Gesneriads forum: Need Help Something is Wrong

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Name: Linda
South East Wi (Zone 5b)
luvmyseeds
Jan 29, 2016 10:50 AM CST
Can anyone tell me what is going on with my Strep. It is something I have never
seen before. I checked with a magnifying glass and could not see anything moving.
Streps are new to me. I have collected at least 10 of them over the end of summer and early fall, and I don't want to lose them. Thanks !
Thumb of 2016-01-29/luvmyseeds/ab2527


Thumb of 2016-01-29/luvmyseeds/bd353d

Name: Donald
Eastland county, Texas (Zone 8a)
Region: Texas Enjoys or suffers hot summers Raises cows Plant Identifier
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needrain
Feb 2, 2016 6:09 AM CST
I've been hoping to see a reply here. I haven't ever grown Streps, but I'm wondering if this could be powdery mildew? If so, setting up a fan to blow on them would probably help. I'm just guessing here. I can't really tell. Did you spray the foliage with anything? Could it be a mineral buildup left from the water?
Donald
Name: Linda
South East Wi (Zone 5b)
luvmyseeds
Feb 2, 2016 10:09 AM CST
No, nothing was sprayed on the foliage. The humidity is 45 to 50 % already. I'll check out powdery mildew. Thanks Donald
for the suggestion.
Name: Donald
Eastland county, Texas (Zone 8a)
Region: Texas Enjoys or suffers hot summers Raises cows Plant Identifier
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needrain
Feb 2, 2016 10:47 AM CST
I should have been more clear, so I will double check. Do you mist them with water? If so, is it treated water? I ask because sometimes my tap water will leave white residue on leaves. It has some mineral content which doesn't evaporate and leaves the whitish coating. I'm not sure why my water doesn't do it all the time. I suspect the water treatment plant isn't always consistent, but I don't know. I do grow Achimenes and Eucodonias, but only outside in the summer and they are remarkably pest free plants.
Donald
Name: Critter (Jill)
MD (Zone 6b)
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critterologist
Feb 2, 2016 10:53 AM CST
When I enlarge the photo, the white looks fuzzy, or maybe like a sprinkling of confectioner's sugar... powdery mildew seems likely. Increasing air circulation by spacing plants more widely and turning a fan on them should help... you'll find various remedies online, too... spraying with hydrogen peroxide (2 tablespoons per quart of water) is where I'd start, or maybe rubbing the solution onto the leaves with a paper towel so you get the mildew residue off at the same time.
I'm learning to dance in the rain. Thank you, Sally & Chris.
Name: Karen
NM , AZ (Zone 7b)
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plantmanager
Feb 2, 2016 11:02 AM CST
I had something similar on my tomatoes, and it turned out to be white fly eggs. Do you have any whiteflies around?
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Name: Linda
South East Wi (Zone 5b)
luvmyseeds
Feb 2, 2016 11:51 AM CST
I looked on line after Donald's response and I do have to agree with him and Jill. The plants are in a humid room and are really cramped together. I'll try Jill's remedy for powdery mildew (2 tbl hydrogen peroxide and 1 qt. water.)
this is a first for me with powdery mildew on a houseplant.

Thanks everyone.

No whiteflies here.
Name: Critter (Jill)
MD (Zone 6b)
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critterologist
Feb 2, 2016 12:00 PM CST
Strep foliage is pretty tough, so you could wash with dish soap, etc. also. I've even sprayed them with 40% alcohol to get rid of scale or mealybugs. Hopefully the PM will be easily banished! Good luck
I'm learning to dance in the rain. Thank you, Sally & Chris.
Name: Lin
Florida (Zone 9b)
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plantladylin
Feb 2, 2016 6:32 PM CST
I googled and found the following page that shows a photo of a Strep leaf with Botrytis (Grey Mold) that looks a lot like the leaf in your photo: http://www.dibleys.com/pests/
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Name: Linda
South East Wi (Zone 5b)
luvmyseeds
Feb 4, 2016 6:53 AM CST
After spraying with the Hydrogen peroxide mixed with water the leaves look so much better. Thanks again for the help.
Name: Critter (Jill)
MD (Zone 6b)
We're all learners, doers, teachers
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critterologist
Feb 4, 2016 11:14 PM CST
Hooray!
I'm learning to dance in the rain. Thank you, Sally & Chris.
Name: Eileen
Palm Bay, FL
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imadigger
Aug 20, 2016 12:20 PM CST
Just came across this post and I have to add my comments. It looks like powdery mildew to me. This is fungus family and comes when air is moist and warm. If not caught early, it will suck life out of the leaves. If you wait too long to get rid of it, it leaves spores on everything.
I lost all of my mature African violets this past Marcch/April. I have two 5-shelf units and one unit had nine trays of my mature violets. I didn't notice it at first. Then I spotted the mildew on one whole tray of about nine to ten plants. I sprayed them with diluted Lyslol couldn't save a one. I sprayed the violets with milk, a fungicide spray, and neem oil. I had waited too long to catch them in time. I lost them all. I had leaves potted in another room, so I still had violets.
The message here is to catch it quickly. Another forum member suggested putting little saucers of sulfur in each tray, on every shelf. That is what I'm doing now. My air-conditioning in on until probably October. Come March or April when we shut it down I will have to be eagle-eyed and watch those violets like a hawk. I sure don't want to lose any more.
Name: Critter (Jill)
MD (Zone 6b)
We're all learners, doers, teachers
Charter ATP Member Region: Maryland Bulbs Amaryllis Tropicals Cottage Gardener
Critters Allowed Birds Butterflies Hummingbirder Lover of wildlife (Black bear badge) Bee Lover
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critterologist
Aug 21, 2016 10:27 AM CST
So sorry! All those mature plants -- what a loss! aaargh Glad you had some leaves down.
I'm learning to dance in the rain. Thank you, Sally & Chris.

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