Aphids

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

When to act: pest threshold levels

Economic threshold levels (ETL) given for red gram: aphids – 20 per 2.5 cm shoot length; pod borers – 10% of pods affected; plume moth – 5 larvae per plant; spotted pod borer – 3 larvae per plant.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Redgram – Crop protection, ETL, p. 130

Region

Tamil Nadu

Last updated

2026-11-04

Chemical insecticides: ask before you spray

The source lists several insecticides for aphids, pod borers, plume moth, pod fly and pod bugs. 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)), Redgram – Pest management strategies, pp. 130–131

Region

Tamil Nadu

Last updated

2026-11-04

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

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

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

When to act: pest threshold levels

Economic threshold levels for Bengal gram: gram caterpillar (Helicoverpa) – 2 early-stage larvae per plant, or 5–8 eggs per plant; aphids – 20 per 2.5 cm shoot length.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Bengalgram – Crop protection, ETL, p. 164

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

When to act: pest threshold levels

Economic threshold levels for green gram: aphids – 20 per 2.5 cm shoot length; pod borers – 10% of pods affected; spotted pod borer – 3 per plant; stem fly – 10% of plants affected; tobacco cutworm – 8 egg masses per 100 m.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Greengram – Crop protection, ETL, p. 148

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

When to act: pest threshold levels

Economic threshold levels for black gram: aphids – 20 per 2.5 cm shoot length; pod borers – 10% of pods affected; spotted pod borer – 3 larvae per plant.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Blackgram – Crop protection, ETL, p. 140

Region

Tamil Nadu

Last updated

2026-11-04

When to act: pest threshold levels

Economic threshold levels for cowpea: aphids – 20 per 2.5 cm shoot length; spotted pod borer – 3 larvae per plant; stem fly – 10% of plants affected.

Source

Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Cowpea – Crop protection, ETL, p. 155

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

Shoot and fruit borer, whitefly and beetles: IPM

Shoot and fruit borer: clip and destroy affected shoot tips with bore holes and affected fruits; avoid synthetic pyrethroids; spray neem seed kernel extract 5% from one month after planting at 15-day intervals; monitor moths with pheromone traps and release Trichogramma after each brood. Whitefly: yellow sticky traps at 12 per hectare, neem oil 3% with teepol 1 ml/l, and maize as a border crop. Epilachna beetle: collect and destroy beetles, grubs and pupae. Aphids: release green lacewing larvae (Chrysoperla) at 10,000 per hectare. Apply neem cake at 250 kg/ha.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Brinjal – Pests; IPM package, pp. 65–67

Region

Tamil Nadu

Last updated

2026-11-04

Chemical pesticides: ask before you spray

The source lists chemical sprays for fruit borers, leafhopper, aphids, mites, whiteflies, powdery mildew and nematodes. Many are hazardous, and some may be restricted. Vegetables 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)), Bhendi – Plant protection, pp. 70–71

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: non-chemical measures in the source

Aphids: yellow sticky traps (12/ha) to monitor; neem oil 3%. Diamondback moth: grow mustard as a trap crop (cabbage to mustard at 20:1), set pheromone traps (12/ha), and spray Bacillus thuringiensis 2 g/l or NSKE 5% at the early stage. Club root: Pseudomonas fluorescens 10 g/kg seed, seedling dip 5 g/l and 2.5 kg/ha in the soil with 50 kg FYM; rotate crops and avoid cabbage-family crops for three years.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Cabbage – Plant protection (non-chemical measures), pp. 121–123

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists many chemical sprays for aphids, leaf-eating caterpillars, diamondback moth, club root, leaf spots, leaf blight, ring spot, downy mildew and black 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)), Cabbage – Plant protection, pp. 121–123

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: non-chemical measures in the source

Aphids: yellow sticky traps (12/ha); neem oil 3%. Diamondback moth: mustard as a trap crop (20:1), pheromone traps (12/ha), NSKE 5%. Club root: Pseudomonas fluorescens 10 g/kg seed, seedling dip 5 g/l and 2.5 kg/ha in the soil with 50 kg FYM before planting.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Cauliflower – Plant protection (non-chemical measures), pp. 126–127

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical sprays for aphids and diamondback moth and a chemical seedling dip for club root. 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)), Cauliflower – Plant protection, pp. 126–127

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 weeds: ask before you spray

The source lists a chemical spray for aphids and jassids and pre-emergence weedicides. 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)), Cucumber – Plant protection; sowing (herbicide), pp. 98–99

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. 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)), Bottle gourd – Plant protection, pp. 90–91

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. 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)), Bitter gourd – Plant protection, pp. 93–94

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. 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)), Ribbed gourd – Plant protection, p. 88

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. 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)), Snake gourd – Plant protection, pp. 85–86

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 sprays for aphids, jassids, fruit borers and caterpillars, red spider mite, powdery mildew and downy 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)), Ash gourd – Plant protection, pp. 96–97

Region

Tamil Nadu

Last updated

2026-11-04

Pests and diseases: ask before you spray

The source lists chemical treatments for leafhoppers, aphids, whitefly, ash weevils, leaf spot and powdery mildew (neem-based azadirachtin is listed for ash weevils). 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)), Cluster bean – Plant protection, pp. 107–108

Region

Tamil Nadu

Last updated

2026-11-05

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

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

Leaf blight

Leaf blight can cause up to 50% loss in severe cases. Non-chemical measures in the source: field-resistant varieties (Muktakeshi, Jankhri), early planting to avoid heavy monsoon rain, healthy planting material, removing self-grown taro plants, and treating seed tubers with Trichoderma viride. Fungicide sprays and chemical dips for aphids, mealybugs and scales are also listed — ask your officer before using them.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Taro – Leaf blight management, p. 146

Region

Tamil Nadu

Last updated

2026-11-04

Diseases: biological measures in the source

Powdery mildew: seed treatment with Pseudomonas fluorescens 10 g/kg and sprays of 2 g/l, or NSKE 5% three times at 10-day intervals from the first sign. Wilt: seed treatment with Pseudomonas 10 g/kg and 2.5 kg/ha to the soil. Chemical options for aphids, powdery mildew and grain mould 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)), Coriander – Plant protection, p. 186

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

Weevils, borers and aphids: clean-field measures

Remove dried leaves periodically and keep the plantation clean. Remove side suckers up to the eighth month. Do not dump infested material in the manure pit; uproot infested plants, chop them into pieces and burn them. Trap and kill adult weevils with pseudostem pieces. The banana aphid spreads bunchy top virus.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Banana – Pests (rhizome weevil, stem borer, aphid), p. 11

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

Fruit borer, aphids and nematodes: non-chemical measures

Aphids: release green lacewing larvae (Chrysoperla) at 50 per flowering branch, four times at 10-day intervals from flower initiation. Fruit borer: remove the calyx where possible to discourage egg laying, cover fruits with neem-oil-dipped cloth bags during flowering, spray neem oil 3% or NSKE 5% when butterflies are active, and release Trichogramma chilonis at 1 lakh per acre at the marble stage. Root-knot nematode spreads through infested planting material: use air layers and sterilised or soil-less nursery media.

Source

Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Pomegranate – Pests; nematode management, pp. 37–38

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

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

Avoid planting crossandra in nematode-infested fields. The source lists chemical treatments for aphids, nematodes and wilt. 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)), Crossandra – Plant protection, pp. 254–255

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