Thrips

Chemical insecticides: ask before you spray

The source lists insecticides for red hairy caterpillar, tobacco caterpillar, leafhopper, leafminer, earwig, white grubs, aphids, thrips and termites. Many are hazardous, and some may be restricted. Choose a product only with your local Agriculture Officer, and spray only after the pest crosses the threshold level.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Groundnut – Pest management strategies, pp. 193–195

Region

Tamil Nadu

Last updated

2026-11-04

Bud necrosis virus

Spray antiviral principles (AVP) from sorghum or coconut leaves twice, at 10 and 20 days after sowing. To prepare: dry and powder the leaves; add 2 litres of water to 1 kg of leaf powder, heat to 60°C for one hour, filter through muslin cloth and dilute to 10 litres. About 500 litres of spray fluid is needed for one hectare. The disease is spread by thrips; in areas where it is common, use the wider 15 cm x 15 cm spacing.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Groundnut – Disease management (Bud necrosis), p. 196

Region

Tamil Nadu

Last updated

2026-11-04

When to act: pest threshold levels

Economic threshold levels given for cotton: thrips – 50 nymphs or adults per 50 leaves; aphids – 15% of plants infested; leafhopper – 50 nymphs or adults per 50 leaves; mite – 10 per cm² of leaf; spotted and spiny bollworms – 10% of shoots, squares or bolls infested; pink bollworm – 10% of fruiting parts infested; Helicoverpa (American bollworm) – one egg or one larva per plant; whiteflies – 5–10 per leaf; stem weevil – 10% infestation; tobacco cutworm – 8 egg masses per 100 m row.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Cotton – Economic threshold levels, p. 272

Region

Tamil Nadu

Last updated

2026-11-04

Fruit borer and thrips: non-chemical measures

For fruit borer, set up pheromone traps for Helicoverpa armigera and Spodoptera litura at 12 per hectare, collect and destroy damaged fruits and grown-up caterpillars, and spray Bacillus thuringiensis at 2 g per litre. For thrips, grow agathi as an intercrop.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Chilli – Plant protection (Fruit borer, thrips), pp. 75–76

Region

Tamil Nadu

Last updated

2026-11-04

Chemical pesticides: ask before you spray

The source lists many insecticides and acaricides for fruit borer, thrips, aphids and mites. Many are hazardous, and some may be restricted. Choose a product only with your local Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Chilli – Plant protection, pp. 75–77

Region

Tamil Nadu

Last updated

2026-11-04

Chemical pesticides: ask before you spray

The source lists chemical sprays for cutworms and Helicoverpa, mealybug, bud borer, thrips and red spider mite. Many are hazardous, and some may be restricted. Choose a product only with your local Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Marigold (precision) – Plant protection, p. 258

Region

Tamil Nadu

Last updated

2026-11-04

Chemical pesticides: ask before you spray

The source lists insecticides for semilooper, hairy caterpillars, other defoliators and flower thrips, and fungicides for castor diseases. Many are hazardous, and some may be restricted. Choose a product only with your local Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Castor – Crop protection, pp. 210–212

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical sprays for thrips, root grub, nematodes and leaf spot / purple blotch. Choose any product only with your local Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Big onion – Plant protection, pp. 151–152

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical sprays for aphids, jassids, fruit borers and caterpillars, red spider mite, powdery mildew and downy mildew, and lists red pumpkin beetle, leaf miner, thrips, whitefly and pumpkin caterpillar among the pests. Choose any product only with your local Horticulture or Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Pumpkin – Plant protection, p. 83

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for cutworms, tuber moth, aphids, jassids, thrips, late blight, early blight and the aphids that spread viruses. Choose any product only with your local Horticulture or Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Potato – Plant protection, pp. 135–137

Region

Tamil Nadu

Last updated

2026-11-04

Chemicals: ask before you use

The source also lists chemical rhizome treatments and sprays for rhizome rot, scales, thrips, nematodes and leaf spots. Choose any product only with your local Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Turmeric – Transplants technology; plant protection, pp. 171–173

