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Why are my tomatoes yellow/zucchini covered in white stuff? HELP!

Why are my tomatoes yellow/zucchini covered in white stuff? HELP!
Posted by Melissa from Southern Califo on 2008-07-22 10:00:00

A little over a week ago I noticed my zucchini plants had white stuff one the leaves (not fluffy but really on there). Then my tomato plants started to turn yellow and in some spots brown and curl. Does anyone know what this is? Pest? Illness?

The ground is usually moist but not completely soaked so I don't think it's the watering.

If you have time can you look at pictures of my problem linked below?




  • zucchini
    Posted by garden girl RI from RI on 2008-08-07 10:11:00

    It looks alot like powdery mildew on your zucchini. There are many different treatments for this condition (VERY common in squash varieties) & there are different recourses one can take. I would suggest an organic approach. One recipe I use is: 1 qt water, 1 Tbl baking soda, 1 Tbl veg oil, few drops natural dish soap. Spray on the leaves (top & bottom) early in the day- so the leaves will be dry prior to the high heat of the mid-day sun. This mixture will also kill some soft-bodied pests if you have them. I hope this helps. Good luck!


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