Problem Identifier Unit Screen//v.w/ RR Template

Problem Identifier Unit Screen//v.w/ RR Template Hopperburn

Problem
Leaves are stippled. Some are scorched, with a green midrib and brown edges curled under. Spotted, pale green, winged insects up to 1/8 inch long hop, run, or fly away quickly when the plant is touched.

Analysis
Hopperburn is caused by the potato leafhopper (Empoasca fabae), which injects a toxin into the leaves as it feeds. Bean yields may be drastically reduced from hopperburn. Leafhoppers are active throughout the growing season. They hatch in the spring from eggs laid on perennial weeds and ornamental plants. Even areas that have winters so cold that the eggs cannot survive are not free from infestation, because leafhoppers migrate in the spring from warmer regions.

Solution
Treat infested plants with an insecticide containing malathion, diazinon, or pyrethrins, or an insecticidal soap at the first sign of damage. Be sure to cover the lower surfaces of the leaves, where the leafhoppers feed. Repeat the spray as often as necessary to keep the insects under control. Allow at least 10 days between applications.

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