What's this white stuff?

Messages
846
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842
Location
Lincoln, CA
USDA Zone
9b
#1
This is new to me. White powdery stuff that is hard and rubs off like powder.
Similar to bird droppings. One is on an elm the other on a JBP.

Thought maybe fungus or mildew but it's hard. Hard and dry. Not spongy at all.

What is it? Pix aren't great but camera wants to focus on other stuff.

Thanks.

:) P1040767.JPG P1040768.JPG
 

Brian Van Fleet

Imperial Masterpiece
Messages
9,996
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21,346
Location
B’ham, AL
USDA Zone
8A
#2
Tough to tell from those photos. Pines can get a pine tip moth infestation that looks a little like that. Try more pix.
 
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181
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123
Location
Front Royal, VA
USDA Zone
6
#6
Hard to control and probably adelgid but looks like mealy bug too. Adelgid has killed most large hemlocks in the Shenandoah Valley. You should use a systemic that is labeled for adelgid. If it kills adelgid it will kill mealy bug. Best of luck.
 
Messages
846
Likes
842
Location
Lincoln, CA
USDA Zone
9b
#7
Got better pix. You can see what flakes off on to the black paper from the elm twig.
The pine is less today as I did spray it with some Neem oil yesterday.

It is dry and flaky.

P1040769.JPG P1040770.JPG
 
Messages
846
Likes
842
Location
Lincoln, CA
USDA Zone
9b
#9
Definitely adelgid. They're pretty common and a PITA...
I used some Bayer Tree & Shrub Feed and Protect combination feed and systemic insecticide. It's labeled for adelgid if that's what it is.
I also sprayed some weak Safer soap on the areas.
 
Messages
706
Likes
620
Location
Western NC
USDA Zone
7a
#11
The stuff in the photo on the left looks like scale and on the right is likely adelgid. The Bayer should do the trick, but be aware that the active ingredient imidcloprid has been identifed with bee decline so don’t spray on anything that flowers.
 

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