Praised by The New York Times as "an indispensable guide for the homeowner and the professional," Tree Maintenance has been the definitive source on maintenance of North American landscape trees for over fifty years, an essential reference not only for arborists, nurserymen, and landscape architects, but for all homeowners who want to keep their trees healthy and pest free.
The Seventh Edition, now named in honor of Dr. P. P. Pirone, who authored the first five editions and co-authored the sixth, has been revised to reflect the enormous amount of new information...

The chapters in this book represent detailed versions of papers presented at the Symposium on Viral Genes and Plant Pathogenesis held at Lexington, Kentucky on October 16 and 17, 1989. In selecting topics and authors, we attempted to have represented a spectrum of systems which are at the forefront of research on plant virus genes and gene products, particularly as they relate to plant disease. The book also contains pertinent discussion of the papers presented at the symposium, as well as summaries, observations and projections of future research directions prepared by the session chairmen....