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Class Of ’09 Touts Two New Varieties

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Recap: Class Of 09 Touts
Two New Varieties


Richard Davis
Davis Agricultural Consulting
Montgomery, Alabama

DP 0924 B2RF and DP 0935 B2RF were in my Deltapine Field Advancement Cotton Trial (FACT) in 2008. DP 0935 B2RF yielded about the same as DP 555 BGRR with DP 0924 B2RF’s yields slightly lower than DP 555 BGRR. I believe DP 0935 B2RF is best suited for growers in central and south Alabama, while DP 0924 B2RF is more suited to north Alabama with its shorter growing season.

Monsanto’s D&PL business also has other varieties (DP 0912 B2RF, DP 0920 B2RF, DP 0924 B2RF, DP 0935 B2RF and DP 0949 B2RF) that are candidates to replace DP 555 BGRR. Variety trials from across the Southeast show that DP 0935 B2RF’s yields and fiber characteristics are very similar to DP 555 BGRR. I will suggest that my growers in central Alabama plant a portion of their acres in one or two of these new varieties to evaluate them on their farms.

It is very important that we move to the double gene Bollgard II® varieties to decrease the chance of resistance. Growers in central Alabama know the value of Bollgard® technology and will do what is necessary to keep it. Bollgard II is more effective on bollworms and controls armyworms and loopers. This should mean fewer insecticide applications for most growers. Roundup Ready® Flex provides more options in timing herbicide applications.

The new numbering system for Deltapine varieties will help growers choose varieties suited to their area. Each variety has a four-digit number. The first two digits indicate the year of release, and the second two show relative maturity. Low relative maturity numbers refer to early season varieties; higher numbers signify full-season varieties.

In central Alabama, plant bugs are not as much of a problem as they are in north Alabama or the Mid-South. However, we do have tarnished and cloudy plant bugs, which usually build up to damaging levels around Aug. 1. The nectarless trait in DP 0935 B2RF could help us suppress plant bugs, so that we won’t have to treat for them.

In my opinion, DP 0924 B2RF will be used for late-planting situations in central Alabama. Most growers try to take advantage of the full-season varieties that can rebound from in-season stresses and still make a crop. Also, DP 0924 B2RF should fit well with the shorter growing season in north Alabama.


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