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Jun 16, 2011 12:11 PM

Damage to pumpkin plant/vine...maybe ozone damage?

Has anyone ever experienced ozone damage to their pumpkin plant/vine? I have one vine that has white damage of some sort. It doesn't look like mildew. It looks like white marks that are webbing throughout the leafs. I have sprayed it with baking soda/H20 mixture but that hasn't seem to make any difference. There is not much information on the internet about ozone damage and what it looks like on pumpkin plants, but from what little info I have found, it sounds like that might be my issue. I have attached a picture (hopefully it attaches successfully!). Can anyone help me diagnose this issue? And should I cut the vine immediately? I would really hate to do that because there are a few pumpkins on this vine that look good, but I would also hate for it to damage other vines, plants, or sections of my garden.


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  1. I wouldn't worry about it. I get a similar pattern on my squash and zucchini. It's not powdery mildew. I believe this is just a charateristic trait of the plant. It shouldn't stunt any of your harvests.

    I did the same thing when I first noticed the silvery vein patterns a few years back and sprayed the plants daily with fungal spray and didn't notice any less markings, so I let it go. Turned out to be my most productive plant the whole season and was the last to be pulled.

    1 Reply
    1. re: Novelli

      Thanks Novelli! I am also noticing that this is my most productive plant out of the bunch as well, so maybe it is a good sign ;-). I will stop stressing about it and worry more about keeping my prized pumpkin healthy...hehehe