Powdery Mildew

Watch out for powdery mildew on squash and zucchini plants. Spots of white fuzzy are indicators; dying / wilting leaves mean it's spreading. To counteract:

  • if leaf is wilting, cut it off at the vine and put in the green bins (not the compost - don't want to spread it to next year's plants)
  • if only some spots, spray every 2-3 days with a mixture of one part milk and 9 parts water. This seems to change the pH of the leaf so the mildew can't grow

If you leave you plant alone, it will die - so keep a watchful eye, especially when it is hot and humid.