Download or read book Cytospora Canker of True Firs written by Robert F. Scharpf and published by . This book was released on 1975 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cytospora Canker of True Firs written by Robert F. Scharpf and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cytospora Abietis the Cause of a Canker of True Firs in California and Nevada written by and published by . This book was released on 1942 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cytospora Canker of True Firs is Not Host Specific written by R. F. Scharpf and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Three isolates of Cytospora abietis were pathogenic to lathhouse-grown seedlings of Abies concolor and A. procera.
Download or read book Cytospora Canker written by and published by . This book was released on 1983 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Dynamics of Dwarf Mistletoe on Young True Firs in the Central Sierra Nevada California written by Robert F. Scharpf and published by . This book was released on 1982 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Young red firs (Abies magnifica A. Murr.) and white firs (A. concolor [Gord. & Glend.] Lindl. ex Hildebr.) on the Stanislaus National Forest, California, were inoculated with seeds of dwarf mistletoe (Arceuthobium abietinum) for 5 successive years. Only 3 to 4 percent of about 7000 seeds placed on branches resulted in infections. Second-generation infections developed and populations of the parasite built up on some trees but not on others after 17 years. Variables that appeared to regulate population increases included an 8- to 9-year average between inoculation and fruiting of plants, low rate of fruit production among female plants, low proportion of plants producing abundant fruit (100 or more/year), and irregular production of fruit on plants over the years, Death of infected branches also helped keep populations of the parasite in check. In vigorous, well-managed stands of young firs, dwarf mistletoe populations may not build up rapidly enough to result in serious losses.
Download or read book Pests of the Native California Conifers written by David Wood and published by Univ of California Press. This book was released on 2003-05-08 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide synthesizes the most current information available on the pests and environmental conditions that can damage California’s conifers, the vast majority of native trees in the state. Authoritative and easy-to-use, it is an essential reference for biologists, arborists, ecologists, foresters and everyone who needs up-to-date information on conifer pests in one convenient manual. o Species accounts cover life cycles, habits, distribution, and significance of each pest and discuss valuable options for reducing or avoiding damage o 111 clear color photographs show damage caused by 80 insects, diseases, fungi, parasitic plants, animals, and other destructive agents o The only guide to include information on environmental factors such as air pollution, salt, and frost as well as biological agents o Appendices list pests and diseases by tree species and by part of the tree affected
Download or read book Forest Insect and Disease Conditions written by and published by . This book was released on 1991 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Insect and Disease Conditions in the United States written by and published by . This book was released on with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Insect and Disease Conditions in the United States written by United States. Forest Service and published by . This book was released on 1992 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Idaho Forest Pest Conditions Program Summary written by and published by . This book was released on 1989 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cedar Leaf Blight written by and published by . This book was released on 1983 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Idaho Forest Insect Disease Conditions 1996 1997 1998 written by and published by . This book was released on 1999 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diseases of Pacific Coast Conifers written by Robert F. Scharpf and published by . This book was released on 1993 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Annual Western International Forest Disease Work Conference written by and published by . This book was released on 1978 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seed Dissemination in Small Clearcuttings in North central California written by Philip M. McDonald and published by . This book was released on 1980 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a 1964-1967 study on the Challenge Experimental Forest, seedfall was evaluated in 2-, 5-, and 10-acre circular clearcuttings. During the 4 years, 10 seed crops, ranging from light to bumper, were produced by ponderosa pine. white fir, Douglas-fir, and incense cedar. Seedfall ranged from 76 to 40,691 sound seed per acre (188 to 100,547/ha) for a single species in a given year. From 89 to 100 percent of each species' seed fell within an area 1 1/2 times the height of the average dominant tree. Overall, seed distribution was highly variable.
Download or read book Journal of Agricultural Research written by and published by . This book was released on 1943 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
