Potato Psyllid
Bactericera cockerelli
Fungal & Bacterial Vectors High Risk 2-3 mm
📖 Description
The potato psyllid is a devastating pest that vectors Candidatus Liberibacter solanacearum, the pathogen responsible for zebra chip disease in potatoes. Infected tubers develop dark stripes when fried, rendering them commercially worthless. This tiny insect has caused hundreds of millions of dollars in losses to the potato industry in North America and New Zealand. Its ability to transmit the bacterial pathogen makes it far more dangerous than its small size suggests.
⚠️ Symptoms to watch for
- Zebra chip disease causing dark stripes in potato tubers,Psyllid yellows — yellowing and purpling of leaves,Stunted growth and shortened internodes,Excessive tuber sprouting and chain tubers,Upward curling of leaf margins
🩹 Treatment
- Apply sulfur dust to repel psyllids (organic),Release beneficial insects like lacewings (organic),Spray with pyrethrin-based insecticide (chemical),Apply systemic insecticide containing thiamethoxam (chemical)
🌿 Organic treatments
- Apply sulfur dust to repel psyllids,Release beneficial insects like lacewings
🧪 Chemical treatments
- Spray with pyrethrin-based insecticide,Apply systemic insecticide containing thiamethoxam
🛡️ Prevention
- Use certified disease-free seed potatoes,Monitor with yellow sticky traps,Remove solanaceous weeds near crops,Use reflective mulch to deter landing
🪴 Affected plants
- Potatoes,Tomatoes,Peppers,Eggplant,Tamarillo
🦋 Natural predators
- Green Lacewings,Minute Pirate Bugs,Predatory Bugs
🌱 Host plants
- Solanum tuberosum,Solanum lycopersicum,Capsicum annuum,Solanum melongena
🔄 Lifecycle
- Females lay orange-yellow eggs on leaf margins and undersides.
- Eggs hatch in 3-7 days.
- Nymphs pass through 5 instars over 12-18 days.
- Adults can live 20-60 days and females lay 200-500 eggs.
- Multiple generations occur per year, with 4-7 generations common in warm regions.
📅 Season
- Year-round in warm areas, Spring-Fall in temperate zones
🔎 Appearance
- Tiny, cicada-like insect with transparent wings and dark bands on the abdomen.
- Nymphs are flat, yellowish-green with fringed edges and red eyes.
- Adults jump when disturbed.
💥 Damage level
- High
🔁 Reproduction rate
- Fast
🗺️ Geographic regions
- North America
- Central America
- New Zealand
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