Help: Grape leaves turning yellow?
This is my second year growing grapes and am hoping to get an actual harvest this year (3yr old vines). I live in NC and have a drip system on my grapes, so there isnt a bunch of water getting on the leaves/fruit. I also spray every 2 weeks with Sevin and this other anti-mold/fungus stuff.
Below are 2 links to the pictures of some grape leaves I have (one is the top and the other picture is the bottom). Can you help me identify whats wrong? Am I over/under watering, soil deficiency, or disease? I dont see any mold or fungi, but I honestly might not be able to recognize such things bc I am a newb. Or, is it just time for these leaves to die. Id say 5-10% of the leaves are turning this color.