Return to the Tomato Pests & Diseases Forum | Post a Follow-Up

 o
Powdery Mildew (I think)

Posted by JLindfors So CA (My Page) on
Tue, Jun 14, 05 at 1:39

I am growing 3 tomato plants in 3 containers; the plants look healthy except for brown leaves on several stems on each plant. I also saw a white powder looking substance on the tops of some leaves that I assumed was powdery mildew. Following a solution I found on the internet, I washed off the plants and then sprayed a solution of baking soda, vegetable oil and castille soap on the tops and bottoms of all the leaves. Is there anything else I should do? Should I cut off and discard any stems with brown leaves with pruning shears?


Follow-Up Postings:

 o
RE: Powdery Mildew (I think)

  • Posted by farkee 10 B South Fl. (My Page) on
    Wed, Jun 15, 05 at 8:47

I would remove any bad stems/leaves and have a plastic bag right in my hand when I did it so they could be disposed of without spreading spores any more than you have to.

Hopefully you have caught it earlier enough and the version of the Cornell Formula (with baking soda + oil) will protect other leaves. I have used Safer's Garden Fungicide with the active ingredient of sulphur on powdery mildew and it was VERY effective. (avail. pre-mixed at Wal-mart, etc). HOWEVER, it is hard to remember that you CAN'T spray sulphur for at least 4 weeks after using an oil spray and vice versa. (see label). Also most anything you use should not be applied in full sun or when the temps. are over 80-85 degrees. Good luck with your tomatoes.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Tomato Pests & Diseases Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here