USA | cornnuts - 9/23/2025 20:40
Are you sure it is morning glory? I ask because I thought I had a morning glory problem. After asking my local coop's crop specialist, it turns out to be Honeyvine Milkweed. Honeyvine Milkweed looks like a species of Morning Glory except when mature the seed pod looks like a Milkweed pod with a smooth surface, without the spurs of a Milkweed pod.
Honeyvine Milkweed is extremely hard to kill. It has tubular root system that needs a systemic herbicide such as Roundup to kill. Roundup is not very good on vines. When it is young it has a small waxy leaf area that is hard to penetrate or have enough surface area for decent coverage. I have killed some of the growth with Roundup, 2-4D or Liberty but it still comes back. The tubulars are 4-6 inches deep in the soil, hard for a pre-merge product to work at that depth. After three years dealing with it I am struggling to find a solution in corn or soybeans. Suggestions?
Over the last three years have found the best option for Honeyvine Milkweed is Glyphosate sprayed with a Drone before corn harvest.
Link is what Honeyvine Milkweed looks like, a lot of people think they have MG, when reality is it is Honeyvine Milkweed.
https://crops.extension.iastate.edu/encyclopedia/honeyvine-milkweed
Edited by coup 9/23/2025 22:28
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Morning Glory Problems in Corn
