Pests and diseases

White grub

Root grub · వేరు పురుగు · తెల్ల పురుగు

Insects and mites

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.

Groundnut

  • 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.

    Pending expert review
    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

Onion

  • Pests and diseases: ask before you spray

    The source lists chemical sprays for thrips, root grub, nematodes and leaf spot / purple blotch. 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)), Big onion – Plant protection, pp. 151–152
    Region
    Tamil Nadu
    Last updated
    2026-11-04

French bean

  • 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.

    Pending expert review
    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

Rose

  • 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.

    Pending expert review
    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.

    Pending expert review
    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