Pests and Diseases forum→Disease on Magnolia & Bamboo

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katekit09
May 7, 2020 6:23 PM CST
I'm not sure how to treat my Bamboo and Magnolia Tree because I can't identify this disease. Any help would be appreciated! :)

On top of leaves only
Brown or kind of white in some light
Somewhat powdery, can wipe off with mild effort
Not making the leaves bumpy

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Name: James
North Louisiana (Zone 8b)
Adeniums Cactus and Succulents Lover of wildlife (Raccoon badge) Growing under artificial light Ferns Garden Photography
Region: Louisiana Region: Gulf Coast Enjoys or suffers hot summers Critters Allowed Lover of wildlife (Black bear badge) Container Gardener
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deepsouth
May 7, 2020 6:29 PM CST

magnolia problem looks like Whiteflies .... treat with a insecticidal soap ... make sure to spray underneath leaves - as that is where they are feasting

not sure what is up with your bamboo ...same Whiteflies ??

katekit09
May 11, 2020 11:04 AM CST
Hmmm, thanks for the info. Not sure it's whiteflies as there's absolutely nothing on the underside of the leaves. I may try the insecticidal soap anyway - it may kill whatever it is.

But it appears to be the exact same thing on Bamboo and Magnolia. These plants are about 100 feet from each other and on opposite sides of the house. Nothing else between the two seem to be infected.

A friend thinks it may be powdery mildew, but it just doesn't seem to fit that one either.
Name: James
North Louisiana (Zone 8b)
Adeniums Cactus and Succulents Lover of wildlife (Raccoon badge) Growing under artificial light Ferns Garden Photography
Region: Louisiana Region: Gulf Coast Enjoys or suffers hot summers Critters Allowed Lover of wildlife (Black bear badge) Container Gardener
Image
deepsouth
May 11, 2020 11:31 AM CST
could be powdery mildew ....has it been wet where you are ?

powdery mildew is a fungal disease and can be treated with fungicides

also white flies secrete "honeydew" which is sugary & sticky (and attracts ants) ...and can be found on the top-side of leaves ....often turning black as it gets older

before spraying anything - try google > then > images .....one search for "white flies" another search for "powdery mildew" ...and see which one more closely resembles your situation
Northern NJ (Zone 6b)
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LorettaNJ
May 11, 2020 8:28 PM CST
Looks most like powdery mildew.

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