Root, stem and collar rots

Root rot

For root rot, spot drench with carbendazim at 1 g per litre of water.

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)), Redgram – Disease management (Root rot), p. 131

Region

Tamil Nadu

Last updated

2026-11-04

Root rot

Apply Pseudomonas fluorescens at 2.5 kg per hectare with 50 kg of well-decomposed FYM or sand to the soil at 30 days after sowing.

Source

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

Region

Tamil Nadu

Last updated

2026-11-04

Wilt and root rot

Apply Pseudomonas fluorescens (or Trichoderma asperellum for root rot) at 2.5 kg/ha with 50 kg of well-decomposed FYM or sand to the soil.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Bengalgram – Disease management (Wilt, root rot), p. 165

Region

Tamil Nadu

Last updated

2026-11-04

Chemical pesticides: ask before you spray

The source lists many insecticides for aphids and gram caterpillar, and fungicides for root rot. 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)), Bengalgram – Pest & disease management, pp. 164–165

Region

Tamil Nadu

Last updated

2026-11-04

Root rot

Apply zinc sulphate at 25 kg/ha and neem cake at 150 kg/ha basally. Apply Pseudomonas fluorescens or Trichoderma asperellum at 2.5 kg/ha with 50 kg of well-decomposed FYM or sand to the soil at 30 days after sowing.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Greengram – Disease management (Root rot), p. 150

Region

Tamil Nadu

Last updated

2026-11-04

Root rot

Apply Pseudomonas fluorescens or Trichoderma asperellum at 2.5 kg/ha with 50 kg of well-decomposed FYM or sand to the soil.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Cowpea – Disease management (Root rot), p. 156

Region

Tamil Nadu

Last updated

2026-11-04

Root rot and phyllody

Root rot: apply Pseudomonas fluorescens or Trichoderma asperellum at 2.5 kg/ha with 50 kg of well-decomposed FYM or sand at 30 days after sowing. Phyllody (spread by a leafhopper): remove and destroy infected plants; neem seed kernel extract 5% or neem oil 2% against the vector, combined with intercropping sesame + red gram (6:1).

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Sesame – Disease management (Root rot, phyllody), p. 203

Region

Tamil Nadu

Last updated

2026-11-04

Chemical pesticides: ask before you spray

The source lists insecticides and fungicides for sesame pests, powdery mildew, leaf spots and root rot. 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)), Sesame – Pest & disease management, pp. 202–203

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for Cercospora leaf spot and Rhizoctonia root rot, and lists leaf miner and flea beetle as 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)), Beetroot – Plant protection, p. 133

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for white grub, stem weevil, leafhoppers, aphids, ash weevils, pod borer, powdery mildew, rust, anthracnose, leaf spot and root 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)), French bean – Plant protection, pp. 111–113

Region

Tamil Nadu

Last updated

2026-11-05

Collar rot

Caused by a soil fungus; waterlogging, poor drainage and injury at the collar favour it. Use disease-free planting material, remove infected plants, improve drainage, add neem cake, and apply Trichoderma harzianum 2.5 kg/ha mixed with 50 kg FYM. (A chemical soil drench is 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)), Elephant foot yam – Diseases (collar rot), p. 144

Region

Tamil Nadu

Last updated

2026-11-04

Rhizome scale and rhizome rot

Rhizome scale: apply well-rotted sheep manure at 10 t/ha (or poultry manure) in two splits, basal and at earthing up. Rhizome rot: treat seed rhizomes with Pseudomonas fluorescens 10 g/kg or Trichoderma asperellum 4 g/kg, and apply 2.5 kg/ha each of P. fluorescens and T. asperellum with 50 kg FYM as basal and again at 150 days.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Turmeric – Pests; rhizome rot, p. 173

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

Soft rot and rhizome rot

Provide adequate drainage and select healthy, disease-free seed rhizomes. For rhizome rot, treat rhizomes with Pseudomonas fluorescens at 20 g/kg and apply 2.5 kg/ha to the soil immediately after planting and again at 45 days.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Ginger – Diseases (Soft rot; rhizome rot), p. 175

Region

Tamil Nadu

Last updated

2026-11-04

Chemicals: ask before you use

The source lists chemical rhizome treatments and drenches for soft rot, rhizome rot and leaf spot, and sprays for shoot borer and leaf roller. 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)), Ginger – Seed treatment; plant protection, pp. 174–175

