Replanting Twin-Row Peanuts Peanut Notes No. 90 2023

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Question:

I have a grower that plants twin row peanuts. How many plants per linear foot are needed in the twin row system to justify not replanting?

Jordan:

My rule of thumb is that if you have 3 plants per foot of row, regardless of whether it is twin row or single row, I would move forward without replanting. My recommendation would not change based on planting pattern. Less than three plants, I would plant four seed per foot of row (total for both twins, so 2 seed per foot of row for each unit of the twin row pattern.) Twins are unique, and I always recommend about 15% more seed compared with single rows. So, if you are replanting the twins, it might end up that you place 5 seed total (3 plus 2, on average.)

I also suggest that inoculant and insecticide for thrips be reapplied. This does get expensive but the new furrows need these and you can’t rely on the old seed furrows. Go with an inexpensive option for thrips (imidacloprid) but be ready for an acephate spray if needed (but hopefully the imidacloprid will give you enough suppression of thrips to get through most of June.) Thrips populations will generally decrease as we move to the middle and latter parts of June. Peanuts will also tend to outgrow the damage when it gets warm and they are growing for our plater plantings.
A big challenge is the gaps. Stands are often not uniform. You could average 3 plants total per foot of row but have significant gaps. In my experience the average for the field might be 3 but there are gaps. That warrants a replant, depending on the magnitude of the gaps.
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