest. ST 4946GLB2 is easy to manage with moderately aggressive growth habits and is broadly adapted across all cotton-growing regions.

ST 6448GLB2 is a full season maturity, GlyTol LibertyLink Bollgard II variety that provides crop safety to full labeled rates of Liberty and glyphosate. It is well adapted for the south Delta and Southeast cotton-growing areas.

It has excellent seedling vigor, which results in consistent stand establishment. ST 6448GLB2 has outstanding yield potential as well as very good fiber quality, and is well suited for both irrigated and dryland production.

“Both ST 4946GLB2 and ST 6448GLB2 are ideal varieties for those operations with glyphosate-resistant weed issues, but these varieties are not only for the glyphosate-resistant acre,” Brehmer noted.