Lecanium Scale

macrocarpa

Participating member
Location
Midwest
Is anyone else dealing with the explosion of lecanium scale on crabapples?

What treatment methods are you using and timing of applications?

Evidently its an annual re-infestation here in Central Ohio these days.

I am so close to telling customers I don't treat junk trees. I have pruned a couple decent crabapples over the years, but in general I think they require way to much maintenance for a large sucker of a tree.

I'm assuming well timed oil sprays are the most eco friendly treatment method?

Has anyone used azasol as a soil drench for scale and would it be a less destructive alternative to the neonics?
 

Jzack605

Branched out member
Location
Long island
I do well with IGR applications mixed with a contact insecticide like oil or bifenthrin. I forget the ai of the igr I use but trade name is distance.
 

macrocarpa

Participating member
Location
Midwest
If the trees are reasonably small that you can get thorough coverage, hort oil in late June should do the trick.
Thanks for the timing recommendation! This seems like the best treatment option as it appears to be an annual thing now.
 

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