Morningglory Control in August Peanut Notes No. 227 2025
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Collapse ▲Question:
I have late season morning glory issue on some of my acres; any herbicide options for this.
Jordan:
Do you know if you have pitted (these have smooth leaves that come to a point) or entireleaf (lots of leaf hairs)?
Follow Up:
Lot of pitted; some of entireleaf as well; mixed bag.
Jordan:
A mix of Cobra plus 2,4-DB is what we have. PHI on Cobra and 2,4-DB is 45 days. Ultra Blazer is 75 days. Aim applied about a week before digging is also available but that’s hard to do logistically. Control with Cobra plus 2,4-DB may not be complete because of coverage, especially the pitted. Cobra is getting the pitted and 2,4-DB is getting the entireleaf. Use 1 pint of 80/20 nonionic surfactant per 100 gallons. Assume you have moisture. There is some risk of injury this late. Not every time but sometimes. Not worried about 2,4-DB but occasionally Cobra will set peanuts back. But Bailey II has a lot of foliage. I do think risk is minimal and you do need to be able to dig. I’d just spray the ones that really need it.
PHI is when you pick and not when you dig. From a legal standpoint, this puts you picking in early October.
Follow Up:
Would 20 gpa help with Cobra and 2,4-DB coverage and would I experience any Cobra burn.
Jordan:
Yes, it would help with coverage and reduce injury to a degree (less concentrated droplets.)