Using pesticides on unlisted plants

When you have a pesticide like orthene which does not list iris (or whatever
you want to use it on) in the accompanying literature, it is a good idea to
telephone the manufacturer.  Most major chemical companies have customer
service departments with 800 numbers, which you can get free from
1-800-555-1212.  I have done this on occasion and been told that the
chemical in question (sorry, I don't remember which) had been approved for
irises but the label had not yet been reprinted to reflect this fact.

Edmund L. Castillo in Loudoun Co., VA
castillo@pipeline.com
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