Region

Tamil Nadu

Last updated

2026-11-04

Root rot and powdery mildew

Root rot: neem cake 150 kg/ha to the soil and seed treatment with Trichoderma asperellum 4 g/kg (or 5 kg/ha to the soil). Chemical drenches and sulphur options for root rot and powdery mildew 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)), Fenugreek – Plant protection, p. 188

Region

Tamil Nadu

Last updated

2026-11-05

Foot rot and nematodes: biological measures in the source

Foot rot in the nursery: mix Trichoderma asperellum or Pseudomonas fluorescens at 1 g per kg of pot mixture. In the field, packages applied twice (May–June and October–November) include neem cake 500 g per vine with Bordeaux paste on the stem up to 1 m, or Trichoderma 20 g per vine with FYM. Nematodes: Bacillus subtilis or Pseudomonas fluorescens 10 g per vine to the soil.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Pepper – Diseases (foot rot); nematode, pp. 166–167

Region

Tamil Nadu

Last updated

2026-11-05

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

Ringspot virus, root rot and nematodes

Papaya ringspot: raise seedlings in an insect-proof net house, grow two rows of maize as a border crop one month before transplanting, and apply 10 kg FYM per pit. Root rot appears in waterlogged areas, so good drainage is vital. Against nematodes, apply neem cake 250 g per plant or Pseudomonas fluorescens 4 g per plant.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Papaya – Plant protection (nematodes, root rot, ringspot), p. 34

Region

Tamil Nadu

Last updated

2026-11-04

Chemical sprays: ask before you spray

The source lists a seed fungicide, soil drenches for root rot and insecticide sprays against the ringspot virus vector. 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)), Papaya – Plant protection, p. 34

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

Yellowing of leaves has three main causes: iron deficiency, nematodes and root rot. The source lists chemical treatments for bud worm, blossom midge, red spider mite, nematodes, root rot and Alternaria leaf spot. It also lists Pseudomonas fluorescens: 25 g/m² to the soil and a 5 g/l foliar spray monthly after planting. 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)), Malligai – Plant protection, pp. 250–251

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

Other pests and diseases: ask before you treat

The source also lists chemical treatments for black-headed caterpillar, eriophyid mite, basal stem rot, bud rot and stem bleeding, including root feeding and crown sprays. Some require not harvesting nuts for a period after treatment. Choose any treatment 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)), Coconut – Pest and disease management, pp. 215–219

Region

Tamil Nadu

Last updated

2026-11-05

Diseases and disorders: non-chemical measures in the source

Bud rot: scoop out infected tissue and treat with Bordeaux paste; remove and destroy affected palms and bunches. Foot rot: isolate affected palms with trenches, cut and destroy severely affected palms, pull out stumps and improve drainage. Stem breaking: wrap the green part of the stem exposed to the south-west sun. Yellow leaf disease: balanced nutrients with extra superphosphate, 1 kg lime and 12 kg organic manure per palm per year. Nematodes: Pseudomonas fluorescens and Bacillus subtilis 10 g each. Chemical sprays for mites, spindle bug and leaf spot and Bordeaux drenches 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)), Arecanut – Plant protection, p. 224

Region

Tamil Nadu

Last updated

2026-11-05

Pests and diseases: non-chemical measures in the source

Rhinoceros beetle: trap adults with fermented castor cake or pheromone baits; use the bio-agents Baculovirus oryctes and Metarhizium anisopliae. Red palm weevil: remove damaged and rotten bunches, apply tar to wounds and cuts on the stem, and trap adults with pheromone baits. Basal stem rot: remove and destroy diseased palms and apply 5 kg neem cake per tree per year. Chemical treatments for the compost pit, bud rot and basal stem rot 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)), Oil Palm – Plant protection, p. 227

Region

Tamil Nadu

Last updated

2026-11-05

Pests and diseases: non-chemical measures in the source

White stem borer (Arabica under poor shade): keep optimum shade; trace and uproot infested plants in March and September; pheromone traps (25/ha) if severe; rub off loose scaly bark. Berry borer: harvest on time and thoroughly, pick up gleanings and leftover berries, remove off-season berries, avoid excess shade, prune for ventilation, and dry berries to the right moisture (parchment 10%, Arabica cherry 10.5%, Robusta cherry 11%). Shot-hole borer: prune affected branches. Scales and mealybugs: release Cryptolaemus beetles (300 per acre). Black root rot: dig out and burn infected bushes, trench around the spot, and do not replant for 18 months. Chemical options for these and for rust, black rot and collar rot 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)), Coffee – Plant protection, pp. 199–200

Region

Tamil Nadu

Last updated

2026-11-05