Use the current information in this manual to maintain and grow healthy nursery plant stock. Coverage includes diagnosis and control of more than 65 ornamental crops (shrubs, ground covers and shade trees) grown in nurseries throughout the United States. A summary of timely control measures is given for each disease that provide an in-depth guide to integrated disease management including cultural control, sanitation, resistance, fungicides and bactericides as well as information on control of various pathogen groups. Readers are helped further by 160 color plates illustrating disease symptoms, tissue culture techniques to eliminate pathogens from propagation stock, a state-by-state list of disease occurrences to make you aware of local problems, and an explanation of the role of plant diagnostic clinics in assisting nurseries in disease diagnosis. State-of-the-art information on important nursery crop issues and the latest horticultural practices in relation to the prevention, diagnosis and control of diseases will be helpful to nursery professionals, extension specialists, county agents, growers, tree-care professionals, master gardeners, researchers, educators, and regulatory personnel, and others who care for these valuable crops.
... de bienes exportables esta escasez se agravó a causa de grandes reducciones de los márgenes precio - costo , probablemente como resultado de la política del Gobierno de contener la inflación frenando sistemáticamente la tasa ...
Ecological pricing. Taming consumption, greening production. A question of
In this oversized volume, photographer Philippe Bourseiller documents the awesome power and devastating aftermath of volcanoes. More than 170 full-color double-page spreads, including satellite photos, depict the dramatic outbursts of...
Contributed articles.
Black maples can tower to eighty-five feet. Artisans craft fine musical instruments from the wood of native red spruces. And in autumn, the leaves of sugar maples turn brilliant orange-gloriously...
Beyond their esthetic and utilitarian importance, urban trees seem to fill a deeper human need. Perhaps they are reminders of the inexorable cycles of the natural world. Perhaps they serve...
A comprehensive introduction to the problem of tropical deforestation, giving a fresh analysis of the causes and the policies needed to slow and prevent it.
Working together, the Canadian forest community has recorded a number of major achievements toward meeting the goal of sustainable forests. This report reviews key achievements in the National Forest Strategy's...
David Allen Sibley, the preeminent bird-guide author and illustrator, now applies his formidable skills of identification and illustration to the trees of North America.Monumental in scope but small enough to...
From the National Wildlife Federation(R) comes the most up-to-date, all-photographic field guide to North American trees. The Jeffrey Pine, Coconut Palm, Staghorn Sumac, and Western Hemlock: this single, portable volume...