Red Cotton Bug
Dysdercus cingulatus
📖 Description
Red Cotton Bug (also called Red Cotton Stainer) is a major pest of cotton across the Indian subcontinent. Both adults and nymphs pierce green and mature bolls, sucking sap from seeds and lint. The feeding causes characteristic yellow to red staining of cotton lint (hence ‘stainer’), reduces seed weight and oil content, and transmits Nematospora fungi that cause internal boll rot. Heavily infested bolls open prematurely, exposing lint to weather damage and reducing fiber quality. The pest breeds continuously on wild Malvaceous plants, migrating to cotton fields when bolls form. Late-maturing cotton varieties and fields surrounded by wild hosts suffer the most damage.
⚠️ Symptoms to watch for
- Discolored and stained cotton lint
- yellow and shriveled seeds
- premature opening of green bolls
- reduced oil content
- transmission of staining and rotting fungi (Nematospora) inside bolls
🩹 Treatment
- Handpick and destroy nymphs and adults
- apply neem oil 5ml/L
- use recommended insecticides at boll formation
- destroy alternate host plants around fields
- harvest promptly at maturity
🌿 Organic treatments
- Handpick nymphs and adults on young plants
- spray neem oil 5ml/L with sticker
- apply Beauveria bassiana @ 5g/L
- destroy wild Malvaceae around fields
- set up light traps @ 1/ha
🧪 Chemical treatments
- Lambda-cyhalothrin 5 EC @ 1 ml/L
- Acephate 75 SP @ 1 g/L
- Indoxacarb 14.5 SC @ 1 ml/L
- Bifenthrin 10 EC @ 1 ml/L
🛡️ Prevention
- Synchronize cotton planting in the region
- destroy wild Malvaceous hosts (Thespesia, Sida, Abutilon)
- harvest cotton promptly at maturity to avoid late-season infestation
- deep plough after harvest to expose eggs
- conserve predatory bugs and spiders
🪴 Affected plants
- Cotton
- Okra
- Hibiscus
- Silk Cotton Tree
- Hollyhock
- Sida
🦋 Natural predators
- Spiders
- Reduviid Bugs
- Praying Mantis
- Birds
- Lacewings
🌱 Host plants
- Gossypium spp.
- Abelmoschus esculentus
- Bombax ceiba
- Sida spp.
- Abutilon spp.
🔄 Lifecycle
- Female lays 200-400 eggs in soil crevices or plant debris.
- Eggs hatch in 6-10 days.
- Nymphs pass through 5 instars over 30-50 days.
- Adults live 1-3 months.
- Total life cycle 40-60 days; 4-6 generations per year.
📅 Season
- Active Aug-Dec on cotton, breeds on wild hosts year-round
🔎 Appearance
- Reddish-orange bugs with a white collar-like band across the pronotum and a series of dark spots on the forewings.
- Nymphs are bright red with dark wing pads in later instars.
- They emit a strong smell when disturbed.
💥 Damage level
- High
🔁 Reproduction rate
- Fast
🗺️ Geographic regions
- Indian Subcontinent
- Southeast Asia
- Africa
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