Greene, I would interpret the "chemical" paragraph in your link as having more to do with protection from legal liability from off-label recommendations or unapproved products than advocating chemical pesticide use. They do say " First priority should be given to providing cultural and management information to minimize pest damage".
A article relevant to pesticide recommendations by Master Gardeners is this one from Oregon State, which advocates integrated pest management, where chemicals are used only as a last resort (which I would certainly hope most MG programs are encouraging):
http://extension.oregonstate.e...
Of course one may have a different opinion of what constitutes a "last resort"
Giving pesticide information doesn't have to encompass only recommendations to use them. With pesticide knowledge one can also reduce pesticide use by giving appropriate information. For instance if someone wants to go the chemical route then you can advise them what is the least toxic, or prevent them from using something inappropriate for their problem and therefore unnecessary.
Not that I'm advocating "chemical" pesticide use and I do understand that if one is philosophically opposed to their use it is difficult to give non-judgmental advice to someone intent on using them. On the other hand some home remedies are pretty scary too
