Hattie the Hen
Deeply Rooted
In the past I have used this type of trap. It is very useful for dealing with Codling Moths in apple trees:
http://www.harrodhorticultural.com/...nsect and Pest traps and barriers/GPC-200.htm
For plum trees (plum moth):
http://www.harrodhorticultural.com/...nsect and Pest traps and barriers/GPC-210.htm
This info is from the supplier I use in the UK because I trust them but I'm pretty sure you have similar products over in the US.
:rose Hattie :rose