Guava — 6Pests & diseases

• Pests and nematodes: non-chemical measures

  Mealybug: release Cryptolaemus predatory beetles at 10 per tree. Fruit fly: collect and destroy fallen fruits and install methyl eugenol traps at 4 per acre. Neem oil 3% is listed against tea mosquito bug and fruit fly. Root-knot nematode spreads through infested planting material: use air layers and sterilised or soil-less media (vermiculite, coir pith) in the nursery, grow marigold around the basin, and apply Purpureocillium lilacinum 60 g with 5 kg FYM and 250 g neem cake per tree once in three months.

  Pending expert review

  Source

  Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Guava – Plant protection (pests, nematodes), p. 29

  Region

  Tamil Nadu

  Last updated

  2026-11-04

• 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.

  Pending expert review

  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