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Canada

When should someone start spraying for PM?

The days have been warm ( still ) but the nights are getting cooler with heavy Dews setting overnight, I have been inspecting my plants on a daily basis and there is still no signs of any PM, I had plans on starting to spray
last week but have held off due to everything growing so well and no signs of PM, Over at fathers patch we have sprayed once as a few of his older leafs are starting to show signs of PM.

does it hurt to start now or should I hold off till she starts to appear?

thanks

P.S

The product I purchased to used is :

Green Earth Pre-Mixed, Redi-Spray Garden Fungicide
for controll of dieses on fruits vegetables roses and ornamental plants controlls powdery mildew, black spot, scab and certian mites. says to spray on 7-10 day intervals when problems show.

now this is probably best to be sprayed in the later afternoon hours i take it should i spray both tops and bottoms of leafs and vines? or will just the tops be fine?

thanks
Dave

8/17/2005 12:15:23 PM

Menomonie, WI (mail@gr8pumpkin.net)

ahhh We start around the 15 of July..Once you see it...It is to late. Spray the entire plant...Rotate fungicides every two weeks.

8/17/2005 1:29:13 PM

Midwest

Well, if you can believe the marketing, Bonide Remedy is supposed to be applied 'when the problem first appears'. It's supposed to control PM and a number of other diseases. I've been applying it since the beginning of July on a 2 week cycle. PM was a big problem in mid-late August last year. Start yesterday and continue throughout the rest of the season. Hope your plant makes it and you have a BIG pumpkin in October! And, you mention that you spray in the late afternoon... does that mean the leaves are wet at night? You might be setting up ideal conditions for PM by watering/spraying near evening.
Greg

8/17/2005 2:50:21 PM

Www.extremepumpkinstore.com

I started the end of june as the days were real humid and we were getting rain.
Once ya have it, its too late to prevent it.

8/17/2005 4:28:08 PM

addison Il

spray spray and spray again thats what this yr has taught me my plants have pm and im fighting it but i thinks its a losing battle will see what weights we get now lol its okay though this is my first yr and its all learning experience

8/17/2005 5:46:14 PM

Cincinnati,OH

Iv'e seen powdery mildew here on untreated plants. Don't wait. I start spraying about the middle of June and step up spraying after rain or cool weather.

8/17/2005 6:45:03 PM

Picton,ON (j.vincent@xplornet.ca)

As everyone has already said: Get at it! Most fungicides work as a preventitive. Some have curitive qualities like Daconil (Bravo in Canada). Unfortunatly some of the beter products require a pesticide licience. Al Eaton says in his GVGO interview that he uses severl over the counter products and rotates them. He has had good luck with them.
Good luck...keep that 721 healthy!
John

8/17/2005 11:29:47 PM

Canada

WOW, thanks for all the great input, the time i normally spray is around 4pm at this point the sun is still the plant but not the entire plant and by the time the sun does go down by 8.30-9pm the plants are dry, I'll start my 7 day spray cycle tomouro.

thanks for all the great information

Dave

8/18/2005 4:12:08 AM

Ctpumpkin@optonline.net

Frm an email I set to a grower I visited un Sunday. He hadn't started PM spraying until days before our visit either.

I enjoyed our visit & am pleased to see the patch is still clean. As the fruit grow larger the pressure of Powdery Mildew will increase dramatically. Hormonal triggers “tell” the plant that the mission of bearing progeny is now at hand. Hence production & defense of the leaf canopy is no longer a high priority. So the defense of foliage is ours alone now. The plants genetics will now only focus on the seeds.


<<Other club memers with big fruit on>> are both now losing the battle against Powdery Mildew having stuck to their conservative guns using older chemistries. <<Grower B>> is in better shape but still seeing PM. So far I haven’t seen any at all but my fruit is younger & my chemical program (arsenal?) more diverse.

Either way, the longer a fruit is on a plant, the more likely PM will overcome it's natural defenses.

8/18/2005 5:59:25 AM