Natural pest control – home made remedies

As a follow-up to our last weeks workshop on natural pest control the recipes are posted here:

In cold water for 12-24 hours

  • Garlic: slugs, mildew, carrot fly, aphids
  • Hot pepper: slugs, onion fly
  • Chives: carrot fly
  • Stinging nettle: aphids
  • Compost

Like a tea, pour boiling water over plant parts
200 g (2 kg fresh) with 10 l of boiling water, let infuse for 1 h, 10-20 % diluted

  • Basil tea: 8 tsp dry basil with 1 l of boiling water, against aphids and spider mites on leaf plants
  • Onion (-peel), garlic, chives, horseradish, nasturtium, achillea, birch leaves: against fungi
  • Wormwood, mugwort, tansy, thyme, hyssop, sage, lavender, lovage: pest repellent

200 g (2 kg fresh) in 10 l of water, boiling for 30-60 minutes, 10-30 % diluted

  • Rhubarb leaves: against sucking and biting insects, e. g. aphids
  • Common horsetail: against fungi, e. g. bean rust

Dissolve in water

  • Baking soda: fungi (e. g. mildew), 50 ml baking soda in 4 l water plus 50 ml of dish soap
  • Soap: soft skinned bugs (aphids)

Liquid manure
200 g dried or 2 kg fresh with 10 l of water, fermentation for 10-21 days, strain and ferment another 3-8 days

  • Stinging nettle + comfrey
  • Weeds: couch grass, thistle, ground elder, bindweed (morning glory), gallant soldier (potatoe weed), common chickweed, common knotgrass, plantain, chamomile: to strengthen plants, weeds contain auxins, vitamins, enzymes and phenols
  • Oak: bark or leaves
  • Calendula
  • Herbs: their essential oils protect and strengthen plants

Against sucking and biting insects:

  • Rhubarb leaves, staghorn sumac, nasturtium, wood fern, eagle fern
  • Walnut, oak, horse chestnut (conker tree)

Diatomaceous earth

  • used as powder against cucumber beetle, cabbage white caterpillar, slugs, flea beetle, …


  • Collect (kill)
  • eggshells or sand
  • beer trap (attracts more slugs)
  • wooden board (they will hide under during the day and are easier to collect)
  • work the soil surface to dry quicker
  • avoid mulching (moist soil)
  • strips of dry soil all around the garden
  • don’t provide hiding spots
  • till the soil in fall after the first frost to destroy eggs


  • Net, cage (chicken wire)
  • Don’t attract them (garbage, bird feeder)
  • Lead them to other spots:  water, fodder
  • Have your cat or dog in the garden
  • What does not work: hair or urine of carnivores


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