leaf miners

[ncole]

Does anyone know what and when to spray for leaf miners on Korean box? 

[Nicolson]

check with Cooperative Extension - there are several sprays as well as some cultural controls - http://www.hgic.umd.edu/
Alice Nicolson, Arlington VA Master Gardener and (sort of) rock gardener in Z7

[RickR]

I didn't even know boxwood ever got leaf miners.  Of course, they are not a common plant here in the north, even though big box stores sell tons of them.   

Welcome to the forum, Alice.  And thanks for the link.  Many years ago, our U of Minnesota had a hort hot line, but they became so inundated with calls that they were forced to begin charging a fee.  We still have the county extensions and other free resources, though.