Pests and diseases

Wilt

ఎండు తెగులు · వడలు తెగులు

Diseases

The advice below comes from each crop's guide — every item shows its source, region and date. It is pending expert review; ask your local officer whether it suits your area.

Red gram

  • Wilt (Fusarium udum)

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

    Pending expert review
    Source
    Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Redgram – Disease management (Wilt), p. 131
    Region
    Tamil Nadu
    Last updated
    2026-11-04

Tomato

  • Damping off and wilt

    Damping off (nursery): treat seeds with Trichoderma asperellum at 4 g/kg or Pseudomonas fluorescens at 10 g/kg 24 hours before sowing, apply P. fluorescens to soil at 2.5 kg/ha with 50 kg of FYM, and avoid water stagnation. Fusarial wilt and root knot nematode: solarize the soil before preparing the nursery bed; use P. fluorescens as seed treatment (10 g/kg), nursery application (20 g/m²), seedling dip (5 g/l) and soil application (2.5 kg with 50 kg FYM per hectare at 30 days after transplanting).

    Pending expert review
    Source
    Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Tomato – Diseases (Damping off; Fusarial wilt & root knot nematode), pp. 61–62
    Region
    Tamil Nadu
    Last updated
    2026-11-04

Bengal gram

  • 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.

    Pending expert review
    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

Coriander

  • 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.

    Pending expert review
    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

Black pepper

  • 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.

    Pending expert review
    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

Banana

  • Nematodes, Panama wilt and Sigatoka: non-chemical measures

    Nematodes: sow sunnhemp on the 45th day and incorporate it a month later; apply pressmud 15 t/ha and neem cake 1.5 t/ha one month after planting; intercrop marigold at 4:1. Pseudomonas fluorescens liquid formulation at 4 l/ha through drip at the 2nd, 4th and 6th month manages Panama wilt and nematodes. Panama wilt: uproot and destroy badly affected plants and apply 1–2 kg lime in the pit. Sigatoka leaf spot: remove affected leaves and burn them.

    Pending expert review
    Source
    Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Banana – Nematode; Panama disease; Sigatoka, pp. 11–12
    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.

    Pending expert review
    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

Crossandra

  • 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.

    Pending expert review
    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

Coconut

  • Rhinoceros beetle and red palm weevil: clean-garden measures

    Rhinoceros beetle: remove and burn dead palms; collect and destroy beetle stages from manure pits whenever manure is lifted; add the fungus Metarhizium anisopliae to manure pits; keep mud pots with castor cake (1 kg in 5 litres of water) to attract and kill adults; hook out adults from the crown at every harvest. Red palm weevil: remove and burn wilting or damaged palms, avoid wounds on the stem and fill stem holes with cement; avoid cutting green leaves, or cut them about 120 cm away from the stem.

    Pending expert review
    Source
    Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Coconut – Pest management (rhinoceros beetle, red palm weevil), pp. 215–218
    Region
    Tamil Nadu
    Last updated
    2026-11-05