Maclean david a (6 Ergebnisse)

Zustand: Good. This is an ex-library book and may have the usual library/used-book markings inside.This book has soft covers. Clean from markings. In good all round condition. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,850grams, ISBN:9781900364447. …

Zustand: New. In English.

Hardback. Zustand: Very Good. Zustand des Schutzumschlags: Very Good. First edition. 1st 1983. Very good condition in a nearly fine dustwrapper. A book to synthesize the available data on the ecological impact of fire in the circumpolar regions. Based on a conference held at the University of New Brunswick in Fredericton, Canada in October 1979. Edited by Ross W. Wein and David A. MacLean. Green cloth boards, gilt title to spine. xxii and 322 pages including index. Top of spine lightly worn. Tape marks to endpapers. Small set of initials in red biro to top corner of front endpaper. Contents otherwise clean. White dustwrapper is lightly browned, lightly faded to spine, and a little scuffed to rear panel. Packaged with care and promptly dispatched.…

Hardcover. Zustand: Fine.

Zustand: Hervorragend. Zustand: Hervorragend | Sprache: Englisch | Produktart: Bücher | Spruce budworm (Choristoneura fumiferana (Clem.)) outbreaks are a dominant natural disturbance in the forests of Canada and northeastern USA. Widespread, severe defoliation by this native insect results in large-scale mortality and growth reductions of spruce (Picea sp.) and balsam fir (Abies balsamea (L.) Mill.) forests, and largely determines future age-class structure and productivity. The last major spruce budworm outbreak defoliated over 58 million hectares in the 1970s-1980s, and caused 32-43 million m3/year of timber volume losses from 1978 to 1987, in Canada. Management to deal with spruce budworm outbreaks has emphasized forest protection, spraying registered insecticides to prevent defoliation and keep trees alive. Other tactics can include salvage harvesting, altering harvest schedules to remove the most susceptible stands, or reducing future susceptibility by planting or thinning. Chemical insecticides are no longer used, and protection strategies use biological insecticides Bacillus thuringiensis (B.t.) or tebufenozide, a specific insect growth regulator. Over the last five years, a $30 million research project has tested another possible management tactic, termed an 'early intervention strategy', aimed at area-wide management of spruce budworm populations. This includes intensive monitoring to detect 'hot spots' of rising budworm populations before defoliation occurs, targeted insecticide treatment to prevent spread, and detailed research into target and non-target insect effects. The objective of this Special Issue is to compile the most recent research on protection strategies against spruce budworm. A series of papers will describe results and prospects for the use of an early intervention strategy in spruce budworm and other insect management.…

Taschenbuch. Zustand: Neu. Teaching: Professionalisation, Development and Leadership | Festschrift for Professor Eric Hoyle | David Johnson (u. a.) | Taschenbuch | xiv | Englisch | 2010 | Springer | EAN 9789048177981 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu.…