Download or read book Western Larch Seed and Cone Insects written by Michael J. Jenkins and published by . This book was released on 1991 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Maturation of western larch cones and seeds written by Raymond C. Shearer and published by . This book was released on 1977 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insect Damage to the Cones and Seeds of Pacific Coast Conifers written by John Martin Miller and published by . This book was released on 1914 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insect Damage to Western Larch Cones and Seeds in the United States written by Michael J. Jenkins and published by . This book was released on 1987 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of the Cone and Seed Insects of Eastern Larch Larix Laricina Du Roi K Koch and Attempts to Control Damage Using Chemical Insecticides written by Peter Augustine Amirault and published by . This book was released on 1984 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Evaluation of Cone and Seed Insects in Selected Seed Production Areas in Region 1 Progress Report II written by Jerald E. Dewey and published by . This book was released on 1980 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insect damage was extensive to Douglas-fir, ponderosa pine, western white pine, and western larch cones at most seed production areas surveyed in 1979. From 70 to 100 percent of the cones from several collecting periods were injured. Moderate damage (40-70 percent of cones injured) occurred to Douglas-fir, ponderosa pine, western larch, and western white pine from a few areas. Light damage (less than 40 percent) occurred on western white pine cones from a few seed production areas, and to all lodgepole pine and western hemlock cones collected. The primary insect species observed were western spruce budworm on Douglas-fir and western larch; midges on Douglas-fir, western larch, ponderosa pine, and lodgepole pine; cone worms on Douglas-fir, western larch, and ponderosa pine; and the Douglas-fir cone moth on Douglas-fir.

Download or read book An Evaluation of Cone and Seed Insects in Selected Seed Production Areas in Region 1 Progress Report written by Jerald E. Dewey and published by . This book was released on 1979 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: An evaluation was made in 21 seed production areas and 1 seed orchard in Region 1 to identify the primary insect pests and to assess amount of injury caused. Cones from Douglas-fir, grand fir, western larch, lodgepole pine, ponderosa pine, and western white pine were collected periodically and examined. The primary insect species observed were western spruce budworm on Douglas-fir, grand fir, and western larch; midges on Douglas fir, grand fir, western larch, ponderosa pine, and lodgepole pine; coneworms on Douglas-fir, grand fir, western larch, and ponderosa pine; and the Douglas-fir cone moth on Douglas-fir.

Download or read book Cone and Seed Insects of North American Conifers written by Alan F. Hedlin and published by Canadian Forestry Service ; [Washington, D.C.] : United States Forest Service; [Chapingo, Mexico] : Secretaria de Agricultura y Recursos Hidraulicos. This book was released on 1980 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes information on the recognition, biology, and importance of cone and seed destroying insects of Canada, the United States, and Mexico.

Download or read book Cone and Seed Insects of Western Forest Trees written by Frederick Paul Keen and published by . This book was released on 1958 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Cone and Seed Insects Working Party Conference written by International Union of Forestry Research Organizations. Working Party S2.07-01. Conference and published by . This book was released on 1984 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Southern pine seed and cone insects written by and published by . This book was released on 1975 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insects of Seed Cones in Eastern Canada written by Jean J. Turgeon and published by [Sault Ste. Marie, Ont.] : Canadian Forest Service. This book was released on 2005 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Maturation of Western Larch Cones and Seeds Classic Reprint written by Raymond C Shearer and published by Forgotten Books. This book was released on 2018-03-19 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Maturation of Western Larch Cones and Seeds Weekly cone collections from late July through September 1964 and 1965, and irregular collections in 1966 and 1967 were used to evaluate specific gravity and moisture content as indices of cone maturity. Although both indices decreased with advancing cone maturity, neither index gave a firm indication of seed maturity, but they did predict when cones would open. The ratio of embryo length to embryo cavity length gave the best estimate of seed maturity in 1964. Cones on a given tree all Open within a short period of time, but the opening of cones among individual trees within a stand may vary greatly. Larch cone collections can begin in mid-august; if cones are stored under well-ventilated conditions for several weeks before seeds are extracted, viability remains high. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Download or read book Seed and Cone Insects of Southern Pines written by and published by . This book was released on 1980 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography on Insects Destructive to Flowers Cones and Seeds of North American Conifers written by Dorothy R. Barcia and published by . This book was released on 1972 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Management of Insect Pests of Cones in Seed Orchards in Eastern Canada written by Jean J. Turgeon and published by [Sault Ste. Marie] : Ontario, Ministry of Natural Resources. This book was released on 1992 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide presents the principle components of seed orchard pest management, the development of a cone crop monitoring system, general guidelines and methods for monitoring, assessing impact, preventing and controlling cone and seed insects, the integration of cone management into a crop management program, and identification of damage caused by cone and seed insects of larch, pine, and spruce.

Download or read book Cone and Seed Insects of the Mexican Conifers written by David Cibrián-Tovar and published by . This book was released on 1986 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hosts, descriptions, damage, life cycle, habits, and importance of 54 known cone and seed destroying insects attacking Mexican conifer trees are discussed. Distribution maps and color photos are provided. New species described are three species of Cydia (seedworm), four species of Dioryctria (coneworm), and four species of cone feeding Apolychrosis.