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 Post subject: Powdery Mildew
PostPosted: Fri Apr 25, 2003 8:45 am 
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Location: Houston, TX
I'm getting powdery mildew on my crepe myrtles. I have heard that baking soda & water is a preventative for this - will it clear up the mildew that's already there? It wouldn't be practical to try and remove the affected leaves, the tree is too big.

Also there are small grayish spots on my zucchini squash. They appear to be similar to powdery mildew but don't rub off as easily with your fingers. Is this a symptom of some other problem?


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 Post subject: Powdery Mildew
PostPosted: Fri Apr 25, 2003 11:51 am 
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You could apply horticultural cornmeal to the soil around the area at 2 or 3 pounds per 100 square feet. It is not good to remove the leaves, as they gather light for the tree. Photosynthesis is necessary for a tree to live. You should also spray the leaves with seaweed (like Maxicrop) and potassium bicarbonate.

The cornmeal should work well for your squash problem as well.

Happy gardening!

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 Post subject: fungus
PostPosted: Tue May 20, 2003 10:28 pm 
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Location: Prosper, TX
You can use baking soda, but it will leave sodium behind. The end result is you will tie up nutrients to the plant. Try using Remedy, potassium bicarbonate, to treat instead. It will take 2-3 applications to clear it up. You might also want to add Hasta gro from Medina for a foliar feed. Mix them together to feed and fight the fungus at the same time. I see your from NW Houston. You can find these products at Lowe's in Tomball and Willowbrook. Happy gardening. :D


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 Post subject: Re: Powdery Mildew
PostPosted: Fri Jun 06, 2003 9:46 am 
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organic1 wrote:
You could apply horticultural cornmeal to the soil around the area at 2 or 3 pounds per 100 square feet. It is not good to remove the leaves, as they gather light for the tree. Photosynthesis is necessary for a tree to live. You should also spray the leaves with seaweed (like Maxicrop) and potassium bicarbonate.

The cornmeal should work well for your squash problem as well.

Happy gardening!


If I understand this right, if I put horticultural cornmeal around the Crepe Myrtle, and not spray, this will take care of the powdery mildew?


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 Post subject:
PostPosted: Fri Jun 06, 2003 8:06 pm 
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Location: Richardson,TX
Household vinegar (5%) sprayed on the mildew will control it.


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 Post subject:
PostPosted: Fri Jun 06, 2003 9:54 pm 
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Whoa! :shock:

Full strength household vinegar foliar spray will kill many plants. Test on a few leaves before spraying the entire tree. Or try diluting it.

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 Post subject: Re: Powdery Mildew
PostPosted: Sat Jun 07, 2003 8:23 am 
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Lou wrote:
organic1 wrote:
You could apply horticultural cornmeal to the soil around the area at 2 or 3 pounds per 100 square feet. It is not good to remove the leaves, as they gather light for the tree. Photosynthesis is necessary for a tree to live. You should also spray the leaves with seaweed (like Maxicrop) and potassium bicarbonate.

The cornmeal should work well for your squash problem as well.

Happy gardening!


If I understand this right, if I put horticultural cornmeal around the Crepe Myrtle, and not spray, this will take care of the powdery mildew?


It would be best to spray in addition to the cornmeal application.

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The Laws of Ecology:
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 Post subject: Re: Powdery Mildew
PostPosted: Mon Jun 09, 2003 3:57 pm 
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organic1 wrote:
Lou wrote:
organic1 wrote:
You could apply horticultural cornmeal to the soil around the area at 2 or 3 pounds per 100 square feet. It is not good to remove the leaves, as they gather light for the tree. Photosynthesis is necessary for a tree to live. You should also spray the leaves with seaweed (like Maxicrop) and potassium bicarbonate.

The cornmeal should work well for your squash problem as well.

Happy gardening!


If I understand this right, if I put horticultural cornmeal around the Crepe Myrtle, and not spray, this will take care of the powdery mildew?


It would be best to spray in addition to the cornmeal application.



Ok...I'll spray...but to help in the future, will applying the cornmeal around the bottom of my crepe myrtle keep it from getting the mildew in the future?


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 Post subject:
PostPosted: Wed Jun 11, 2003 12:33 pm 
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It sure would not hurt anything. I hesitate to say it will eradicate the problem completely because of various other external forces which could occur.

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