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for gall thrips, pollu beetle, leaf caterpillars, top shoot borer, foot rot, slow wilt and anthracnose. Choose any product only with your local Horticulture or Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Pepper – Plant protection, p. 166

Region

Tamil Nadu

Last updated

2026-11-05

Pests and diseases: non-chemical measures in the source

Shoot, panicle and capsule borer: pheromone traps at 12 per hectare. Mosaic (katte) disease, a serious disease, is spread by the banana aphid. The source also lists chemical sprays for thrips, aphids, hairy caterpillars, mites, damping off and capsule rot (azhukal) — ask your officer before using any.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Cardamom – Plant protection, pp. 169–170

Region

Tamil Nadu

Last updated

2026-11-05

Pests and diseases: ask before you spray

The source lists chemical treatments for thrips, nematodes, purple blotch and clove rot, and a weedicide. For nematodes it also lists the bio-agent Paecilomyces lilacinus at 2.5 kg/ha. Choose any chemical only with your local Horticulture or Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Garlic – Plant protection; diseases, pp. 154–155

Region

Tamil Nadu

Last updated

2026-11-04

Chemicals: ask before you use

The source lists insecticides for weevils, aphids and thrips, sucker dips and corm injections for wilt, fungicide sprays for Sigatoka, and chemical methods to kill bunchy-top plants. Choose any product only with your local Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Banana – Plant protection, pp. 11–12

Region

Tamil Nadu

Last updated

2026-11-04

Pests: non-chemical measures in the source

Rose chafer beetle: hand-pick the beetles during the day and destroy them. White grub: set up a light trap to attract the adult beetles. Red scale: rub off the scales with cotton soaked in kerosene, and cut and burn affected branches. Neem oil 3% is listed for thrips, aphids and leafhoppers.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Rose – Pests (non-chemical measures), pp. 248–249

Region

Tamil Nadu

Last updated

2026-11-05

Pests and diseases: ask before you spray

The source lists chemical sprays for chafer beetle, white grub, red scale, mealybug, thrips, aphids, leafhoppers, two-spotted mite, black spot and powdery mildew. Choose any product only with your local Horticulture or Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Rose – Plant protection, pp. 248–249

Region

Tamil Nadu

Last updated

2026-11-05

Pests and diseases: ask before you spray

The source lists chemical sprays for thrips, aphids, leaf-eating caterpillars, root rot and leaf spot. Choose any product only with your local Horticulture or Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Chrysanthemum – Plant protection, pp. 256–257

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for thrips, aphids, root-knot nematode, weeds and basal/stem rot. Choose any product only with your local Horticulture or Agriculture Officer.

Follow the instructions on the product label. Consult your local Agriculture Officer before use.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Tuberose – Plant protection, p. 260

Region

Tamil Nadu

Last updated

2026-11-04

Pests: non-chemical measures in the source

Stem borer: locate the frass mat at the base of the bush, remove it, and push a thick wire into the bore hole to kill the larva. Tea mosquito bug: monitor regularly and remove alternate hosts such as neem, cashew and guava nearby. Neem-based azadirachtin is listed for thrips and mites. Chemical options for scales, thrips, aphids, mites, tea mosquito bug and blister blight are also listed — ask your officer.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Tea – Plant protection, p. 195

Region

Tamil Nadu

Last updated

2026-11-05

Pests: non-chemical measures in the source

Tukra (pink mealybug): cut and burn affected shoots, release predatory beetles (Cryptolaemus 750/ha or Scymnus 1000/ha) or Chrysoperla eggs (2500/ha), and spray neem oil 3% with a wetting agent. Thrips: neem oil 3% is also listed. Leaf webber: irrigate right after pruning. Chemical sprays with waiting periods before feeding leaves to silkworms are also listed — ask your Sericulture or Agriculture Officer.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Sericulture – Mulberry pest and disease management, p. 365

Region

Tamil Nadu

Last updated

2026-11-05