Leafhoppers: Identification, Damage & Control Guide

A practical guide to recognizing leafhoppers and their nymphs, diagnosing stippling and hopper burn, understanding disease-vector risk, and choosing low-impact control when treatment is actually justified.

Feature	Quick answer
Family	Cicadellidae
Typical size	Often about 1/8-1/4 inch; some sharpshooters are larger
Shape	Small, narrow and wedge-shaped
Common colors	Green, yellow, gray, brown or patterned
Movement	Adults jump; nymphs often move sideways or backward
Main damage	Stippling, yellowing, curling and reduced vigor
Serious symptom	Hopper burn in susceptible plants/species
Disease risk	Some species vector bacteria, viruses or phytoplasmas
First action	Inspect leaf undersides and confirm the pest
Best approach	IPM: monitor, conserve natural enemies, treat only when needed

What Are Leafhoppers?

Leafhoppers are true bugs that feed by inserting piercing-sucking mouthparts into plant tissues. More than 380 species occur in California alone, and globally the family includes thousands of species with very different host ranges and pest importance. Some feed on only a few related plants, while others move among many crops, weeds, ornamentals and woody plants.

That diversity matters because “leafhopper” describes a large insect family rather than one pest with one behavior. A leafhopper found on rosemary may not be the same species causing damage in potatoes, grapes or beans, and not every species is an important disease vector.

What Do Leafhoppers Look Like?

Shape and movement are generally more useful than color for identification. Common field clues include:

• Small, elongated, wedge-shaped body that is longer than it is wide.
• Commonly less than 1/4 inch long, although sharpshooters and a few other forms are larger.
• Green, yellow, gray, brown or mottled coloration; some species are strikingly patterned.
• One or more long rows of small spines along the hind legs.
• Fast jumping by adults when disturbed.
• Wingless nymphs that often run rapidly sideways, forward or backward on leaves.
• Adults, nymphs and pale cast skins frequently found on leaf undersides or green shoots.

Leafhopper Nymph vs. Adult

Trait	Nymph	Adult
Wings	No functional wings	Fully winged
Body shape	Similar wedge shape, smaller	Wedge-shaped and more developed
Movement	Often runs sideways/backward	Jumps and flies readily
Location	Common on leaf undersides	Leaves, shoots and surrounding vegetation
Control relevance	Often easier to target with contact sprays	Highly mobile and prone to reinvasion

Leafhopper vs. Planthopper

Leafhoppers and planthoppers can look similar at a glance, but several structural clues help separate them.

Trait	Leafhopper	Planthopper
Overall body	Usually narrow and wedge-shaped	Often broader with flatter sides
Antennae	Usually between or in front of the eyes	Often below the eyes on the side of the head
Hind legs	Long rows of small spines	Several larger spines are common
Head shape	Usually without a pronounced snout	Some have a ridge, keel or snoutlike projection
Nymph residue	Cast skins common	Some species produce waxy filaments

Identification tip:  If the insect vanishes as soon as the leaf is touched, photograph it before disturbing the plant. A close image of the side profile and hind legs can be more useful than color alone.

Leafhopper Life Cycle

Leafhoppers undergo incomplete metamorphosis: there is no pupal stage.

Stage	What happens
Egg	Females often insert eggs into tender plant tissue rather than leaving exposed egg masses.
Nymph	Wingless nymphs hatch and pass through several progressively larger instars.
Adult	Winged adults feed, disperse, mate and lay new eggs. Many species have multiple generations per year.

Warm conditions can accelerate development in some species, which helps explain why populations can build quickly once a suitable crop or garden host is available.

What Plants Do Leafhoppers Attack?

Host range varies widely by species. Plants commonly associated with leafhoppers include:

Plant group	Examples	Typical concern
Vegetables	Potato, tomato, beans, peas, carrots, peppers, eggplant	Stippling, hopper burn, yield reduction in severe cases
Herbs	Mint, rosemary, sage and other Lamiaceae	Pale stippling and cosmetic injury
Field crops	Alfalfa/lucerne, maize, cotton, peanuts	Crop-specific feeding injury and, for some species, disease transmission
Fruit crops	Grapes and some orchard crops	Stippling; certain sharpshooters vector pathogens
Ornamentals	Flowers, shrubs, woody plants	Usually cosmetic unless populations are high
Turf	Many grasses	Leaf bleaching; serious damage is uncommon

What Does Leafhopper Damage Look Like?

