Pepper spot
(Leptosphaerulina crassiaca)

Pepper spot occurs only on leaves and appears as dark-brown to black spots, usually less than 1/16-inch in diameter. The spots are usually well scattered over the leaflet. Numerous lesions of this type are necessary to cause noticeable leaf damage. Pepper spot is most common during the later part of the growing season. Leaf damage is generally negligible because the causal fungus is a weak parasite of peanuts.