Download or read book Dutch Elm Disease Proceedings of IUFRO Conference Minneapolis St Paul Sept 1973 written by and published by . This book was released on 1975 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dutch Elm Disease written by International Union of Forestry Research Organizations and published by . This book was released on 1975 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dutch Elm Disease written by and published by . This book was released on 1975 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dutch Elm Disease written by and published by . This book was released on 1965 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dutch Elm Disease written by Union internationale des instituts de recherches forestières and published by . This book was released on 1975 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dutchelm Disease Proceedings of Iufro Conference Held at Minneapolis St Paul Usa September 1973 written by North Central Forest Experiment Station (Saint Paul, Minn.) and published by . This book was released on 1975 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dutch Elm Disease written by International Union of Forestry Research Organizations and published by . This book was released on 1975 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Elm written by R. H. Richens and published by Cambridge University Press. This book was released on 1983-10-20 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elm, one of the three principal landscape trees of England, differs from the others in its complex variability and its intricate relationship with human settlement. Originally published in 1983, the present book covers all its aspects: its history, its use and distribution by man from prehistoric times onwards, its vernacular names, the numerous organisms associated exclusively with it and its place in English literature and the visual arts. The book will be of value to anyone with an interest in the English landscape. It is of particular relevance to botanists, foresters, archaeologists, historical linguists, zoologists, students of English literature and the fine arts, and workers in the areas of conservation and town and country planning.

Download or read book Durable Resistance in Crops written by F. Lamberti and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant diseases and pests are a major constraint to agricultural production despite the various measures used to control them. Chemical control, although often e~~ective, may pose environmental hazards and is relatively expensive, especially in developing countries where it may be completely uneconomic. Control through genetically mediated resistance to diseases and pests, is both cheap and environmentally sa~e and at present most diseases and pests o~ staple ~ood crops are controlled through some form of resistance. One of the basic problems in the use of resistance is its ~re quent lack of durability; very often a type of resistance is used that 'breaks down' after a certain period. The temporary nature of this resistance, due to the development of new strains of pest or pathogen able to overcome it, has seriously hindered the improvement o~ the yield potential of many crops as a continuing effort is needed to replace old cultivars who resistance has failed, with new ones. Following Vanderplank's now classical publications (1963, 1968) which differentiated horizontal and vertical resistance, studies on several host-parasite systems have shown that di~ferent types of resistance can be distinguished genetically and epidemiologically, and on the ability o~ the pests or pathogens to adapt to them. A knowledge of how resistance operates at the population level has also opened up possibilities of 'managing' relatively simple resistance types in such a way that a stable host-pathogen system can be pro duced with a minimum of crop loss.

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1976 with total page 1932 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Control of Arthropod Forest Pests of the Western United States written by T. S. Bellows and published by . This book was released on 1998 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings Dutch Elm Disease Symposium and Workshop written by and published by . This book was released on 1981 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 1975 at the Northeastern Forest Experiment Station written by Northeastern Forest Experiment Station (Radnor, Pa.) and published by . This book was released on 1976 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book At the Northeastern Station written by Northeastern Forest Experiment Station (Radnor, Pa.) and published by . This book was released on 1976 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Arboriculture written by and published by . This book was released on 1998 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Meeting of the Canadian Tree Improvement Association written by Canadian Tree Improvement Association and published by . This book was released on 1978 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Meeting of the Canadian Tree Improvement Association Part 2 written by Canadian Tree Improvement Association and published by . This book was released on 1973 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: