How the humble marigold outsmarts a devastating tomato pest

Discussion in 'Plants: In the News' started by Junglekeeper, Mar 1, 2019.

  1. Junglekeeper

    Junglekeeper Esteemed Contributor 10 Years

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  2. Margot

    Margot Generous Contributor 10 Years

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    I'm not surprised . . . I'm also repelled by marigolds. (What a snob!)
     
  3. wcutler

    wcutler Esteemed Contributor Forums Moderator VCBF Cherry Scout 10 Years

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    It sounds like you're saying you don't like the way they look. I don't like the way they smell, and that's not being snobby, but it seems it's not being smart. Natural insect repellents are surely a good thing.
     
  4. Margot

    Margot Generous Contributor 10 Years

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    You're right . . . if tomato whiteflies were a problem in my garden, I might embrace marigolds - unless I could find an alternative control such as a spray containing limonene that is. It seems that a citrus extract containing limonene was formulated in 1998 to combat mealybugs and scale insects but I can't tell if there is a product on the market today that has limonene as an ingredient. Limonene, a citrus extract, for control of mealybugs and scale insects. - PubMed - NCBI

    Further research into ways to control white fly led me to this website: How to Control Whiteflies | Planet Natural which lists a number of ideas. I'm puzzled why #9 says, "Fast-acting botanical insecticides should be used as a last resort . . . " since this would probably include the chemical in marigolds - limonene. Given the research shared by Junglekeeper, marigolds themselves ought to be mentioned on this and other lists - cheap, safe and effective.
     

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