Ask a Question forum→What Is That Dust On My Lettuce?

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Name: Yardenman
Maryland (Zone 7a)
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Yardenman
Feb 23, 2021 7:32 AM CST
I have windowsill trays of lettuces, pak choy, radishes, and carrots growing under lights. Suddenly, there are dusty bits covering a lot of the leaves. I can't find an aphid or fly around them. Any idea what it is?
Georgia (Zone 8a)
Region: Georgia Enjoys or suffers hot summers Dog Lover Plant Lover: Loves 'em all! Cactus and Succulents Garden Art
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Hamwild
Feb 23, 2021 8:55 AM CST
Can you post a picture? Could be powdery mildew or a fungus of sorts, but without a picture, it is hard to say.
Name: Sally
central Maryland
Seriously addicted to kettle chips.
Charter ATP Member Houseplants Keeper of Poultry Vegetable Grower Region: Maryland Composter
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sallyg
Feb 25, 2021 6:44 AM CST
Spider mites.. I suspect. I have them on my lone romaine.
i'm pretty OK today, how are you? ;^)
Name: Yardenman
Maryland (Zone 7a)
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Yardenman
Feb 26, 2021 4:12 AM CST
Couldn't take one, but I found a pic of what I have. There is nothing moving or flying around, but that is what I see on leaves... Not bad as THAT but that's what I see.


Thumb of 2021-02-26/Yardenman/be4fed

[Last edited by Yardenman - Feb 26, 2021 5:53 AM (+)]
Give a thumbs up | Quote | Post #2443722 (4)
Name: Sally
central Maryland
Seriously addicted to kettle chips.
Charter ATP Member Houseplants Keeper of Poultry Vegetable Grower Region: Maryland Composter
Native Plants and Wildflowers Organic Gardener Region: United States of America Cat Lover Birds Butterflies
Image
sallyg
Feb 26, 2021 6:28 AM CST
No, not mites, but I don't know. I've seen that stuff before.
i'm pretty OK today, how are you? ;^)
Georgia (Zone 8a)
Region: Georgia Enjoys or suffers hot summers Dog Lover Plant Lover: Loves 'em all! Cactus and Succulents Garden Art
Lover of wildlife (Raccoon badge) Birds Hummingbirder Butterflies Bee Lover
Image
Hamwild
Feb 26, 2021 6:48 AM CST
sallyg said:No, not mites, but I don't know. I've seen that stuff before.


Same. I don't know what it is though. Sad
[Last edited by Hamwild - Feb 26, 2021 6:48 AM (+)]
Give a thumbs up | Quote | Post #2443755 (6)
Name: Yardenman
Maryland (Zone 7a)
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Yardenman
Mar 8, 2021 5:14 AM CST
It is aphid poop. I finally saw a few moving. They are the smallest aphids I ever saw. I needed a magnifying glass to finally detect them. Who knew they came so small?

I will put each tray in the laundry tub (they "just" fit) and blast them off as best I can and then use some Safer's soap spray on them after. Then blast them again to get any remaining and the soap spray off.

I really do appreciate all the help. But these are so TINY! I just couldn't even see them. Never seen them so small like that.

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