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Bungala Ridge Permaculture Gardens


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Permaculture Techniques - Biological Control

Natural Pest Controllers


Combines the practices of species diversity, companion planting, hygienic practice, organic gardening, interplanting and crop rotation, predacious insects and birds, with using specific resistant plant species and cultivars, antagonistic organisms, and site adapted species, to obtain a healthy system.


  • No residues of harmful synthetic chemicals.
  • No use of toxic chemicals (encouraging safe practices and discouraging the manufacture of toxic chemicals, reducing pollution).
  • Strong, healthy growth of plants with increased yields.
  • Decrease in plant susceptibility to diseases or pests.
  • Increase in resistant and hardy strains of plants, genetic strength.
  • General improvement in soil "health" (promotes increase in beneficial soil organisms).
  • Encourages diversity.
  • Cost savings.


  • Consider prevention of problems first by understanding the nature of the plants in the system and by correct siting of plants.
  • Discuss with local gardeners to discover prevalent problems and possible workable solutions.
  • Use a quarantine area when introducing materials (including plants) into the system.
  • Check for signs of disease, pests, etc.
  • Where problems persist after employing techniques such as companion planting, crop rotation, and hygienic practice, try introducing "soft" methods of control - attracting birds and predatory insects, accepted organic dusts or sprays (for prevention or control).
  • Physical removal of pest or infected material.
  • Use of traps for pests.
  • Decrease causes of plant stress - lack of water, light, nutrients, shelter, soil micro-organisms, thus making them more resistant to pests and disease.
  • For really persistent problems employ bug juice, proprietary organic sprays, home made organic pesticide concoctions, introduction of specific antagonistic organisms (eg Dipel).
  • Research similar approaches to animal husbandry and apply.

Natural Pest Controllers

Nature has its own ways of keeping pests and diseases down to reasonable levels. Simply put, diseases and pests also have pests and diseases too, which keep their numbers down. All we need to do is to help these natural controllers in their work. One way of doing this is to grow flowers to provide pollen and nectar for beneficial, pest and disease eating, insects, such as hoverflies and lacewings.There's a whole list of easy-to-grow annuals which both you, and the beneficial insects, can enjoy. Grow them all over the garden or allotment - to help keep flowers, fruit and vegetables healthy. Sow some today!

  • Poached Egg Plant
  • Buckwheat Fagopyron esculentum
  • Californian poppy Eschscholtzia californica
  • Candytuft Iberis amara
  • Convolvulus, annual Convolvulus tricolor
  • Corn chamomile Anthemis arvensis
  • Corn marigold Chrysanthemum segetum
  • Cornflower Centaurea cyanus
  • Dill Anethum graveolens
  • Sunflower
  • French marigold Tagetes patula; Tagetes signata
  • Golden marguerite Anthemis tinctoria
  • Nemophila Nemophila spp
  • Phacelia Phacelia tanacetifolia
  • Poached egg plant Limnanthes douglassi
  • Pot marigold Calendula officinalis
  • Sunflower Helianthus annuus
  • Sweet alyssum Lobularia maritima




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Our ever-changing view!
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permaculture ethics
care for earth,
care for people,
return surplus,
reduce consumption

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Copyright © Beverley Paine 2002-14. Article from this website may be downloaded, reproduced, and distributed without permission as long as each copy includes this entire notice along with citation information (i.e., name of the periodical in which it originally appeared, date of publication, and author's name). Permission must be obtained from the author in order to reprint this article in a published work or to offer it for sale in any form. Please visit Bungala Ridge Permaculture Gardens for more original content by Beverley Paine.