Whitefly - help please

Discussion in 'Gardening & Plant Propagation' started by fishax, May 19, 2006.

  1. fishax

    fishax Member

    Messages:
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    Jan 16, 2006
    We have plastic green houses with good ventilation but every summer are invaded by swarms of whitefly - have tried sticky strips (caught every airbourn insect except whitefly) and chemical warfare - does anyone have any suggestions please? We choke on the blihgters when harvesting produce.

    New Zealand west coat - max temp 25C and min 0 with occasional frost.
     
  2. culpeper

    culpeper Well-Known Member

    Messages:
    3,187
    Joined:
    Nov 1, 2002
    Location:
    Australia
    BASIL SPRAY:
    Pour 1 litre of boiling water over 2 firmly packed cupfuls of basil leaves. Leave to get cold, strain. Use within a few days. Basil spray will deter and sometimes kill aphids, woolly aphids, flies, fruit flies, leaf-miners, mosquitoes, scale, spider mites, thrips, whitefly, bugs, caterpillars, earwigs, millipedes, beetles, slaters, spiders and weevils.

    PYRETHRUM SPRAY:
    The concentration of pyrethrums is at its peak when the flowers are in full bloom, from the time the first row of florets open on the central disk opens to the time all the florets are open. Add 1 litre of boiling water to half a cup of firmly packed flowers. Leave to cool, strain and add 1 teaspoon of pure soap. Shake well before use. Spray only in early morning or evening when bees are not active, and never in temperatures more than 32C. You will need to use the spray or dust every day until the infestation is over. It deteriorates in sunlight. The spray is useful against aphids, woolly aphids, scale, spider mites, thrips, whitefly, codling moth, cabbage loopers, caterpillars, earwigs, leaf-miners, millipedes, some beetles, spiders, termites and slaters, spiders, termites, weevils, grasshoppers, stink bugs, thrips, gnats, mosquitoes, tomato pinworms, spider mites and crickets. In the house, the spray will eradicate fleas and spiders. Combine with soap to kill lice (test for skin sensitivity first.) The spray may stain some fabrics. Dried pyrethrum flowers can be ground to a powder and used as a dust.

    RHUBARB SPRAY:
    Chop 1 1/2 kg rhubarb leaves, simmer in 3 1/2 litres water for half an hour. Grate 1/2 cake of pure soap into 5 litres of boiling water, stir and dissolve. When cool, mix with the rhubarb. Strain and bottle, then store in the fridge. Will kill aphids, woolly aphids, bugs, caterpillars, whitefly, mildew and leaf-miner adults.
    OR
    Pour 1 litre of boiling water over about 10 large, chopped rhubarb leaves, cover and allow to cool. Strain, dilute with 1 litre of water before use and use within a few days.

    TOMATO LEAF SPRAY:
    Soak 1-2 cups of chopped or mashed tomato leaves in 2 cups of water overnight. Strain through cheesecloth or fine mesh, add about 2 more cups of water to the strained liquid, and spray. Use for aphids and corn earworm (also known as tomato fruitworm), mites, white cabbage butterfly caterpillars and whitefly. It is also a useful fungicide, but do not use it on capsicum or potatoes (which are closely related to tomatoes.) Hang bunches of tomato leaves in fruit trees to keep insect pests away.
     

  3. fishax

    fishax Member

    Messages:
    20
    Joined:
    Jan 16, 2006
    Wow - will give some of these a try next summer - thanks alot