Fruit, pod and tuber rots

Powdery mildew, die-back and fruit rot

Powdery mildew: spray wettable sulphur at 3 g per litre (or carbendazim at 1 g per litre) three times at 15-day intervals from the first appearance of symptoms. Die-back and fruit rot: spray mancozeb at 2 g per litre or copper oxychloride at 2.5 g per litre three times at 15-day intervals, starting when die-back symptoms are noticed.

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 – Diseases (Powdery mildew; die-back and fruit rot), p. 77

Region

Tamil Nadu

Last updated

2026-11-04

Powdery mildew and fruit rots

Powdery mildew: spray wettable sulphur at 0.2%. Anthracnose and stalk-end rot: spray mancozeb at 2 g per litre (or carbendazim at 1 g per litre) as a pre-harvest spray, three times at 15-day intervals.

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)), Mango – Diseases (Powdery mildew; anthracnose & stalk end rot)

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for powdery mildew, anthracnose, die-back and fruit rot, nematodes and sucking pests (growth-regulator sprays are also listed). 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)), Capsicum – Diseases; nematodes and sucking pests, p. 80

Region

Tamil Nadu

Last updated

2026-11-05

Sweet potato weevil

Remove and destroy previous crop residues and wild Ipomoea plants. Use pest-free planting material and set pheromone traps from crop establishment. Rake up and earth up the soil at 50 days. Harvest as soon as the crop matures and destroy the residues. (A chemical drench for soft rot 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)), Sweetpotato – Plant protection (sweetpotato weevil), p. 138

Region

Tamil Nadu

Last updated

2026-11-04

Whitefly and mosaic: non-chemical measures in the source

Mosaic spreads through whitefly. Take planting material only from healthy plants; remove the weed host Abutilon indicum; set yellow sticky traps (12/ha); use nitrogen carefully; avoid excess irrigation; do not keep the crop beyond its duration. Neem oil 3% is also listed. Papaya mealybug: release the parasitoid Acerophagus papayae (100 per acre). Tuber rot: avoid waterlogging and provide drainage; Trichoderma asperellum 2.5 kg/ha at planting and at the 3rd and 6th months.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Tapioca – Plant protection (whitefly, mosaic, mealybug, tuber rot), pp. 141–142

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for whitefly, mosaic vectors, Cercospora leaf spot and tuber 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)), Tapioca – Plant protection, pp. 141–142

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

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

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

Chemicals: ask before you use

The source also lists chemical cutting treatments, growth regulator sprays (NAA, ethrel) and fungicides for fruit rot. 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)), Pomegranate – Propagation, flower regulation & plant protection, pp. 36–38

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases

Spittle bug: spread yellow sticky sheets (3 ft x 2 ft) to trap the bugs. Chemical options for spittle bug and Rhizopus fruit 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)), Jack – Plant protection, p. 39

Region

Tamil Nadu

Last updated

2026-11-05

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