By David Moseley, Hendrix, James, Price, III, Paul P, Padgett, Guy B., Kerns, Shelly, Stephenson, Daniel O., Miller, Donnie K., Villegas, James M., Parvej, Md Rasel
LSU AgCenter
As the cotton season progresses in Louisiana, there have been several reports of potassium deficiency. Potassium deficiency can weaken the plant, making it easier for plant pathogens to attack. It is very common to see fungal leaf spots on potassium stressed plants. Although pre-mature defoliation due to disease is possible, it is most likely the nutrient deficiency that is the leaf-dropping culprit.