Planthoppers
Fulgoroidea
Sap-Sucking Insects Moderate Risk 3-12 mm
📖 Description
Planthoppers are a superfamily of sap-sucking insects belonging to the order Hemiptera, closely related to leafhoppers but distinguished by their uniquely shaped head and enlarged antennae. They feed by inserting their needle-like mouthparts into phloem tissue, extracting nutrients and excreting large quantities of honeydew. Some planthopper species are important agricultural pests and vectors of plant pathogens, including phytoplasmas that cause serious diseases in crops. Their jumping ability — they can launch themselves several times their body length — makes them difficult to catch and observe.
⚠️ Symptoms to watch for
- Yellowing and stippling on leaves from feeding
- Honeydew deposits with sooty mold growth
- Wilting and stunting of new growth
- White waxy filaments on stems and leaf undersides
- Hopperburn — brown leaf tips and margins
🩹 Treatment
- Spray with insecticidal soap to suffocate nymphs (organic)
- Apply neem oil to deter feeding and disrupt development (organic)
- Use carbaryl or permethrin sprays for heavy infestations (chemical)
- Apply systemic imidacloprid as a soil drench for persistent populations (chemical)
🌿 Organic treatments
- Spray with insecticidal soap to suffocate nymphs
- Apply neem oil to deter feeding and disrupt development
🧪 Chemical treatments
- Use carbaryl or permethrin sprays for heavy infestations
- Apply systemic imidacloprid as a soil drench for persistent populations
🛡️ Prevention
- Remove weeds and wild grasses near crops that serve as alternate hosts
- Encourage natural predators by planting nectar-rich flowers
- Use reflective mulches to deter landing adults
- Install fine mesh barriers on susceptible plants
🪴 Affected plants
- Grapes
- Raspberries
- Ornamental Shrubs
- Shade Trees
🦋 Natural predators
- Ladybugs
- Lacewings
- Parasitic Wasps
- Spiders
🌱 Host plants
- Vitis vinifera
- Rubus spp.
- Acer spp.
- Rosa spp.
🔄 Lifecycle
- Planthoppers typically undergo one to two generations per year, overwintering as eggs inserted into plant tissue or as nymphs in protected locations.
- Nymphs pass through five instars, often producing waxy filaments for protection.
- Winged adults disperse to new host plants, and some species produce both short-winged and long-winged forms depending on population density.
📅 Season
- Late Spring to Early Fall
🔎 Appearance
- Planthoppers are wedge-shaped insects that resemble small leaves or thorns, with broad, triangular wings held roof-like over the body when at rest.
- Many species have enlarged, frond-like antennae and a distinctive flattened head with prominent lateral carinae.
- Some tropical species produce copious white waxy filaments from their abdomen, giving them a cottony appearance.
- Nymphs often have feathery wax tails and are even more cryptic than adults.
💥 Damage level
- Moderate
🔁 Reproduction rate
- Fast
🗺️ Geographic regions
- North America
- Europe
- Asia
- Australia
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