Dan Anco Clemson Peanut Notes No. 154 2024

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I would like to follow up and correct previous comments I made on 7-3-24 regarding possible zinc toxicity. The stunted peanut seen in that field were rather more likely the result of a noted sprayer hose coming detached during the Gramoxone + Storm application (thank you kindly, Fleming McMaster). This accounts for the pattern of symptoms being contained in a pass and more concentrated at one end. The amount of zinc in that spot of the field from the soil samples (less than 10 lb/A) was also lower than when we typically see leading to strong toxicity symptoms. The peanut in this field are recovering well, whereas with zinc, recovery from elevated toxic concentrations tends not to happen or at least I have not seen it.
For comparison, the second set of pictures is from a different field where high soil zinc levels accompanied characteristic symptoms of toxicity. There, it was the first time peanut was grown on that land and so some of the field history was learned during the course of the year.
The third set of pictures includes a chimera which can look like tomato spotted wilt virus. Chimera is a genetic happening that does not spread in a field and does not cause economic loss.

Peanut images 7-16-24

 

Dan Anco

Extension Peanut Specialist and Associate Professor

Department of Plant and Environmental Sciences

Clemson University – Edisto Research and Education Center

64 Research Road

Blackville, SC 29817

630-207-4926 cell

danco@clemson.edu