There are many things that can cause the leaves to turn yellow, with no way of knowing exactly what is going on with your
plant I will name a few.
1. It could be chlorotic, simply give it a shot of fertilizer to help.
2.Heat stress.
3.Too much water
4. Root rot (usually associated with too much water)
5. A little critter called a cut worm, it eats away at the base of the
plant girdling it.
6. Round Up or other chemical damage. (Believe it or not I do see this at least once a week in the field)
7. Mulching to heavily at the base of the
plant. This will allow moisture to start to rot away the stem of the
plant.
Hope these help.
Mike
