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Powder Mildew in Compost?
4 posters
Page 1 of 1
Powder Mildew in Compost?
I'll be trimming a copperleaf hedge that has PM. The compost process should kill the PM spores... right? Would you compost the clippings or trash them?
The neem treatment last weekend did a great job at killing the PM back, but now it's coming back.
The neem treatment last weekend did a great job at killing the PM back, but now it's coming back.
dstack- Posts : 661
Join date : 2013-08-20
Age : 55
Location : South Florida (Ft. Lauderdale), Zone 10A
Re: Powder Mildew in Compost?
Burn the PM leaves or place them in the trash, not the cold compost pile. If you plan on doing hot composting, some folks say placing the affected leaves in this heap is acceptable.
http://www.organicgardening.com/learn-and-grow/powdery-mildew
See previous threads about this subject.
https://squarefoot.forumotion.com/t16435-safe-to-compost-powdery-mildew-leaves
http://www.organicgardening.com/learn-and-grow/powdery-mildew
See previous threads about this subject.
https://squarefoot.forumotion.com/t16435-safe-to-compost-powdery-mildew-leaves
43 years a gardener and going strong with SFG.
https://squarefoot.forumotion.com/t3574-the-end-of-july-7-weeks-until-frost
There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau
https://squarefoot.forumotion.com/t1306-other-gardening-books
Re: Powder Mildew in Compost?
That's what I would think. My compost is hot, and I'm in need of more greens in it if I'm going to keep it hot. So, I'll chance it. At least I have plenty of Neem if and when the spores spark an infection.camprn wrote:Burn the PM leaves or place them in the trash, not the cold compost pile. If you plan on doing hot composting, some folks say placing the affected leaves in this heap is acceptable.
http://www.organicgardening.com/learn-and-grow/powdery-mildew
See previous threads about this subject.
https://squarefoot.forumotion.com/t16435-safe-to-compost-powdery-mildew-leaves
dstack- Posts : 661
Join date : 2013-08-20
Age : 55
Location : South Florida (Ft. Lauderdale), Zone 10A
Re: Powder Mildew in Compost?
Because of the location of your garden in Florida, conditions are often ideal for PM infection. Prevention is a good thing to consider. By choosing PM resistant varieties and prophylactic treatment of susceptible plants you will be able to reduce the occurrences of PM, but you will not eliminate them.
43 years a gardener and going strong with SFG.
https://squarefoot.forumotion.com/t3574-the-end-of-july-7-weeks-until-frost
There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau
https://squarefoot.forumotion.com/t1306-other-gardening-books
Re: Powder Mildew in Compost?
Yes, both my Marketmore cuke and Dunja zuke varieties are PM resistant, and I chose them because of those prime PM conditions here.
dstack- Posts : 661
Join date : 2013-08-20
Age : 55
Location : South Florida (Ft. Lauderdale), Zone 10A
Re: Powder Mildew in Compost?
My personal choice is not to include anything at all that is diseased. There are just too many variables that can impact whether or not the spores would die off and not enough reward for including the extra greens in my mix. It's just not that hard to find good supplies and a LOT more work to combat infection when it occurs.
If you decide to do it, you might want to lay out the compost and cover it with black plastic in the sun for several days to solarize it (raise the temps to 160 degrees or so)
If you decide to do it, you might want to lay out the compost and cover it with black plastic in the sun for several days to solarize it (raise the temps to 160 degrees or so)
Re: Powder Mildew in Compost?
Thanks , but the deed is done. I cut it up and mixed it into my black hot box.I'll have to trust the hot compost process to take care of it. And like I said, I use PM resistant varieties. I appreciate the feedback.
dstack- Posts : 661
Join date : 2013-08-20
Age : 55
Location : South Florida (Ft. Lauderdale), Zone 10A
Re: Powder Mildew in Compost?
Is everything you intend to put the compost on resistant? Will you ever rotate crops in that might not be resistant?
When I think resistant with plants, I think of "water resistant." Which often means less that we wish it would.
When I think resistant with plants, I think of "water resistant." Which often means less that we wish it would.
Marc Iverson- Posts : 3637
Join date : 2013-07-05
Age : 63
Location : SW Oregon
Re: Powder Mildew in Compost?
Yes. Also, here in Florida we basically have PM spores in the air everywhere and all the time. Thank goodness Neem oil works well. And my cheyenne pepper/garlic spray helps too because of the garlic anti-fungal properties. In my fresh batch that I started tonight I added Tabasco sauce and olive oil. This is mainly to repel bugs.Marc Iverson wrote:Is everything you intend to put the compost on resistant? Will you ever rotate crops in that might not be resistant?
When I think resistant with plants, I think of "water resistant." Which often means less that we wish it would.
dstack- Posts : 661
Join date : 2013-08-20
Age : 55
Location : South Florida (Ft. Lauderdale), Zone 10A
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