Pink Hibiscus Mealybug
Maconellicoccus hirsutus
Sap-Sucking Insects High Risk 2-4 mm
📖 Description
Pink Hibiscus Mealybug (PHM), native to South Asia, is a highly polyphagous pest attacking over 300 plant species. It has spread to Africa, the Americas, and the Pacific, becoming invasive in many regions. The pest injects toxic saliva while feeding, causing characteristic crinkling, twisting, and stunting of new growth even at low populations. Heavy infestations can kill young plants and severely reduce yields of cotton, okra, and hibiscus. Classical biological control with the predator Cryptolaemus montrouzieri has been highly successful across India.
⚠️ Symptoms to watch for
- Crinkled
- twisted
- and stunted new growth
- bunchy tops on terminals
- white cottony masses on shoots and leaf axils
- distorted leaves and flowers
- sooty mold on honeydew
- dieback of branches
🩹 Treatment
- Release Cryptolaemus montrouzieri beetles @ 10 per plant
- spray neem oil 5ml/L with sticker
- apply insecticidal soap
- prune and destroy infested shoots
- use systemic insecticides when infestation is heavy
🌿 Organic treatments
- Release Cryptolaemus montrouzieri (mealybug destroyer) @ 10/plant
- spray neem oil 5ml/L + sticker
- apply Lecanicillium lecanii @ 5g/L
- prune and burn infested shoots
- spray 5% NSKE (neem seed kernel extract)
🧪 Chemical treatments
- Imidacloprid 17.8 SL @ 0.5 ml/L as foliar or soil drench
- Buprofezin 25 SC @ 2 ml/L
- Dimethoate 30 EC @ 1.5 ml/L
- Acephate 75 SP @ 1 g/L
🛡️ Prevention
- Inspect new plants before planting
- prune infested shoots regularly
- avoid excessive nitrogen
- conserve ladybird beetles and lacewings
- avoid broad-spectrum insecticides that kill natural enemies
- remove alternate weed hosts like Sida and Abutilon
🪴 Affected plants
- Hibiscus
- Cotton
- Okra
- Mesta
- Sunflower
- Pulses
- Grapevine
- Custard Apple
- Many Ornamentals and Weeds (over 300 host plants)
🦋 Natural predators
- Cryptolaemus montrouzieri
- Scymnus coccivora
- Green Lacewings
- Spiders
- Anthocorid Bugs
🌱 Host plants
- Hibiscus rosa-sinensis
- Gossypium hirsutum
- Abelmoschus esculentus
- Moringa oleifera
- Vitis vinifera
🔄 Lifecycle
- Female lays 300-600 eggs in a cottony ovisac over 5-10 days.
- Eggs hatch in 6-14 days.
- Nymphs (crawlers) disperse and settle on tender plant parts, passing through 3 female or 4 male instars over 2-3 weeks.
- Adult females live 1-2 months; males are short-lived.
- Total life cycle 30-40 days; 10-12 overlapping generations per year in tropical conditions.
📅 Season
- Year-round, peak Mar-Jun and Sep-Nov during warm humid weather
🔎 Appearance
- Soft-bodied, oval, pinkish insects covered in white mealy wax with two pairs of dark markings on the back.
- Females are wingless; males are tiny with one pair of wings and two long white wax tail filaments.
- Egg masses are laid in cottony ovisacs.
💥 Damage level
- High
🔁 Reproduction rate
- Rapid
🗺️ Geographic regions
- Indian Subcontinent
- Southeast Asia
- Africa
- Caribbean
- Pacific Islands
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