Potato leafhopper causes upward curling of leaf tips and large areas of the leaves brown and dry out. A yellow band borders the brown areas. The light green, wedge shaped insect feeds on the undersides of leaves. Applications of Diazinon dust, methoxychlor, rotenone, or Sevin should control this insect.
Mites cause the leaves to be spotted and dried out. Sprays of rotenone control the problem.
Leaves are sometimes skeletonized by insects. No chemical control is listed.