Leafhopper injury is usually caused by feeding rather than chewing. Look for a combination of plant symptoms and actual insects.

• Pale or bleached specks (stippling) scattered across leaves.
• Yellowing that can spread from localized spots to larger leaf areas.
• Curling, browning or dying leaf tips under heavier feeding.
• Reduced plant vigor, especially on young or stressed plants.
• Honeydew and blackish sooty mold with species that excrete sugary waste.
• Pale cast skins left behind as nymphs molt.
• Fast-moving nymphs or adults on leaf undersides when the plant is inspected.

What Is Hopper Burn?

Hopper burn is a characteristic form of injury associated with certain leafhoppers, especially some Empoasca species. Affected leaves may develop yellowing near the edges or tips, followed by browning, necrosis, curling and reduced growth. The injury reflects feeding effects that can include salivary toxins and disruption of vascular function, rather than simple removal of leaf tissue.

Hopper burn is important diagnostically because it can resemble nutrient deficiency, drought stress or disease. Finding adult and immature leafhoppers on the undersides of symptomatic leaves makes the diagnosis much stronger.

Leafhopper Damage vs. Similar Plant Problems

Problem	What can look similar	Useful clue
Leafhoppers	Pale stippling, yellowing, curling	Wedge-shaped insects or nymphs on leaf undersides; adults jump
Spider mites	Stippling and bronzing	Very small mites; fine webbing may be present
Thrips	Silvery/pale scarring	Slender insects and surface scarring rather than classic hopping insects
Lace bugs	Stippling	Dark fecal spotting and lace-like adults on leaf undersides
Nutrient deficiency	Yellowing or patterned chlorosis	No leafhopper nymphs/adults; pattern often follows nutrient physiology
Plant disease	Yellowing, distortion, decline	Symptoms may be systemic; confirm vector presence or laboratory/local diagnosis when important

Do not diagnose from stippling alone:  UC IPM notes that lace bugs, plant bugs, spider mites and thrips can produce similar pale spotting. Turn the leaf over and look for the arthropod causing the injury.

Do Leafhoppers Spread Plant Diseases?

Some do, but not all. Certain leafhopper and sharpshooter species can vector bacteria, viruses or phytoplasmas between plants. One well-known example is Xylella fastidiosa, which can be carried by sharpshooters and cause diseases such as Pierce’s disease of grape and several leaf-scorch diseases.

The disease risk is species-, crop- and region-specific. It is therefore inaccurate to treat every leafhopper sighting as a disease emergency.

Important limitation:  Killing leafhoppers after they land does not always prevent disease transmission. Some vectors can transmit a pathogen before an insecticide kills them, so disease management may require host, vector and landscape strategies beyond spraying.

How to Check Plants for Leafhoppers

1. Inspect the underside of leaves, especially on new growth and leaves showing stippling.
2. Look for wingless nymphs, pale cast skins and adult insects.
3. Gently tap or disturb foliage and watch for small insects jumping away.
4. Compare symptomatic leaves with healthy leaves from the same plant.
5. Check nearby weeds and alternate host plants that may be harboring leafhoppers.
6. Recheck several days later because populations are mobile and may change quickly.

When Should You Control Leafhoppers?

Presence alone is not a treatment threshold. In many gardens and landscapes, leafhoppers are a nuisance or curiosity and do not threaten plant survival.

Control becomes more reasonable when one or more of the following apply:

• Leafhopper numbers are increasing and obvious injury is expanding.
• Young plants are being stunted or heavily damaged.
• A crop is known to be sensitive to hopper burn.
• A locally important leafhopper-vectored disease creates a meaningful risk.
• Crop-specific monitoring or Extension guidance indicates treatment is justified.

There is no universal “number of leafhoppers per plant” that applies to every crop. Thresholds differ, and for some crops measurable thresholds are not established.

