Rust

Chemical pesticides: ask before you spray

The source lists insecticides and fungicides for shoot fly, stem borer, aphids, fall armyworm, leaf blights, rust and downy mildew. 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)), Maize – Pest & disease management, pp. 113–114

Region

Tamil Nadu

Last updated

2026-11-04

Rust

For rust, spray mancozeb at 1 kg/ha, and repeat the fungicide application after 10 days.

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)), Sorghum – Disease management (Rust), p. 78

Region

Tamil Nadu

Last updated

2026-11-04

Rust and leaf spots

For rust and leaf spots (early and late leaf spot), spray mancozeb at 1000 g per hectare or chlorothalonil at 1000 g per hectare; if necessary, repeat the spray 15 days later. For combined infection of rust and leaf spot, the source also lists a 10% Calotropis leaf extract spray.

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 – Disease management (Rust, leaf spots), pp. 195–196

Region

Tamil Nadu

Last updated

2026-11-04

Powdery mildew, rust and yellow mosaic: non-chemical measures

Powdery mildew: spray NSKE 5% or neem oil 3% twice at a 10-day interval from the first symptoms. Rust: spray 10% eucalyptus leaf extract when the disease starts and 10 days later. Yellow mosaic (spread by whitefly): install yellow sticky traps at 12 per hectare, rogue out virus-infected plants up to 45 days, and spray 10% notchi leaf extract at 30 days or a neem formulation at 3 ml per litre.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Greengram – Disease management (Powdery mildew, rust, yellow mosaic), pp. 149–150

Region

Tamil Nadu

Last updated

2026-11-04

Chemical pesticides: ask before you spray

The source lists insecticides and fungicides for stem fly, aphids, whitefly, pod borers, rust, leaf spot and leaf curl. 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)), Greengram – Pest & disease management, pp. 148–150

Region

Tamil Nadu

Last updated

2026-11-04

Chemical pesticides: ask before you spray

The source lists chemical pesticides for stem fly, aphids, whitefly, blue butterflies, spotted pod borer, pod bug and rust. 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)), Cowpea – Pest & disease management, pp. 155–156

Region

Tamil Nadu

Last updated

2026-11-04

Chemical pesticides: ask before you spray

The source lists insecticides for caterpillars, girdle beetle, leaf weevil and virus vectors, and fungicides for rust. 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)), Soyabean – Crop protection, p. 177

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for aphids, flea beetle, mustard sawfly, stem borer and white rust. 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)), Radish – Plant protection, pp. 130–131

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

Chemical sprays: ask before you spray

The source lists chemical sprays for tea mosquito bug, fruit fly, red rust and fruit rots. Fruits are eaten fresh, so 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)), Guava – Plant protection, p. 29

Region

Tamil Nadu

Last updated

2026-11-04

Pests, diseases and hormones: ask before you spray

Remove loose bark at pruning to stop pests laying eggs. The source lists chemical sprays for flea beetles, nematodes, powdery mildew, downy mildew, anthracnose, rust and bacterial leaf spot, and a schedule of growth hormones (GA3 and others) for berry size. Hormone timing and dose are critical — for example, the source warns against GA3 in cloudy weather and from full bloom to fruit set. Choose any product only with your local Horticulture 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)), Grapes – Plant protection; quality improvement, pp. 24–27

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for leaf miner, aphids, rust mite, fruit-sucking moth, shoot borer, citrus butterfly, psyllid, fruit fly, mealybugs, nematodes, twig blight, scab and canker, and growth-regulator sprays for fruit set. 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)), Acid Lime – Plant protection, pp. 15–16

Region

Tamil Nadu

Last updated

2026-11-04

Rust and fruit rot

Ring rust: spray mancozeb 0.2% at 7–28-day intervals during July–September. Fruit rot (bird's eye spot): spray copper oxychloride 2.5 g/l at flowering; after harvest, treat fruits with borax or common salt (NaCl) at 20 g/l.

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)), Amla – Diseases, p. 42

Region

Tamil Nadu

Last updated

2026-11-04

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