Asked on May 4, 2017

White flies are ruining my gardenia bushes!

Mary13526476Janet Pizaro


Every spring they are over run with white flies and then the leaves have that thick
black coating on all the leaves. What can I do to prevent this or treat this. I have tried numerous online remedies, but I can not get the black off the leaves and eventually the bushes look awful. New growth does come in, but the inner leave always remain covered with black.
5 answers
  • Gma Kirk
    on May 4, 2017

    You can make your own insecticidal soap spray by mixing 1 cup of vegetable oil with 1 tablespoon of dishwashing liquid, shake well. Add 1-2 tsp of this to a cup of water, shake well and use this to spray your plants. You'll have to shake it ever so often while using it because it will separate. You can also introduce beneficial insects like green lacewing or use sticky traps. Good luck!
  • Janet Pizaro
    on May 4, 2017

    Black sound like a fungus of sort. Remove the infected leaves. Apply a systemic fungicide .Repeatly spray the bushes with a horticultural soap for insects.
  • Mary
    on May 4, 2017

    Thanks....literature says it is not a fungus just secretions from the white flies. Our whole neighborhood will have millions of these white flies.
  • 13526476
    on May 5, 2017

    Sounds like you need an army of beneficial insects, ladybugs, lacewings, praying mantis, nematodes.
  • Mary
    on May 5, 2017

    Guess I will look into getting some. Thanks.

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