My sweet potatoes are developing this greyness to some of the leaves. Should...
It looks like that portion of the plant (the scattered leaves) may have been under some type of stress which may have affected the base of the leaves or the stem. Sweet potato usually has quite a bit of foliage on the plant. It would be okay to remove the leaves. No chemical control is necessary. Monitor the growth of the plant throughout the season. If you notice additional symptoms you can send us photos. See our Vegetable profile for cultural information http://extension.umd.edu/learn/vegetable-profiles-sweet-potato