Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Neem (preparation & use) (402)

Click/tap on images to enlarge
  • Worldwide. South and Southeast Asia, Africa, South and Central America, the Caribbean, Oceania. In Australia, Fiji, Solomon Islands, and many other Pacific island countries.
  • Fast growing evergreen tree, 20 m high, mahogany family, long flexible leaves with 20-30 paired leaflets; fruits oval, yellow when ripe, 3 cm long.
  • Used as pesticide against moths, aphids, leaf and plant hoppers, leaf miners, grasshoppers, scale insects, whiteflies and nematodes.
  • Spray in evening to avoid leaf burn and destruction by sunlight.
  • Use fresh:
    • 1 kg/5 litre water, soak overnight (preferably pound first, or after soaking).
    • Squeeze leaves, strain, add about 20 g soap, and use.
  • Use dried:
    • Collect leaves, dry and store.
    • Add 250 g/5 litre water, soak overnight, pound, soak again overnight.
    • Squeeze, strain, add about 20 g soap, and use.
  • Use seeds:
    • Select yellow fruit, dry 3-4 days in the sun.
    • Pound to remove seed, winnow; pound seeds to fine powder.
    • Add 250g/5 litre water, mix, soak 24 hours.
    • Strain, add 20 g soap, and use.
Common Name


Scientific Name

Azadirachta indica

 AUTHOR Grahame Jackson & Kazuko Ota
Information from Azadirachta indicata (Neem) Bio-NET-EAFRINET. (; and Azadirachta indica Wikipedia. (; and from Campos EVR (2016) Neem oil and crop protection: from now to the future. Froniersin Plant Science. ( Photo 3 JM Garg Azadirachta indica in Hyderabad, India.

Produced with support from the Australian Centre for International Agricultural Research under project HORT/2016/185: Responding to emerging pest and disease threats to horticulture in the Pacific islands, implemented by the University of Queensland and the Secretariat of the Pacific Community.

Copyright © 2022. All rights reserved.