No! Copper and Boron are incompatible in many formulations. Try a jar test
before mixing up anything, but I have found that Copper Hydroxide does not
mix well with Boron, but cause them to drop out of solution and clog up the
spray tank. I found this out the hard way. It might work with Copper
Oxychloride but I have my doubts.

Mike Wilson
Hunter Valley, Australia.