Taller alfalfa will tolerate greater numbers. The potato leafhopper is wedge shaped and pale green in color. Adults are very active, jumping or flying when disturbed. Both adults and nymphs will run backwards or sideways rapidly. Damage by leafhoppers is referred to as hopper-burn.
Foliage becomes dwarfed, crinkled, and curled.
Small triangular brown areas appear at the tips of leaves, gradually spreading around the entire leaf margin. Suggested treatment guidelines are presented below. Thresholds are based on the number of leafhoppers per sweep when swinging a sweep net in a pendulum-like motion through the tops of the plants. A total of 11.2 fl. Per acre may be applied per season.