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Potato
Leafhopper - Damage to Beans
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The potato leafhopper is a sucking insect, removing plant sap
directly from the vascular system in the leaflet, petioles and sometimes
the stem. In the feeding process the leafhopper injects a salivary
toxin that causes injury to the plant. Feeding injury sometimes
appears very similar to disease symptoms or nutrient imbalance.
By adversely affecting the vascular system, leafhoppers reduce photosynthesis,
decrease productivity, stunt the plant, and sometimes kill the young
seedlings.
The complex of symptoms produced by feeding of the potato leafhopper
adults and nymphs on potatoes and beans has been termed "hopperburn".
The first sign of hopperburn is whitening of the veins, which appears
within 2 days of feeding. These areas soon become flaccid and yellow
in color, after which they desiccate, turn brown and die. Leaf curling
generally accompanies the necrotic symptoms resulting from leafhopper
feeding. Other symptoms of feeding injury on beans include stunting,
decrease in internodal growth and dropping of flowers and pods.
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How to manage potato leafhopper on beans
Return to potato leafhopper life cycle
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Some information on this page
taken from Insects of Vegetables: Cornell Cooperative Extension factsheet
number 102GFS760.20 authored by W. M. Tingey, and A. A. Muka.
©All material is protected
by Section 107 of the 1976 copyright law.
Copyright is held by Cornell University.
Maintained by Jason D. Plate. Last updated Mar. 8th, 2007.
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