Many eggplant varieties have small prickly thorns on the stem and calyx, so exercise caution or wear gloves when harvesting. When the fruits become dull or brown, they are too mature for culinary use and should be cut off and discarded. Overmature fruits are spongy and seedy and may be bitter. Even properly harvested fruits do not store well and should be eaten soon after they are harvested. Large, vigorous plants can yield as many as four to six fruits at the peak of the season.
Flea beetles cause tiny holes in the leaves.
Damage can be severe, especially on young plants, if unchecked. These beetles can be controlled by applying an insecticide. They probably were planted while the soil was too cold. If necessary, repot into larger containers to maintain vigor. Mulching with black plastic film can help warm the soil,, especially in northern areas.