Plant Database forum: Powdery Mildew resistant plant

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Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
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eclayne
Sep 17, 2014 2:43 PM CST

Plants Admin

While searching for potential garden additions of Pulmonaria and Tall Garden Phlox this past year I found many breeders claiming powdery mildew resistance for their plants. An internet search for "Powdery Mildew Resistance" yields a variety of results for studies on Phlox, Pulmonaria, Pumpkins and Squash, etc. While most studies report varying degrees of resistance to Powdery Mildew (excellent, fair, poor, etc.) I think a simple check box in our database, as follows, could be helpful. What do you all think?

Resistances
-Powdery Mildew

http://www.ces.ncsu.edu/fletcher/staff/rbir/phloxmildew.html
http://www.chicagobotanic.org/downloads/planteval_notes/no35...
http://extension.unh.edu/resources/files/Resource000617_Rep6...
http://hortsci.ashspublications.org/content/39/1/161.full.pd...
https://www.chicagobotanic.org/downloads/planteval_notes/no1...
Evan
Name: Deb
Pacific Northwest (Zone 8b)
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Bonehead
Sep 17, 2014 3:04 PM CST
I would find that useful for lots of plants. I hate that ugly gray look in late summer and would certainly place powdery mildew resistance high on my criteria list for squash, monarda, etc.
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Name: Ann ~Heat zn 9, Sunset
North Fl. (Zone 8b)
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flaflwrgrl
Sep 17, 2014 4:56 PM CST
I like this idea! This would also apply to certain Crepe Myrtle cultivars. Let's do it! Thumbs up
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Name: Lin
Florida (Zone 9b)
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plantladylin
Sep 17, 2014 4:58 PM CST
Thumbs up I like this idea too!
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Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
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dave
Sep 17, 2014 5:54 PM CST

Garden.org Admin

Good call. It's added! Thumbs up
Name: Ann ~Heat zn 9, Sunset
North Fl. (Zone 8b)
Garden Sages Native Plants and Wildflowers Xeriscape Organic Gardener I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level
Butterflies Charter ATP Member Plant Identifier Region: Florida Dog Lover Birds
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flaflwrgrl
Sep 17, 2014 6:06 PM CST
Thank you Evan for suggesting it & thank you Dave for implementing it.
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others.
~~ Sharon Brown ~~



Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
Charter ATP Member Plant Database Moderator Forum moderator Aroids Irises Celebrating Gardening: 2015
I was one of the first 300 contributors to the plant database! Tropicals Foliage Fan Bulbs Hummingbirder Lover of wildlife (Black bear badge)
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eclayne
Sep 17, 2014 6:21 PM CST

Plants Admin

Thanks Dave.
Evan
Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
Charter ATP Member Region: Texas Master Gardener: Texas Permaculture Raises cows I was one of the first 300 contributors to the plant database!
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dave
Sep 17, 2014 7:37 PM CST

Garden.org Admin

I tip my hat to you. Thanks Evan!
Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
Charter ATP Member Plant Database Moderator Forum moderator Aroids Irises Celebrating Gardening: 2015
I was one of the first 300 contributors to the plant database! Tropicals Foliage Fan Bulbs Hummingbirder Lover of wildlife (Black bear badge)
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eclayne
Sep 17, 2014 7:48 PM CST

Plants Admin

Thumbs up Thumbs up
Evan
Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
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Weedwhacker
Sep 21, 2014 9:46 PM CST
what does it actually mean if a plant is "mildew resistant" ? Does it tend to not GET mildewed, or does it just not succumb to the mildew?
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Name: Zuzu
Northern California (Zone 9a)
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zuzu
Sep 21, 2014 11:06 PM CST

Plants Admin

I would suppose it's the former because the plants I've seen with powdery mildew may have an unsightly appearance for a while, but they don't seem to suffer lasting damage. My experience is mainly with roses, however, so I'm not sure of the effects powdery mildew has on other plants.
Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
Charter ATP Member Celebrating Gardening: 2015 I was one of the first 300 contributors to the plant database! I helped beta test the first seed swap Region: United States of America Region: Michigan
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Weedwhacker
Sep 22, 2014 7:46 AM CST
Thanks, Zuzu -- my main concern is for squash and cucumber plants; I did find an article from the Univ. of New Hampshire extension service at this site http://extension.unh.edu/resources/files/Resource000617_Rep6... -- in part, it states:

"All pumpkins and squash will develop powdery mildew symptoms if weather conditions favor the fungus.
Resistant or tolerant varieties develop symptoms more slowly and maintain leaf coverage later in the
season."

They also list some varieties of pumpkin and squash that are resistant.

Interesting! Thanks, Evan, for bring this up Smiling
"Blessed is he who has learned to laugh at himself, for he shall never cease to be entertained."
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Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
Charter ATP Member Plant Database Moderator Forum moderator Aroids Irises Celebrating Gardening: 2015
I was one of the first 300 contributors to the plant database! Tropicals Foliage Fan Bulbs Hummingbirder Lover of wildlife (Black bear badge)
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eclayne
Sep 22, 2014 8:33 AM CST

Plants Admin

I think the former as well. For some food crops low resistance can result in lower yields or damaged fruit. Per UC IPM Online
...Severely infected plants may have reduced yields, shortened production times, and fruit that has little flavor.

http://www.ipm.ucdavis.edu/QT/powderymildewcard.html

Anecdotally my Lungwort (Pulmonaria saccharata 'Milky Way') plants, which have low or no Mildew resistance, have struggled for several years. Bethlehem Sage (Pulmonaria 'Spilled Milk') , with good mildew resistance, have multiplied well.
Evan
Surprisingly GREEN Pittsburgh (Zone 6a)
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crittergarden
Jul 4, 2015 2:29 PM CST
dave said:Good call. It's added! Thumbs up


@dave - can I search for plants resistant to powdery mildew?
if so, how?
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Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
Charter ATP Member Region: Texas Master Gardener: Texas Permaculture Raises cows I was one of the first 300 contributors to the plant database!
Garden Ideas: Master Level Beekeeper Garden Sages Avid Green Pages Reviewer Celebrating Gardening: 2015 Plant Identifier
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dave
Jul 4, 2015 4:10 PM CST

Garden.org Admin

Yes through the "Search by type" engine.

Go to the plants database homepage, then click on "Search by type" in the lefthand bar. Then you'll see Powdery Mildew as an option under Resistances.
Surprisingly GREEN Pittsburgh (Zone 6a)
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Dog Lover Birds Plant and/or Seed Trader Bulbs Echinacea Irises
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crittergarden
Jul 4, 2015 4:43 PM CST
Thank you!
SHOW ME YOUR CRITTERS! I have a critter page over at Cubits. http://cubits.org/crittergarden/thread/view/73275/
Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
Charter ATP Member Region: Texas Master Gardener: Texas Permaculture Raises cows I was one of the first 300 contributors to the plant database!
Garden Ideas: Master Level Beekeeper Garden Sages Avid Green Pages Reviewer Celebrating Gardening: 2015 Plant Identifier
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dave
Jul 4, 2015 5:37 PM CST

Garden.org Admin

I tip my hat to you.

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