Question About Accidental Application of Glyphosate on Peanut

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I am going send you two additional Peanut Notes that have data from Georgia and North Carolina. The data from NC do not apply well to applications now. Dr. Prostko’s data are more appropriate in that he had applications spaced over the growing season at different rates. We also have worked with him on timing of Liberty and Dicamba. I am going to send those papers as well. I know this is a lot to read and you most likely will not get around to it. Art had a question and I did not get back with him Friday with an answer. We had a farmer in Bertie County apply either 1 or 2 pints of Roundup (thinking it was a growth enhancing product) and he lost 10 to 20 acres. The peanuts never recovered. Most farmers are applying that rate or close to it for weed control in the appropriate crops. But, sometimes farmers might pick up a container with Roundup in it and no label and might use a surfactant rate thinking it is surfactant. At 1 quart per 100 gallons (0.25%) in 15 GPA, this is only 0.15 quart or about 5 ounces (check my math). Some farmers are actually (at least historically and certainly illegally) adding 1-3 ounces each time they spray fungicides. 5 ounces is probably going to have a minimal impact. Based or Dr. Prostko’s work 1 or 2 pints applied now, the results are quite devastating. He is showing a 53% reduction in yield with 24 ounces and 70% reduction with 32 ounces (of a 4 lb ai/gallon formulation).

Two weeks ago after the APRES meeting we were spraying a set of symptomology plots that I had hoped to show you and graduate students. We had some big grass coming in the cotton, soybean and peanut rows, so I decided we needed to spray Select to get the grasses so the symptoms of the other 17 herbicides would be easier to see. The problem is that the Cobra and Select jugs, both from Valent and both shaped the same, were sitting side by side. In my haste I added 120 mls of Cobra to the tank and not 120 mls of Select (12 ounces products per acre, along with crop oil.) You can imagine my surprise the next day when I stopped by and immediately realized what I had done. For about 10 seconds I thought the crop oil was surprisingly hot that morning, but then I put two and two together and commenced to “load a few hogs” as my dad would say. Some of you have been involved in loading hogs and we refer to swearing as loading hogs. I think I mostly called myself an idiot about 10 times in 3 minutes or less and then moved on to other things. The point is it is easy to make a mistake.

And, I have heard that “fishing lies” and the words one utters when “loading hogs” do not count against you on the big judgment day. Although I sure do hope that is the case, I think a few prominent deacons that both farmed and fished made that up and added that in their lessons. Those that deer hunt and fish for rock are in a totally different category of judgment.

Article first appeared as North Carolina Peanut Note (PNNC-2014-103)