Bayer CropScience’s Fibermax brand is the second most planted nationally, followed by Dow AgroScience’s Phytogen brand, Americot, Bayer CropScience’s Stoneville brand, Dyna-Gro, and All-Tex., reports the USDA.

USDA reports that Bayer CropScience’s Stoneville Upland varieties have 13 percent of the Arizona market share. The company’s FiberMax Upland brand has a 9 percent market share (22-percent combined).

Ninety-nine percent of the U.S. cotton crop is transgenic varieties. 

Cotton growers turned out in strong numbers at the Bayer CropScience Cotton Field Day hosted by David Stambaugh at Stambaugh Farms in Eloy (Pinal County).

Kenny Melton, Bayer CropScience principal agronomist, led the field tours, showcasing Stoneville 4946GLB2 in its commercial debut this year on the Arizona market.

“Stoneville 4946GLB2 is an early- to mid-maturing variety designed to replace Stoneville 5458B2RF and Stoneville 4498B2RF. Stoneville 4498B2RF has been a mainstay in Arizona,” Melton said.

Stoneville 4946GLB2 produced better yield and fiber quality than the two other varieties in Arizona field tests, Melton says, plus has tolerance to the root knot nematode.

Stoneville 5458B2RF should be on the market for a few more years while supplies of Stoneville 4498B2RF will be limited next year.

“We are not replacing Stoneville 4498B2RF lightly,” Melton said. “We know we have to out yield it. We believe Stoneville 4946B2RF will outperform Stoneville 4498B2RF.”

Stoneville 4946GLB2 cotton holds slightly tighter in the burr than Stoneville 5458B2RF.

At another stop, Melton said Stoneville’s 6448GLB2 variety is a mid- to full-season variety with good fiber quality and yield.  

“Stoneville 6448GLB2 is unique since the Stoneville line did not previously have a variety in this maturity class. Stoneville 6448GLB2 is more of a full-season variety with good yield and fiber quality.”

2013 is the first year on the commercial market with limited seed availability for Stoneville’s 4946GLB2 and 6448GLB2 varieties. Melton says plenty of seed will be available next year.

On the FiberMax side, FiberMax 1944GLB2 is an early- to mid-season maturity but more on the mid side, Melton says. It comes out of the same background as FiberMax 1740B2F, but is a slightly longer-season variety with more aggressive growth.

“FiberMax 194GLB2 has significantly better fiber quality than FiberMax 1740B2F,” Melton said.