That's cheap, but the 2nd edition has over $60 of updates imo. Still it's great, and very easy to use. they even have a common name index.Do you have Diseases of Trees and Shrubs By Lyon & Sinclair? I saw some used first edition ones for $16.
to me, diagnosis is the tough part. once you diagnose, a few minutes in google ususally turns up some extension publications that will cover treatment.Bear in mind they will say little about treatment, just diagnosis.
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