Anti Coffee Berry Borer CBB: Application Guide for Microbial Formula for Maximum Yield

The coffee berry borer (Hypothenemus hampei, CBB) is a major pest that reduces the quality and quantity of coffee harvests, especially specialty coffee. CBB attacks not only reduce fruit weight but also trigger off-flavors that ruin the coffee profile. Therefore, an effective, environmentally friendly, and export-safe anti-CBB solution is needed. Biosolution presents an Anti-Coffee Berry Borer Formula based on Beauveria bassiana and Metarhizium anisopliae, two entomopathogenic fungi scientifically proven to control CBB without leaving chemical residues. This article will technically discuss the correct application method: dosage, timing, frequency, and adjuvant combinations so that farmers achieve optimal results.

Why CBB is a Serious Threat to Specialty Coffee

Female CBBs bore into coffee berries from the green to red stage, lay eggs inside the beans, and cause physical damage and microbial contamination. In specialty coffee, even low-level CBB attacks (1-2%) can reduce cupping scores by up to 10 points. Economic losses due to CBB in Indonesia are estimated at 20-40% per year. Conventional chemical control not only risks residue on the beans but also kills natural enemies and disrupts the garden ecosystem. Therefore, a biological approach using entomopathogenic fungi is the top choice for farmers targeting premium markets.

Composition of Biosolution's Anti-Coffee Berry Borer Formula

This product contains two superior fungal strains:

• Beauveria bassiana: This fungus infects CBB larvae and adults through contact. Spores penetrate the cuticle, develop in the hemolymph, and cause death within 3-7 days. B. bassiana also produces beauvericin toxin that inhibits insect growth.
• Metarhizium anisopliae: Works synergistically with B. bassiana, especially in high humidity conditions. M. anisopliae is more effective on eggs and early instar larvae. The combination increases efficacy to 80-90% in field applications.

Both fungi are formulated as a liquid concentrate with spore concentration ≥10⁸ CFU/ml, stable at storage temperatures of 25-30°C, and compatible with non-chemical adjuvants.

Correct Dosage and Application Method

Dosage: 3 ml per liter of water

Mix 3 ml of Anti-Coffee Berry Borer Formula into 1 liter of clean (non-chlorinated) water. For a 15-liter spray tank, use 45 ml of product. Stir until homogeneous. Ensure water pH is between 6-7 to keep spores viable. If water is too alkaline (pH >8), add a little lime juice or citric acid.

Application Time: Afternoon (4:00-6:00 PM)

Afternoon spraying provides advantages:

• Lower temperature (25-30°C) so spores do not die quickly from UV rays.
• Higher relative humidity (>70%) aids spore germination.
• Wind is usually calmer, reducing drift.

Frequency: Every 14 Days During Green-Red Fruit Stage

Start application when fruit enters the mature green stage (about 60-90 days after flowering), repeat every 14 days until harvest. A total of 3-5 applications per season depending on pest pressure.

Spraying Technique

• Use a fine spray nozzle (0.5-1 mm size) with pressure of 2-3 bar.
• Direct spray to all parts of the tree, especially fruit and lower branches where CBB hides.
• Wet fruit evenly but not dripping.
• Avoid spraying during rain or strong wind.

Adjuvant Combinations to Increase Effectiveness

Adjuvants play an important role in improving adhesion, spreading, and UV protection of spores. Here are recommended compatible adjuvants:

1. Non-ionic surfactant (e.g., Tween 80 0.1%): Reduces water surface tension so spray spreads more evenly on waxy fruit surfaces.
2. Plant-based sticker (e.g., pine resin 0.5%): Helps spores adhere to CBB cuticle.
3. UV protectant (e.g., aloe vera extract 1% or light mineral oil): Protects spores from sunlight degradation.

Note: Do not mix with chemical fungicides, bactericides, or copper-based pesticides as they can kill fungal spores. If simultaneous application with botanical insecticides (e.g., neem extract) is needed, conduct a compatibility test first.

Benefits of Applying Anti-Coffee Berry Borer Formula

• Maintains Specialty Coffee Grade: By suppressing CBB attack below 1%, coffee beans remain intact and defect-free, maintaining cupping scores >80.
• Residue-Safe for Export: This product leaves no chemical residue on beans, thus meeting strict EU, Japanese, and US standards.
• Environmentally Friendly: Does not kill non-target insects such as pollinating bees and natural predators.
• Harvest Remains Safe: Pre-harvest interval is only 14 days, farmers can harvest without long breaks.

Case Study: Field Effectiveness

Trials in West Java arabica coffee plantations showed that application of Anti-Coffee Berry Borer Formula at a dosage of 3 ml/L every 14 days suppressed CBB attack from 18% to 2.5% within 3 months. Harvest yield increased by 30% and beans passing specialty sorting rose by 45%. Farmers reported no side effects on plants or soil.

Conclusion

Controlling Hypothenemus hampei in specialty coffee requires a precise approach. Biosolution's Anti-Coffee Berry Borer Formula containing Beauveria bassiana and Metarhizium anisopliae provides an effective solution with a dosage of 3 ml/L, afternoon application every 14 days, and appropriate adjuvant combinations. By following this guide, farmers can protect coffee quality, increase market value, and meet export standards without residues. For maximum results, consult with Biosolution's technical team via WhatsApp for specific land recommendations.

Also read: Integrated Coffee Pest Control and Biosolution Products for Coffee