WSU Extension

Hortsense

Apple
 
Disease
Anthracnose and Bull's-eye rot 
Bitter pit 
Burrknot 
Crown and collar rot 
Crown gall 
Cytospora canker 
Fire blight 
Fruit russeting 
Nectria canker (European canker) 
Nectria twig blight (Coral spot) 
Perennial canker (Bull's-eye rot) 
Phytophthora fruit rot 
Powdery mildew 
Scab 
Virus diseases 
Insect
Aphids 
Apple ermine moth 
Apple maggot 
Apple-and-thorn skeletonizer 
Brown marmorated stink bug 
Codling moth 
Cutworms and armyworms 
Earwigs 
Fruittree leafroller 
Leafhoppers 
Leafrollers 
Lecanium scale 
San Jose scale 
Spider mites 
Tent caterpillars 
Tentiform leafminer 



print version| pdf version| email url    
Caption: Leafhoppers and damage on apple
Photo by: E.H. Beers
  
Apple : Leafhoppers
(revision date: 7/13/2015)


Biology
Leafhoppers are typically found on the underside of leaves. Immature leafhoppers (nymphs) are usually less than 1/10" long and white to greenish or yellowish in color. Adults are white and about 1/8" long. Leafhoppers somewhat resemble aphids but are larger and more active. They feed by sucking plant juices, often causing damaged leaves to develop a white to yellow speckling or mottling. Severely damaged leaves may turn brown and shoots may curl and die back. Feeding leafhoppers produce honeydew, a sweet, sticky material which may attract ants or become covered with a dark growth of sooty mold. Honeydew may be present on leaves and fruit. Leafhoppers rarely cause serious damage to plants, although very heavy infestations may result in premature leaf drop and small fruit.
Management Options

Non-Chemical Management
  • Several insects feed on leafhoppers including damsel bugs, assassin bugs, and parasitic wasps. Avoid use of broad-spectrum insecticides which kill beneficials.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

+ Show larger images

 
Caption: Leafhoppers and damage on apple
Photo by: E.H. Beers
Caption: Leafhopper
Photo by: E.H. Beers
Caption: White apple leafhopper damage to apple leaves
Photo by: M. Bush
Caption: White apple leafhopper adult, nymph and tar spots on apple leaf
Photo by: M. Bush