Sugarcane Woolly Aphid
Ceratovacuna lanigera
📖 Description
Sugarcane Woolly Aphid (SWA) is a major pest of sugarcane across the Indian subcontinent, causing 30-50% yield loss and reduced sugar recovery. First reported in India in 1958, it emerged as a major outbreak pest in Maharashtra, Karnataka, and Uttar Pradesh during the 2000s. Dense colonies of aphids covered in white waxy wool feed on the underside of leaves, sucking phloem sap and excreting copious honeydew that promotes sooty mold growth, blocking photosynthesis. Classical biological control with the indigenous predatory caterpillar Dipha aphidivora and the brown lacewing Micromus igorotus has been remarkably successful in sugarcane ecosystems across India, reducing dependence on insecticides.
⚠️ Symptoms to watch for
- White woolly patches on underside of leaves
- yellowing and drying of leaves
- sooty mold growth on honeydew
- stunted plants
- reduced juice quality and sugar recovery
- yield loss 30-50%
🩹 Treatment
- Release Dipha aphidivora @ 1000/ha
- apply neem oil 5ml/L with sticker
- spray insecticidal soap
- use recommended insecticides when natural enemies fail
- remove infested leaves
🌿 Organic treatments
- Release Dipha aphidivora (predatory caterpillar) @ 1000/ha
- release Micromus igorotus (brown lacewing) @ 500/ha
- apply neem oil 5 ml/L with sticker
- spray Lecanicillium lecanii @ 5 g/L
- remove and destroy infested leaves
- conserve indigenous predators
🧪 Chemical treatments
- Imidacloprid 17.8 SL @ 0.5 ml/L
- Dimethoate 30 EC @ 1.5 ml/L
- Acephate 75 SP @ 1 g/L
- Thiamethoxam 25 WG @ 0.4 g/L (avoid during natural enemy release)
🛡️ Prevention
- Plant resistant varieties (Co 86032, Co 94012)
- use healthy seed material
- inspect nurseries regularly
- conserve natural enemies by avoiding broad-spectrum insecticides
- remove infested leaves early
- practice crop rotation
- avoid ratooning in heavily infested fields
🪴 Affected plants
- Sugarcane
- Wild Sugarcane
- Some Grasses (Poaceae)
🦋 Natural predators
- Dipha aphidivora
- Micromus igorotus
- Syrphid Fly Larvae
- Ladybird Beetles
- Spiders
🌱 Host plants
- Saccharum officinarum
- Saccharum spontaneum
- Erianthus spp.
🔄 Lifecycle
- Reproduces primarily by parthenogenesis, with females giving birth to 30-80 live nymphs.
- Nymphs mature in 10-15 days and begin reproducing.
- Winged forms appear in crowded conditions.
- Adults live 20-30 days.
- Total life cycle 15-25 days; 15-20 overlapping generations per year in tropical conditions.
📅 Season
- Year-round in tropical sugarcane, peaks Aug-Nov during monsoon-post-monsoon period
🔎 Appearance
- Small, pale-yellowish aphids covered with white waxy wool-like filaments.
- They form dense colonies on the underside of sugarcane leaves, giving infested leaves a fluffy white appearance.
- Winged forms appear when colonies become crowded.
💥 Damage level
- High
🔁 Reproduction rate
- Rapid
🗺️ Geographic regions
- Indian Subcontinent
- Southeast Asia
- East Asia
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