Leafhoppers, about
Insect
Potato leafhopper (PLH) can be differentiated from white apple leafhopper by color and by observing movement and feeding habits. PLH are more active on the leaf and can move side-ways. WALH does not move sideways. PLH nymphs run quickly to the other side of the leaf as the leaf is examined. PLH also prefer young leaves and feed near leaf edges, causing the leaf to curl downward. WALH prefer mature leaves and do not tend to feed at the leaf edge. WALH cause a whitish stippling effect on leaves and they drop a hard to remove excrement on fruit, mostly in the second generation. There are two generations of WALH, three to four of PLH. Both are present from spring through harvest.
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