Coffee Berry Borer
Hypothenemus hampei
📖 Description
Coffee Berry Borer is the most destructive pest of coffee worldwide and a major constraint to Indian coffee production, particularly in Arabica belts of Karnataka (Chikmagalur, Coorg, Hassan), Kerala (Wayanad, Palakkad) and Tamil Nadu (Nilgiris). The female beetle bores into the berry through the apex and lays eggs inside the bean — the entire larval and pupal development occurs inside the berry, making control extremely difficult. Beyond direct yield loss, the pest facilitates entry of ochratoxin-producing fungi that contaminate beans and pose food safety risks. The pest is most severe in low-altitude (<1000 m) shaded plantations with continuous berry presence. IPM with broca-picking (manual collection and destruction of infested berries), biological control with Cephalonomia stephanoderis (a parasitic wasp that attacks the beetle inside the berry) and Beauveria bassiana (a fungal pathogen) provides effective and environmentally sustainable control. Strip-picking at end of harvest to remove all berries is critical — this eliminates breeding sites between seasons and is the single most important preventive measure.
⚠️ Symptoms to watch for
- Pinhole entry on berry apex, tunnelling inside bean, damaged beans with frass and fungal growth, premature berry drop, 'light' berries at harvest, reduced bean weight and quality, ochratoxin contamination from associated fungi, yield loss 30-80% in untreated plantations
🩹 Treatment
- Pick and destroy infested berries (broca-picking), release Cephalonomia stephanoderis @ 5000/ha (parasitoid), spray Beauveria bassiana @ 5 g/L during dry months, apply need-based insecticide at post-bloom stage
🌿 Organic treatments
- Pick and destroy all infested berries (broca-picking) at 15-day intervals, release Cephalonomia stephanoderis @ 5000-10000/ha, spray Beauveria bassiana @ 5 g/L (effective in humid conditions), apply neem oil 5 ml/L, install broca traps (alcohol-baited) @ 4/ha, harvest cleanly to remove all berries
🧪 Chemical treatments
- Endosulfan 35 EC @ 2 ml/L (banned in most regions — avoid), Chlorpyriphos 20 EC @ 2 ml/L (only post-harvest), Carbaryl 50 WP @ 4 g/L (limited use), Cypermethrin 10 EC @ 0.5 ml/L (post-bloom only). NOTE: Most coffee-growing regions now restrict chemical use due to residue concerns — biocontrol is preferred.
🛡️ Prevention
- Harvest all berries cleanly ('strip-picking') to remove breeding sites, process berries promptly to prevent larval development, maintain 1.5-2 m spacing between plants, prune to improve aeration, plant resistant varieties (Sln. 795, Cauvery), quarantine new plantings, destroy fallen and dried berries
🪴 Affected plants
- Coffee (Arabica, Robusta, Liberica), Excelsa Coffee, Wild Coffee Species
🦋 Natural predators
- Cephalonomia stephanoderis (parasitic wasp), Prorops nasuta, Beauveria bassiana (fungal pathogen), Metarhizium anisopliae, Ants
🌱 Host plants
- Coffea arabica, Coffea canephora (Robusta), Coffea liberica, Coffea excelsa
🔄 Lifecycle
- Female lays 30-80 eggs inside the berry.
- Eggs hatch in 5-9 days.
- Larvae feed for 10-20 days through 3 instars.
- Pupation inside the berry, lasting 5-10 days.
- Adult female lifespan 30-60 days inside the berry; male never leaves.
- Total life cycle 25-40 days; 4-6 generations per year, overlapping.
📅 Season
- Year-round, peaks during berry maturation (Oct-Mar in main coffee season)
🔎 Appearance
- Adult female is a tiny, dark brown to black cylindrical beetle with a glossy, shield-like pronotum covering the head.
- Males are smaller, wingless and never leave the berry.
- Larvae are white, legless grubs with brown head capsule, developing entirely inside the coffee berry.
💥 Damage level
- Severe
🔁 Reproduction rate
- Rapid
🗺️ Geographic regions
- Indian Subcontinent
- Cosmopolitan in Coffee-Growing Tropics Worldwide
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