Cotton Tobacco Peanut News

— Written By Al Cochran

Tobacco News

           According to a recent survey from Martin County Farmers that attended our tobacco production meeting, about 50% of the tobacco acreage is planted in NC 196. This is good yielding variety and has good resistance to Race 0 Blackshank but low resistance to Race 1.  This variety has the pH gene for resistance and varieties with this form of resistance are likely to change the make up of the Blackshank race, when use in the same field over time. If you have been using a pH Gene variety like NC 196 for many years, you may start to see more Blackshank as the race changes from Race 0 to Race 1. This is just something to think about as there are some varieties that have resistance to Blackshank, but do not have the pH gene.

           There seems to be an issue with weed seed in processed tobacco and the China export market. When tobacco is harvested, weed seed will stick to the leaf and it is practically impossible to remove them during processing. We don’t think this is a serious problem, as most tobacco fields have few weed plants going to seed. This is something that the exporting industry is trying to address and was discussed in the Tobacco GAP meetings this year. The industry is trying to be proactive on this issue, and not make it a marketing problem for our crop. Over half of our tobacco production is exported and we don’t want to loose that market.

Cotton News

           Brake F2 is a new cotton herbicide that is labeled for cotton. It has a different mode of action that other herbicide that are available in cotton and does well controlling Palmar Amaranth. It is in the same family of herbicides as the old product Zorial, and has bleaching effects on plants.

           To help control resistant Palmar Amaranth one needs to apply a residual herbicide several times during the season. Depending on products like Liberty to clean up escapes can be risky. Liberty only works on small weeds, 6 inches or less, and the timing can be a problem when rainy weather sets is.

           Also according to Alan York, there is some differences is how tolerant different Widestrike cotton varieties are to Liberty. Liberty seems to burn some varieties more than others. To be completely safe when using Liberty herbicide, you can use a Liberty Linked cotton variety, as these have excellent tolerance to Liberty.

           In research plots Admire Pro applied in furrow at 9 OZ per acre, has looked good in controlling thrips. This is applied with a stainless steel nozzle with a single orifice sprayed in-furrow.

Peanut News

           Admire Pro is also labeled for in-furrow application on peanuts. Thrip control looks as good as applying Thimet in furrow, and Admire Pro has not caused any stand problems, as seen sometimes when othene is applied in-furrow. Admire Pro can be mixed with a peanut in-furrow inoculant.

           Warrant now has a label for peanuts. Warrant has been used in cotton for some time and just got a label for peanut this year. It is used similar to how Dual is applies, as a pre-plant, or can be applied post-emerge. It works well as a residual product to help control resistance weeds.

Written By

Photo of Al CochranAl CochranCounty Extension Director (252) 789-4370 al_cochran@ncsu.eduMartin County, North Carolina
Posted on Mar 14, 2014
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