How to Control Leafhoppers Naturally

1. Conserve Natural Enemies

Leafhoppers have many predators and parasitoids. Assassin bugs, damsel bugs, lacewings, lady beetles, minute pirate bugs and spiders can all contribute to suppression. Tiny parasitoid wasps such as Anagrus species attack the eggs of some leafhoppers.

Avoid routine broad-spectrum spraying when damage is minor, because killing these natural enemies can disrupt the garden’s biological control system.

2. Manage Weeds and Alternate Hosts

Leafhoppers that feed on many plants can build up on weeds or other alternate hosts and later migrate into vegetables, herbs or ornamentals. Removing problem weeds and managing heavily infested alternate hosts can reduce this movement.

3. Use Row Covers or Netting Where Practical

For small vegetable plantings, fine netting or floating row covers can help exclude incoming adults if installed before infestations build. Remove or manage covers as needed for pollination and crop growth.

4. Monitor With Sticky Traps

Yellow sticky traps can help reveal adult activity and population trends, but they are better used as a monitoring tool than as a stand-alone solution for heavy infestations.

Can Insecticidal Soap, Horticultural Oil or Neem Help?

They can provide some control of early-season nymphs when the product is labeled for the plant and pest and coverage is thorough. Nymphs are generally easier to contact than highly mobile adults.

• Spray the undersides of leaves and green shoots where nymphs are feeding.
• Follow the label for concentration, plant sensitivity, temperature restrictions and repeat applications.
• Avoid unnecessary treatment of open flowers and pollinator activity zones.
• Do not assume “natural” means harmless to every beneficial organism.

When Insecticides May Be Needed

If leafhopper injury is severe, crop value is high or local disease-vector pressure makes control important, a labeled insecticide may be justified. Choose the least disruptive effective option available for the crop and pest, and follow the current product label.

Broad-spectrum products can kill predators and parasitoids, and adults may quickly reinvade from untreated vegetation. For this reason, pesticide use should be part of a larger monitoring and habitat-management plan rather than the only strategy.

Why Spraying Does Not Always Solve Leafhopper Problems

Reason	What happens
Adults are highly mobile	They can fly or jump back into treated plants from nearby hosts.
Natural enemies are removed	Broad-spectrum sprays may kill predators and parasitoids that were suppressing leafhoppers or other pests.
Nymphs remain hidden	Poor coverage of leaf undersides can miss the stage most susceptible to contact treatments.
Disease transmission can occur quickly	A vector may infect a plant before dying from insecticide exposure.
Alternate hosts remain nearby	Untreated weeds and surrounding vegetation can serve as a continuing source of migrants.

Common Leafhopper Control Mistakes

Mistake	Why it matters	Better approach
Treating every stippled leaf	Several pests cause stippling	Inspect leaf undersides and confirm the insect
Spraying at first sight	Low numbers often cause little damage	Monitor injury and population trend
Ignoring weeds	Alternate hosts remain available	Manage important weed hosts
Killing beneficial insects	May worsen pest balance	Use IPM and selective options
Treating adults only	Nymphs may remain on leaf undersides	Inspect and target all relevant stages
Assuming all leafhoppers spread disease	Vector risk is species-specific	Use local crop/disease guidance
Expecting insecticide to prevent every disease case	Transmission may happen before the insect dies	Use integrated disease and vector management
Ignoring reinvasion	Adults move readily between plants	Continue monitoring after treatment

Frequently Asked Questions

What is a leafhopper?

A leafhopper is a small sap-feeding insect in the family Cicadellidae. Most are wedge-shaped, jump readily and feed on leaves or green shoots.

How big are leafhoppers?

Many common garden species are roughly 1/8 to 1/4 inch long, although some sharpshooters are larger.

What do leafhoppers eat?

They feed on plant fluids using piercing-sucking mouthparts. Host plants vary greatly by species.

What does leafhopper damage look like?

Common symptoms include pale stippling, yellowing, curling and browning. Some species can cause hopper burn.

What is hopper burn?

Hopper burn is yellowing, browning and necrosis caused by feeding injury from certain leafhoppers, often affecting leaf margins and tips.

Do leafhoppers kill plants?

Most garden infestations do not kill healthy established plants, but high populations, sensitive crops or disease-vector species can cause serious problems.