Powdery Mildew

recruiterg · May 31, 2009

I have a Summer Wine Ninebark (large flowering shrub) near my tomato patch that has powdery mildew and seems to be killing a section of the plant. Does anyone know an organic (not necessarily organic, but something I can spray that won't harm my tomatoes) method that will stop/kill the powdery mildew.

Amigatec · May 31, 2009

A weak solution of milk and water will work. The bacteria in the milk will take up space on the leaves and not leave any room for the PM to grow. Some Giant Pumpkin growers do this.

garnetmoth · May 31, 2009

If just powdery mildew has been the problem on squash, this has worked for me too! (ie i usually get PM and borers)

Blueaussi · May 31, 2009

A quarter cup of 3% peroxide in a quart of water might work, too. I've not used it, but the hydro folks swear by it.

Mojo · May 31, 2009

Neem oil can inhibit further PM, it also drives off assorted vermin and makes everything smell funky-nice. Plus you can also spray the maters with it and they won't mind one bit.

fourpinkmonkeys · May 31, 2009

I have also read 1 1/2 tbsp baking soda and 1 tbsp veg oil into 1 1/2 galllon of water.

I read this in a book that I have. Make a fresh batch for each needed application.

rsg2001 · June 5, 2009

I've used Serenade - it helped a lot - and would be especially good as a preventive for your tomato plants.

May 31, 2009	#1
recruiterg Tomatovillian™ Join Date: Jan 2009 Location: Edina, MN (Zone 4) Posts: 945	Powdery Mildew I have a Summer Wine Ninebark (large flowering shrub) near my tomato patch that has powdery mildew and seems to be killing a section of the plant. Does anyone know an organic (not necessarily organic, but something I can spray that won't harm my tomatoes) method that will stop/kill the powdery mildew.

May 31, 2009	#2
Amigatec Tomatovillian™ Join Date: Apr 2009 Location: Oklahoma Posts: 208	A weak solution of milk and water will work. The bacteria in the milk will take up space on the leaves and not leave any room for the PM to grow. Some Giant Pumpkin growers do this. Last edited by Amigatec; May 31, 2009 at 10:21 AM.

May 31, 2009	#5
Mojo Tomatovillian™ Join Date: Mar 2008 Location: Houston, TX Posts: 317	Neem oil can inhibit further PM, it also drives off assorted vermin and makes everything smell funky-nice. Plus you can also spray the maters with it and they won't mind one bit. __________________ There is no logical response to the question, "Why won't you let me plant more tomatoes?"

May 31, 2009	#3
garnetmoth Tomatovillian™ Join Date: Feb 2006 Location: cincinnati, oh Posts: 492	If just powdery mildew has been the problem on squash, this has worked for me too! (ie i usually get PM and borers)

May 31, 2009	#4
Blueaussi Tomatovillian™ Join Date: Apr 2009 Location: South Carolina Zone 8a Posts: 1,205	A quarter cup of 3% peroxide in a quart of water might work, too. I've not used it, but the hydro folks swear by it.

May 31, 2009	#6
fourpinkmonkeys Tomatovillian™ Join Date: Mar 2009 Location: PA Posts: 9	I have also read 1 1/2 tbsp baking soda and 1 tbsp veg oil into 1 1/2 galllon of water. I read this in a book that I have. Make a fresh batch for each needed application.

June 5, 2009	#7
rsg2001 Tomatovillian™ Join Date: Jun 2006 Location: New York Zone 6 Posts: 479	I've used Serenade - it helped a lot - and would be especially good as a preventive for your tomato plants.