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Ca

I went to the nursery looking for the least toxic treatment for PM, and found Safer (brand) fungicide (32oz liquid already mixed),specifically listed for powdery mildew, active ingredient is 0.40% sulfur ($9.95/32oz). Then, looking for a cheaper alternative, I found a bag of wettable sulfur, but the label said "do not use on curcubits". What gives?
Nursery salesman gave me a recipe using horticultural oil mixed with baking soda. Does this work, or is it wishful thinking?

8/3/2005 6:08:44 PM

Commack, NY

if you mix up a batch of sulphur and spray it on your plants in a liquid form it WILL stunt the fruit growth. i went from 32 lbs a day one year to 17 the next day. took a few days to get back up in the mid 20's.

8/3/2005 8:21:29 PM

Acampo Ca.

Around here, we dust wine grapes with sulfer for mildew with no adverse effect to the grapes. Just thought you might like to know.

8/3/2005 8:27:06 PM

Ctpumpkin@optonline.net

Oil & Baking Soda for Cucurbits. Sulfur for Grapes.

8/3/2005 10:33:20 PM

Halifax, Nova Scotia

OK, so the sulphur will now be launched out into the woods and I'll stop bragging about not having any PM so far this year. Can someone give me some measurements for baking soda and oil to water for application through a regular garden sprayer?

8/4/2005 1:32:06 PM

Ca

The recipe I have is 2tablespoons Ultra Fine Horticultural Oil (I got SunSpray Ultra-Fine Year-Round Pesticial Oil, which is 98% parrafinic oil), 2 teaspooons baking soda, in one gallon of water. "Coat thorougly tops and undersides of leaves till leaves drip. Repeat 7-10 days later and then only as needed. Some horticultural oils are packaged differently, with maybe 10% oil by volume, I don't know how this affects the formulation, or if you are supposed to dilute this already diluted amount.

8/4/2005 1:50:13 PM

Ctpumpkin@optonline.net

Make sure it is a Superior Summer Horticulture Oil & not a dormant oil. The rate of the oil is 1% (1.28 oz per gallon) to the advised 2 tsp quantity of baking soda or Armicarb (same thing).

8/4/2005 9:46:29 PM

Owensboro, Ky.

Tremor, what is Neem Oil? Dormant or Superior? I hope this doesn't sound smart-allecky...is that a word?... Nu-B trying to learn. Thanks for all your help. Peace Wayne

8/4/2005 11:40:38 PM

Ctpumpkin@optonline.net

Neem oil is a botanical oil extracted from the seed of the Neem Tree. It is both insetcicidal & fungicidial in nature.

Horticulture Oil is a highly refine petroleum based oil.

Here is a link you might find useful:

http://www.ext.colostate.edu/pubs/insect/05569.html

Steve

8/5/2005 5:04:30 AM

Midway City, California

My Book Say's 4 tbsp of Baking soda, 2 tbsp of Murphy's oil soap, 1 gal warm water, Mix all ingredients together. Then pour the solution into a hand held mist sprayer and throughly douse your plants when you see the tale sighs of mildew.

8/5/2005 3:10:14 PM

Mill Bay, British Columbia

What does the sulphur do to the plant to alter fruit growth?

Thanks/Glenn

8/17/2005 10:20:01 PM

Switzerland, FL

I read in Smithsonian Magazine article on giant pumpkins about a horticulture oil made of baking soda and Joy dishwash liquid. Does anyone have a recipe for this? It sure would be a lot cheaper than the Neem oil I've been using.

10/15/2011 11:52:21 AM