Q & A

Welcome to the Planet Natural Garden Forum! Whether you’re new to gardening or have been at it for some time, here you can search existing messages for answers to your questions or post a new message for others to reply to. If this is your first visit, please read over our forum instructions carefully before posting. Enjoy!

  • What’s attacking my squash plants?

    Created by Deborah Hart on

    Please help!

    I have planted a large patch of Red Kuri squash plants that are having problems with what I think is stem/ crown rot disease. It looks set to destroy about half my crop this season. My plants appeared to be healthy a week ago, then I noticed some plants with leaf wilt, and then they just die a day later. On inspection I cannot find any evidence of insects or vine borer, hence I think it might be fungal.

    What product would you recommend to protect the remaining healthy squash plants? I have sprayed bicarb soda around the base of the plant but think I may need to call in the big guns on this one!

  • Author
  • #259351

    Eric Vinje

    Hi Deborah –

    Various fungal diseases and blights attack squash foliage. From your description, I have come up with a couple possible plant problems and listed symptoms and treatments for each.

    Fusarium Crown and Foot Rot

    • Wilting of leaves
    • Plant dies within a few days
    • Dead tissue of the crown and upper taproot
    • Infected plants break off below the soil line

    • Purchase pathogen free seed
    • Rotate crops on a 3 to 4-year rotation
    • Don’t plant melons following a barley crop
    • If the disease persists, it is best to remove infected plant debris and solarize the soil before planting again

    Bacterial Wilt

    • Severe wilting, especially during the heat of the day
    • Symptoms appear at all stages of plant development
    • Leaves may yellow
    • Dead tissue may appear around leaf margins
    • Plants die within two weeks

    • There is no control for bacterial wilt once plants become infected
    • Plant resistant varieties when available
    • Use an organic insecticide to control cucumber beetles, which are known to spread the disease.

    Various fungus and blights attack squash plants. In most cases, a dilute solution of copper spray will help control the problem. However, we do not offer a product that will work on the two conditions mentioned above.

    Hope it helps!

You must be logged in to reply to this topic.