Tomatoville® Gardening Forums


Notices

Information and discussion regarding garden diseases, insects and other unwelcome critters.

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old June 1, 2023   #1
paradajky
Tomatovillian™
 
Join Date: May 2021
Location: Coastal Southern CA
Posts: 164
Default PM/fungus contradictory applications

Hi:

I read somewhere last year about contradictory applications when treating powdery mildew, and can't seem to find the information. I think it was something like don't use bleach or copper at least a week after using an oil-based treatment (e.g. neem or horticultural), or vice-versa. Spent a bit searching having trouble finding it again. Anyone know about this?

Background:
Here in coastal southern california it's been overcast and damp since mid april, with only a day or two of sunshine. We've even had some rain. Full on May Gray, now heading into June Gloom.

I got a late start on my tomato seeds just like last year, having sowed them about 6 weeks ago (mid-late April). They are outside and I've already pinched off a few leaves that had powdery mildew on them. I will be transplanting them to final growth spot this weekend. Squash okay so far. Something ate the cucumbers boooo. I sprayed the seedlings a few days ago with peroxide, it rained the next day, and I sprayed again with copper after the rains. Leaves look a little damaged but plants appear all right so far.

PM was one of the major diseases that took my tomatoes out last year after a very short harvest, despite good weather and weekly, alternating applications of 1.5% hydrogen peroxide and neem oil. For sure took out my cucumbers and squash, having only one short harvest. This year I'm trying copper and peroxide. I might put bleach in the rotation, or maybe consider the biofungicide method. I read through the entire bleach thread last year and maybe that's where I read about the contradictory application.

Thank you for your time!
paradajky is offline   Reply With Quote
 


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 04:36 PM.


★ Tomatoville® is a registered trademark of Commerce Holdings, LLC ★ All Content ©2022 Commerce Holdings, LLC ★