Colorado Potato Beetle control with foliar insecticides varies from field to field and county to county as a result of the development of resistance to most insecticides. Hence, it is very important to monitor for resistance and rotate potato fields as well as insecticides to minimize the development of insecticide resis-tance. May. Insecticide resistance can be determined by hatching egg masses and testing with various chemicals. See your county Cooperative Extension center for more information. Leafhoppers are often a serious problem in western North Carolina.
Mature foliage turns yellow before margins become brown.
For proper diagnosis and identification of insect problems, contact your County Extension center. They have the latest information on methods, chemicals, and time of application for the control of these and other insects. If a disease problem develops in a field, make sure that the problem is properly identified before control measures are initiated. The local County Extension Agent, or a consul- tant, may be of assistance in diagnosing a problem. There are several practices that a grower can utilize to manage diseases and they should utilize all practices, such as rotation, field selection, resistant varieties, time of planting, time of harvest, proper storage conditions, etc.