Soybean School: Drought Leads to Green Stem Syndrome

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Drought conditions in Ontario could slow harvest in some soybean fields this fall where plants suffer from Green Stem Syndrome.

In this edition of Real Agriculture Soybean School, Pride Seeds market agronomist Dan Foster explains Green Stem Syndrome happens when there is partial or complete leaf drop but the soybean plant stem remains green. “The beans are ripe, ready to combine, but we’re stuck with a green stem. It really affects combinability and, in an IP soybeans situation, you can end up with some staining,” says Foster.

What causes Green Stem Syndrome? “When we’re super dry or under a stress, soybeans start to abort flowers. If we start aborting flowers at nodes and the soybean plant is still moving nutrients up and down that plant it has nowhere to shove those nutrients out to create a seed. All those sugars and nutrients then get stuck inside the stem and it won’t dry down because they have nowhere to go.”

In the video, Foster discusses management options in IP situations, which includes burndown with glyphosate. In glyphosate-tolerant situations, Foster recommends several herbicide options, including Eragon herbicide.

Click here for more Soybean School episodes.

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Soybean School (view all)Season 5 (2016) Episode 11
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