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Ontario, Canada.

The 1301 Eaton Has been mentioned as being resistant by Alan
Has there been any progress on this with other AG seed stocks? Seems to me that disease resistance is the next major hurdle to clear. Quadris has and is working for many growers but very costly to undertake a spraying program. Dwaine has commented about compost tea as well helping to resolve this virulent fungal disease. Could the 1301 breeding parents have transfered resistance to powdery mildew.

5/1/2004 10:18:30 AM

Ontario, Canada.

Mildew resistance to Strobilurin resistance (Quadris). A good article.
http://vegetablemdonline.ppath.cornell.edu/NewsArticles/Cuc_Strob.htm

5/1/2004 10:44:09 AM

Mill Bay, British Columbia

I found that regular spraying with kelp/seaweed kept the powdery mildew away this year and will continue to use it this year as well.

5/1/2004 12:32:59 PM

Appalachian Mtns.

Russ...the key is to rotate using different fungicides so resistance to 1 certain chemical isn't achieved. I'll be using this season, and rotating regularly....
Quadris
Compass
Eagle
Bravo
Ridomil Gold EC
Dithane M-45 and Manzate
Copper
Sulphur
and good ol' baking soda sprays....
Beginning in July I plan to use a different spray, or combo, each week and then specific sprays if a problem does occur.

5/1/2004 5:11:53 PM

Appalachian Mtns.

...and of course kelp and possibly compost tea spray.

5/1/2004 5:12:34 PM

Commack, NY

Kyle, be careful with the sulphur. I made a liquid with sulphur powder last year, and applied it to my plant. the day before the application i gained 25lbs......the day after 12 lbs. it took a few days to come out of the "funk".
Scott

5/1/2004 6:36:10 PM

Ctpumpkin@optonline.net

I'm working on a fungicide article for us. In the meanwhile, try to never rely on any systemic alone for Powdery Mildew. Adding a contact to a systemic is very good insurance against resistance.

I tried all Calcium & Neptune's Harvest to manage PM at my son's school last year. No statistical evidence of control there at all. But it should be noted that we are in PM heaven & that we grow there in a closed courtyard. About the worst conditions imaginable for managing PM.

Resistant seed stocks would be worth pursuing for sure.

Steve

5/1/2004 6:47:18 PM

Appalachian Mtns.

Thanks for the tip Scott...(BTW, 887 and 547 doing nicely)

5/1/2004 10:06:08 PM

Commack, NY

awesome!!

5/2/2004 11:50:32 AM

Ontario, Canada.

Kyle, Thanks for the advice. I hope to start off with Quadris, then to Bravo and of course Compost Tea. Supplemented with a weak blend of Baking Soda & Bleach using molasses as a sticker.

5/5/2004 10:28:31 PM

Montoursville, PA

Kelp in the ground and kelp foliar, AGRO-K'S VIGOR CAL-PHOS, AND teas get the credit here. No fungicide was used here last year until the last three weeks of September.

The compost aerobic teas possibly supported with worm kasts and other things like comfrey are being proven in other growing situations. I will be adding aerobic teas this summer. In theory the aerobic teas properly and effectively made on the grower's site will elimininate the need for many uses of insecticide and fungicide both as well as reduce the need for application of any other fertilizers.

This has been ackomplished commercially on some crops. As usual the pumpkin we grow has little if any track record outside of at best a blend of high humus and sometimes secretive additives.

I find it interesting that Japan is one of the leaders in sustainable agriculture using the principles of healthy patch while we often claim it can not be done. In our own country about 30% of the merchandice in the major grocery stores is now grown profitably using these techniques. A pretty healthy percentage of that volume is merchandised as organic.

5/12/2004 4:36:00 PM

Ontario, Canada.

Dwaine I hope you are right. Today I checked out my 709 McCallum and today it has a single yellow spot on one of its leaves. Yesterday it was the 190 Landry that had a yellow spot. I believe this to be the beginning of downy mildew. Sprayed yesterday with a systemic. All this after 3 applications of compost tea with much kelp. I could be wrong though?

5/12/2004 5:38:07 PM

Long Island,New York

It is not at all unusual for young plants to have bright yellow spots on the leaves. To my knowledge noones ever come up with a proven reason why....but it doesn't seem to effect the plant any either. It does , however, drive a new grower into a frenzy.........G

5/12/2004 6:21:45 PM

Ctpumpkin@optonline.net

I'm with G. A few yellow spots is no reasobn to kill the yoiung seedling with heavy duty fungicide sprays. There should be no fungal diseases active right now.

5/12/2004 7:30:50 PM

Appalachian Mtns.

Yea, many of them get these yellow spots...don't sweat it.

5/12/2004 8:16:57 PM

Ontario, Canada.

Geeze, I hope you guys are right. Last year I got nailed pretty good by these nothing to worry about bright yellow spots. 709 McCallum has three of them this morning.

Basket case in Barrie.

5/13/2004 12:40:02 PM

Ctpumpkin@optonline.net

After seeing those pictures I might also be concerned. It is odd to see this so early. Can you snip a diseased leaf & get it to a pathological lab?

5/13/2004 3:25:38 PM

http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=8867

http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=10001

I'm entirely with G. I know from experience that the yellow spots are nothing to worry about. Last year I was the "new grower drove into a frenzy." Check out the links. Nothing ever happened to the yellow spots in the pictures. The plants were fine.

5/13/2004 3:26:40 PM

Long Island,New York

The yellow spots in that picture you posted are NOT the yellow spots that will be asked about by the newer growers this month. Those are problem spots....a lab needs to be contacted to diagnose...G

5/13/2004 4:07:23 PM