Does anyone know what this is.

b3bowen

Mame
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All these white things are at the base of my contorted quince extending up some branches. Looks like some kind of pest. Just not sure what it is/if or how it should be treated. This was repotted in the fall and is now covered with extending flower buds/roots through the bottom mesh, so it seems healthy.E76A8CC6-ED7A-4304-BCB6-7339A68CA84A.jpeg
 
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All these white things are at the base of my contorted quince extending up some branches. Looks like some kind of pest. Just not sure what it is/if or how it should be treated. This was repotted in the fall and is now covered with extending flower buds/roots through the bottom mesh, so it seems healthy.View attachment 349654
I’ve been getting whatever you’ve got for 3 years now on my quinces. I spray a horticultural oil regiment every couple of weeks and they aren’t affecting the plant. Pain in the ass to clean off though.
 

Brian Van Fleet

Pretty Fly for a Bonsai Guy
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Looks like some phase of scale. I had similar on a trident maple a couple years in a row, and it was disgusting.
reminds me I should go check!
 

Aeast

Shohin
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Definitely a hard scale, possibly oyster shell scale. Kind of hard to control on large trees and shrubs but you shouldn't have a problem with this. You can use a brush and manually remove them, spray a dormant oil and also treat with a foliar application when the crawlers become active. Also you can treat with a systemic (not immidcloprid) in early spring before they start to feed. A combination of all is usually best with hard scale.
 

Aeast

Shohin
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Brian, your tree appears to have cottony maple scale, they're a soft scale.
 

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