This week we've been finding some stink bugs and some bollworms in cotton in all three counties. Currently we are mostly finding damage and newly hatched larvae. As the grain continues to dry down, expect to see more moths moving around. Bollworm eggs are small, round, generally singly laid, and have ridges meeting at the top of the egg. These insects are highly cannibalistic, and will eat each other if more than one larvae is on a leaf. The photo below has two eggs, but I would count this as one egg while scouting, since only one of those would live long enough to feed on the plant. The eggs can be found anywhere on the plant, generally on the tops of leaves. This week we have found more eggs in the mid canopy. Sometimes eggs are even laid on flowers and bloom tags. We're still finding stink bugs in cotton as well. This week we found a few nymphs in Jackson and Matagorda counties.
Bollworm Eggs Photo: Kate Harrell |
Headworms and stinkbugs are in sorghum right now. The best way to scout for damage from these insects is to use a bucket. Rattle a grain head around in a bucket to see what falls off of it. Adult stink bugs will fly, often very quickly after being knocked from the plant, so be aware of anything taking off when you go to look in the bucket. Folks in all three counties have been treating for stink bugs lately, but the earlier planted sorghum is hardening enough to be past the point of concern. Check out the rice stink bug calculator and the sorghum headworm calculator to check economic threshold levels.
Lady Beetle Eggs |
Give me a call if you have questions or concerns.
Sincerely,
Kate
For more information check out:
Danielle Sekula's Pest Cast
Stephen Biles' IPM Update
Robert Bowling's Rolling with Bowling
Texas Sugarcane Aphid News
Texas Row Crops Newsletter
Using Mepiquat Chloride on the Texas Coast to Reduce Cotton Plant Height
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