Texas Upper Coast Cotton: Stink Bugs, Verdes, and Bollworms

    Verde plant bug on cotton leaf. Photo: Kate Harrell, Texas AgriLife Extensions

    This week has been a bit muddy, so I’ve been in and out of the field. The rain has perked up a lot of our cotton and corn, and we really needed it.

    This week I was picking up a few Verde plant bugs and some stink bugs (mostly green, a couple brown) in Jackson county. The damage I found was minimal, and I only found adult insects, no nymphs yet.

    With stink bugs and other plant bugs, it is important to look for feeding damage. The decision aid charts below have photos of feeding damage. The photo below shows the carpal warts on the inner wall of a boll. The lint and seed on this boll was also discolored.

    This is typical stink bug feeding damage. Adults can move around a great deal, they are strong fliers and may move out of a field quickly.

    Once nymphs start hatching out, we will need to monitor more closely for damage. They can’t fly away, and can cause more damage over time without being able to leave.

    Check a minimum of 25 bolls for feeding damage, and at least 1 per acre of field. If 20% of the bolls are damaged and stink bugs are present, consider treatment.

    I have been hearing about bollworm damage starting to crop up in terminals and squares in Matagorda county. So far I haven’t seen any live larvae, only empty damage.

    We need to start keeping an eye out for egg lay in fields and watching for larvae. Remember not to treat for egg lay, and if you are counting eggs, only count one per leaf. Bollworms are highly cannibalistic, and double egg lay like in the photo above will likely only result in a single larva.

    Verde Plant Bug. Photo: Kate Harrell

    Creontiades Action Threshold. Click Image to Enlarge

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    Green Stink Bug. Photo: Kate Harrell

    Carpal warts caused by feeding damage. Photo: Kate Harrell

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    Bollworm Eggs. Photo: Kate Harrell




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