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hamilton,Ontario

Ive been so buzy worryin about the svb's that i kinda let the white spots on the leaves take over...well now some of the leaves are white.Im sure this is the powdery mildew I hear but never experienced due to pumpkin dying off so quick..I can rub it off wwith my hand being careful with the leaves of course. What can I use in canada to clear this up and how worried should I be worried about this????

8/9/2006 6:11:35 PM

Ga.

Its a killer.It will take your whole plant out..Not sure what you have up there for pm...Good Luck..

8/9/2006 8:00:25 PM

Abbotsford, B.C

From my experience, once you've got powdery mildew, it's really really hard to make it go away. At best, you could keep it at bay so that it spreads as little as possible. However, I am not overly knowledgeable on the various products available in Canada here to treat severe cases of the powder. Can any other Canadian growers chime in here? NorthShoreBoyz, do you know of any products in the Lower Mainland that have worked well for you?

Good luck saving your plant, Eng.

Cameron

8/9/2006 8:40:26 PM

hamilton,Ontario

the funny thing is I can wife it off with effort...but I cant see saving all the leaves and getting out the SOS pads..LOLOL....any help will be appreciated...some of the newer leaves are ok but I can see its spreading for sure.....

8/9/2006 8:55:41 PM

[email protected]

The #1 Powdery Mildew eradicant fungicide is Myclobutanil...sold as Nova, Eagle (Pro) & Immunox (retail) here in the US.

Baking Soda & Stylet Oil will control it too.

8/9/2006 10:01:01 PM

Ontario

I did the milk thing as a experiment and it erradicates most of it. 1 part milk to 10 parts water. Tryed neem oil on a few spots tonight and will see how that works. Thanks to Steve, I only have a few spots of powdery mildew under the tent, great schedule thanks a million steve. Usually this time of year I am battling powdery mildew like crazy.

drew

8/9/2006 10:39:15 PM

San Jose [email protected]

neem oil works, use twice a week, add two tbsp of baking soda per gallon, the secret is getting under the leaves, one of the fogger machines would be the best, you can make your own with a "leaf blower" and a pump sprayer, (look at docgipe, last year diary) it will take some inginuity. Wear a resperator when using a fogger

8/10/2006 12:21:50 AM

Netherlands

Like Drew I experimented with milk as well. Four plants without milk and one sprayed each week with milk (top and bottom of leaves). The four not sprayed now have PM the one sprayed, not a trace. This was of course preventive spraying.

8/10/2006 2:37:26 AM

Montoursville, PA

Neem Oil is an insecticide, fungicide and mitecide. Use with two tablespoons of baking soda per gallon. It will control and prevent powdery and downy. Carefully follow the instructions....late evening or early AM application with time to dry off before hot sun hits them. It's almost to late for preventive........wet those leaves top and bottom very well. Then watch the leaves closely. Apply again in six or seven days. That has always worked for me.

8/10/2006 10:46:00 AM

Mill Bay, British Columbia

I used Neem Oil with baking soda and threw in a little milk (also as an experiment) with it last year and it seemed to do a really good job. My plants were healthy and green up till the end of October with little to no PM.

This year I brought in some Orthenex from the US and have been using it for bugs and as a fungicide. I have no signs of PM but in our climate it usually only shows up in late August to early September.

Steve, do you know if Myclobutanil is available in Canada and if so under what name?

8/10/2006 3:19:13 PM

hamilton,Ontario

well 1st minute able after work I bought another little pressure sprayer for newly titled fungicide applications. I used Hort oil+ floretech + baking soda and added into a sprayer with 2 litre water..sprayed the leaves and it seemed like the white mildew disappeared....padded dry a few leaves and they all look like new...we will see what tommorrow brings. For the experts out there what is it that the midew actually does besides make leaves look ugly???? as well with the application or mixtur I applied is there anything to worry about???..ie. burning...etc.. as well how often should I apply and how do I know if it worked????....some of the leaves were totally white now look fresh>.........thanks for all your help..CHEERS TO ALL....

8/10/2006 7:02:33 PM

[email protected]

Like Brad I am using a 10% milk spray at my son's elementery school. All I do is take 13 oz of 2% from the refrigerator here at home & add it to 1 gallon of water & drop it into the spray. I've been diligent about spraying the leaf bottoms every week & so far no Powdery Mildew at all.

Milk has preventive properties only & won't eradicate an infection.

8/10/2006 11:15:26 PM

[email protected]

Eng,

Burning is always possible in warm weather. Especially with Oil.

PM doesn't just make leaves ugly. To reproduce, the spores first must grow. So they "germinate" & grow into the leaf cells. By the time we see the tell-tale powder, the infected leaf cells are destroyed. In time we lose whole leaves. Since the leaves make the photo-synthate we need for fruit growth, we need the leaves to remain healthy & productive. Every missing cell is one less energy producing unit.

8/10/2006 11:20:03 PM

hamilton,Ontario

leaves all look like new...I guess I will watch the reprocussions over the next few days..Thanks to everyone who gave me some help. It was very very educational.........

8/11/2006 7:15:02 AM