Howdy,
Most of our cotton is wrapping up and we're nearing defoliation. There's open bolls scattered around, and the corn and milo is getting harvested. Cutout occurs when cotton is 5 Nodes Above White Flower (NAWF), and at 350 degree days (DD60) past cutout we can stop worrying about plant bugs and bollworms. We can stop worrying about stink bugs at 450 DD60 past cutout, so keep that in mind while scouting and if you are considering treatment. Most of the cotton in the Wharton, Jackson, and Matagorda area is past concern for pest pressure. The bolls they are feeding on past this point are bolls that will not reach maturity by harvest anyway, as the ones that are going to be harvested have grown too hard for them to feed on.
DD60 since cutout:
DD60 since cutout:
If you're still under 450 DD60 since cutout and are looking for stink bugs, pull 10 to 20 bolls about an inch in diameter from four places in the field. Check the inside of the bolls for warts, lesions, and stained lint. The economic threshold for stink bugs is 20% or more of the bolls with internal damage and stink bugs present. Some of the brown stink bug populations in our area have also been shown to have some resistance to pyrethroids.
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| Green Stink Bug adult Photo: Kate Crumley |
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| Carpal Wall Warts from Stink Bug feeding damage Photo: Kate Crumley |
Stay dry and happy harvest everyone!
Sincerely,
Kate Crumley
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