Tea plantations are attacked by a wide range of insect pests throughout the year. If not managed properly, these pests reduce leaf quality, lower yield, weaken tea bushes, and increase production costs. Excessive use of chemical insecticides can also lead to pesticide resistance, residue problems, destruction of beneficial insects, and poor soil health.

Biopesticides offer an environmentally friendly and sustainable alternative for managing tea pests. They contain naturally occurring beneficial microorganisms that infect, suppress, or kill harmful insects without leaving harmful residues. These biological products are safe for beneficial organisms, improve ecological balance, and support sustainable tea production.

Why Tea Farmers Should Use Biopesticides

Tea is a perennial crop where repeated pesticide applications are common. Continuous chemical spraying can disturb the natural ecosystem of tea gardens. Biopesticides provide long-term pest suppression while preserving beneficial insects and maintaining soil biodiversity.

Benefits

• Eco-friendly pest management
• Safe for tea workers
• Minimal pesticide residue
• Protects beneficial insects
• Reduces pest resistance
• Suitable for integrated pest management (IPM)
• Safe for organic tea cultivation
• Improves plantation sustainability
• Reduces chemical pesticide dependence
• Produces healthier tea leaves

Major Tea Pests Controlled by Biopesticides

Biopesticides help manage several economically important pests, including:

• Tea mosquito bug
• Tea thrips
• Tea jassids (leafhoppers)
• Aphids
• Mealybugs
• Whiteflies
• Caterpillars
• Loopers
• Cutworms
• Termites
• White grubs
• Soil-dwelling insect larvae

Recommended Biopesticides for Tea Plantation

Beauveria bassiana

Beauveria bassiana is an entomopathogenic fungus that infects and kills a wide range of soft-bodied and chewing insects.

Controls

• Tea mosquito bug
• Whiteflies
• Aphids
• Mealybugs
• Caterpillars
• Beetles

Benefits

• Natural insect control
• Safe for beneficial insects
• Reduces repeated chemical sprays
• Long-lasting biological activity

Metarhizium anisopliae

Metarhizium is highly effective against soil insects and beetle larvae.

Controls

• White grubs
• Termites
• Root-feeding larvae
• Soil insects

Benefits

• Protects root system
• Reduces grub damage
• Improves root development
• Long-term soil protection

Verticillium lecanii (Lecanicillium lecanii)

Verticillium is widely used for sucking pests commonly found in tea plantations.

Controls

• Aphids
• Thrips
• Whiteflies
• Mealybugs
• Scale insects

Benefits

• Controls sap-sucking insects
• Reduces honeydew formation
• Improves leaf health
• Compatible with IPM

Bacillus thuringiensis (BT)

BT is a biological insecticide effective against caterpillars and leaf-feeding larvae.

Controls

• Caterpillars
• Loopers
• Leaf-eating larvae

Benefits

• Selective insect control
• Safe for pollinators
• No harmful residue
• Excellent for IPM programs

How Biopesticides Work

Beneficial microorganisms naturally infect insect pests through contact or ingestion.

After infection:

• Microorganisms multiply inside the insect.
• Feeding gradually stops.
• Insects become inactive.
• Pest population declines naturally.
• Beneficial microbes continue spreading among susceptible insects under suitable environmental conditions.

Application Methods

Foliar Spray

Spray uniformly on both upper and lower leaf surfaces during early morning or late evening.

Soil Application

Apply Metarhizium around the root zone for white grub and termite management.

Nursery Application

Protect young tea plants from early pest attack.