Oklahoma Cotton: 2018 Drought; Resistant Bollworm Horror

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The 2018 drought continues with 87.62 percent of the state in drought, rainfall over the past 14 days has not been sufficient to alleviate this situation. The seven day forecast has increasing chances for rain. Hopefully this will occur.

The crop state wide is developing well where moisture is not limited. Hard decisions had to be made in some fields where moisture was not adequate, with yield potential being so low termination of the fields was the best economical decision. The abandonment as of July 13 was at 15 percent. If rainfall does not occur soon on drought stressed, rainfall dependent fields these, too, shall be terminated.

Insect pressure is increasing. Bollworm infestations in Jackson County were discovered where the pest growth stage exceeded the size where the bt gene could control them. Control measures had to be used. These infestations all happen in varieties that did not have the VIP technology.

Horror stories out of East Texas of Bollgard II being overwhelmed and the majority of bollworms being tested were resistant to this technology. In fields that do not have the VIP technology, extra time and effort needs to be used to not allow this pest to cause economic damage.

Beet armyworm infestation in the Caddo and Blaine County area is occurring in peanuts, silage fields and sunflowers. More reports of spider mites occurring are also being reported, no control measures have been made however.

AgFax Weed Solutions

I cannot stress enough scouting of the field must be on a weekly basis until termination of the crop.

Bollworm injury in Bt varieties has been increasing in the past three years. This makes scouting for this pest crucial. The economic threshold is 6% damaged squares with live worms present in Bt cotton.

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