Sucking pests are among the most damaging insect groups in tea plantations. Insects such as aphids, thrips, whiteflies, mealybugs, and scale insects feed by sucking plant sap from tender leaves and young shoots. This weakens tea bushes, reduces leaf quality, slows shoot growth, and lowers overall tea production.

Frequent use of chemical insecticides may temporarily reduce pest populations, but repeated applications often result in pesticide resistance, destruction of beneficial insects, chemical residues, and increased production costs.

Verticillium lecanii (currently classified as Lecanicillium lecanii) is a beneficial entomopathogenic fungus that naturally infects and controls sucking pests. It is widely used in Integrated Pest Management (IPM) and organic tea cultivation because it provides effective biological control without harming the environment.

What is Verticillium lecanii?

Verticillium lecanii is a naturally occurring fungus that infects soft-bodied insects. After spraying, fungal spores attach to the insect, penetrate its body, multiply internally, and eventually kill the pest.

Unlike chemical insecticides, Verticillium continues working under suitable environmental conditions and helps reduce pest populations naturally.

Why Tea Farmers Should Use Verticillium lecanii

Tea bushes produce tender shoots continuously, making them attractive to sucking insects throughout the season.

Regular application of Verticillium helps maintain healthy tea bushes while reducing chemical pesticide dependence.

Major Benefits

• Controls sucking pests naturally
• Safe for beneficial insects when properly used
• Reduces pesticide residues
• Suitable for IPM programs
• Supports organic tea farming
• Reduces insect resistance
• Improves tea quality
• Eco-friendly pest management
• Safe for workers and the environment
• Increases plantation productivity

Major Tea Pests Controlled

Verticillium lecanii effectively manages many important sucking pests.

It helps control:

• Aphids
• Thrips
• Whiteflies
• Mealybugs
• Scale insects
• Soft-bodied sap-sucking insects

How Verticillium lecanii Works

The fungus naturally infects insects through several stages.

Spore Attachment

Spores stick to the insect's body after spraying.

Germination

Under humid conditions, spores germinate and penetrate the insect cuticle.

Internal Infection

The fungus multiplies inside the insect and consumes internal tissues.

Pest Death

The insect gradually stops feeding, becomes inactive, and dies naturally.

Natural Spread

New fungal spores develop on infected insects and help spread biological control to nearby pest populations.

Application Methods

Foliar Spray

Spray thoroughly on both upper and lower leaf surfaces where sucking pests feed.

Preventive Spray

Apply before pest populations become severe for better biological control.

Curative Spray

Spray immediately after early pest infestation is observed.