Metarhizium anisopliae for Black Pepper – Control Thrips, Root Weevils & Termites

Idukki's black pepper is world‑renowned for its pungency and aroma. But this valuable crop is under constant attack from multiple pests – both above ground and below ground.

Thrips are the most damaging above‑ground pest. They rasp the surface of developing pepper berries, causing brown, corky scars. Once scarred, berries cannot be sold as whole black pepper and fetch a much lower price. Thrips are difficult to control because they hide inside flower buds and unopened leaves, where chemical sprays cannot reach. Research has demonstrated that Metarhizium anisopliae is effective against thrips on pepper. In fact, Metarhizium anisopliae strain F52 has been formulated into commercial bioinsecticides like Met52 EC, which is applied as a foliar spray and reduces thrips numbers on greenhouse pepper, greenhouse tomato, and greenhouse strawberry.

Root weevils and white grubs are the most damaging below‑ground pests. The black vine weevil and other root weevil species feed on pepper roots, causing wilting, yellowing, and eventual vine collapse. White grubs (the larval stage of various beetles) also feed on roots, weakening the plant and making it susceptible to other pests and diseases. Once the roots are damaged, the vine cannot take up water and nutrients, and it dies. Chemical soil drenches are often ineffective because the grubs are deep in the soil and resistant to many pesticides.

Termites attack both roots and stems. In Idukki's pepper‑growing areas, termites can cause sudden wilting and collapse of otherwise healthy vines. They build mud tubes on the stem and feed on the inner tissues, cutting off the flow of water and nutrients.

Metarhizium anisopliae is the natural solution for all these pests.

How Metarhizium anisopliae works: The fungal spores land on the pest's body, germinate, and produce an appressorium that penetrates the insect's cuticle. Once inside, the fungus grows rapidly, consuming the insect from within and producing toxins called destruxins. The insect stops feeding within 24‑48 hours and dies completely within 3‑7 days. After death, green mold appears on the dead insect – this is why Metarhizium is called the "green muscardine fungus." The mold produces new spores that can infect nearby pests. Importantly, Metarhizium spores can survive in soil, organic matter, and debris of dead infected insects, and can infect another insect by secondary infection – providing long‑term, sustainable control.

How Metarhizium anisopliae benefits your pepper farm:

• Controls thrips, root weevils, termites, white grubs, beetles, weevils, whiteflies, mealybugs, and aphids

• Protects berry quality – no thrips scarring, higher market price

• Protects root system – kills root‑feeding pests before they can destroy your vines

• Zero chemical residues – safe for export to EU, USA, and Middle East

• Safe for pollinators and beneficial insects – primarily targets pest insects when used correctly

• No pest resistance – fungi evolve faster than pests; resistance is extremely rare

• Can be sprayed up to harvest day – no waiting period

• Compatible with neem oil and other biopesticides (test small area first)

• Can be used in organic certification programs

How to apply Metarhizium anisopliae on black pepper (Bactostore method):

Foliar spray (for thrips, whiteflies, aphids, and other foliar pests):

• For liquid formulation: Mix 3‑5 ml of Bactostore's Metarhizium anisopliae liquid in 1 litre of water. For 1 acre, use 1‑2 litres of liquid diluted in 200‑400 litres of water.

• For powder formulation: Mix 5‑10g of Bactostore's Metarhizium powder in 1 litre of water. For 1 acre, use 1‑2 kg of powder diluted in 200‑400 litres of water.

• For better results, add 2 kg jaggery (gur) to the mixture and let it sit overnight – the sugar feeds the fungus, boosting spore germination.

• Spray thoroughly on leaves, stems, spikes, and berries. Pay special attention to the underside of leaves where thrips and whiteflies hide.

• Spray in early morning or late evening when humidity is high. Cloudy days are ideal.

• For thrips control: repeat every 10‑15 days during flowering and berry development.

• Keep the field environment wet – maintaining soil and foliar moisture is essential for Metarhizium to work effectively.

Soil application (for root weevils, white grubs, termites, and other soil pests):

• Soil drench method: Mix 1‑2 litres of liquid Metarhizium in 200 litres of water. Drench the solution directly around the root zone of each pepper vine. For severe infestations, apply 1‑2 litres of drench solution per vine.

• FYM mix method: Mix 1‑2 kg of Metarhizium powder with 100‑200 kg of well‑decomposed farmyard manure or cow dung. Apply this mixture in the basin around each pepper vine. For individual vines, 25‑50g of powder mixed with cow dung is sufficient.

• Apply soil treatments pre‑monsoon or at the beginning of the growing season.

• Reapply every 3‑4 months for continuous protection.

For young pepper vines (root dip before planting):

• Mix 10 ml of Metarhizium anisopliae liquid in 1 litre of water.

• Dip the roots of young pepper cuttings for 10 minutes before planting.

• This protects young vines from soil‑borne pests like termites, root weevils, and white grubs from day one.

Important tips for pepper farmers:

• Metarhizium works best in high humidity and moist soil – perfect for Idukki's climate

• Do not mix with chemical fungicides – they will instantly kill the beneficial fungus

• Wait 7‑10 days after chemical fungicide use before applying Metarhizium

• For best results, apply preventively before pest populations explode

• If infestation is severe, combine with neem oil (test small area first – some Metarhizium strains are compatible with neem, others may be sensitive)

• Apply in cloudy days or evening to avoid direct sunlight, which kills spores

Why Metarhizium is better than chemical pesticides for thrips and root pests:

• Chemical insecticides for thrips often fail because thrips develop resistance quickly. Metarhizium works through a completely different mechanism – fungal infection – so there is no cross‑resistance. Even if thrips have become resistant to chemicals, they remain susceptible to Metarhizium.

• For root pests like weevils and grubs, chemical soil drenches often do not reach deep enough or are degraded in soil. Metarhizium spores can persist in soil and actively hunt down pests through contact.

Buy from Bactostore. We deliver fresh Metarhizium anisopliae – liquid or powder – to all Idukki pepper farms. Mention "Pepper pest control" for a 5% discount.

📞 Call 9146150117 | 🌐 www.peaklab.co.in