Dwarf Mistletoe On Red Fir
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Dwarf Mistletoe On Red Fir
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Author : Robert F. Scharpf
language : en
Publisher:
Release Date : 1969
Dwarf Mistletoe On Red Fir written by Robert F. Scharpf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Abies magnifica categories.
Dwarf Mistletoe In Red And White Firs In California 23 To 28 Years After Inoculation
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Author : J. R. Parmeter
language : en
Publisher:
Release Date : 1989
Dwarf Mistletoe In Red And White Firs In California 23 To 28 Years After Inoculation written by J. R. Parmeter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Abies concolor categories.
Spread and buildup of dwarf mistletoe, Arceuthobiun abietinum, was studied on inoculated white fir, Abies concolor, and red fir, A. magnifica, in northern Califomia for 23 to 28 years. At the end of these studies (1986), and in the absence of overstory infection, 13 of 23 trees had dwarf mistletoe populations that were the same or smaller than the original populations resulting from inoculation. Mortality of infections was the main factor limiting population increases. Live crown ratio of all trees averaged over 0.8. The average ratio of tree height growth to vertical spread rate of dwarf mistletoe was 11.5 to 1 in white fir and 7 to 1 in red fir in the Sierra Nevada. In the southem Cascades, the average ratio was 1.7 to 1 in red fir. About one fourth of the trees became infected in the bole. Of 14 additional trees infected by lateral spread of the parasite, 13 were within 6 m of the source of infection. Evidence continues to indicate that losses from dwarf mistletoes will be small in well-managed young fir stands free from infected overstory trees and properly spaced to promote good growth.
Dwarf Mistletoe Does Not Increase Truck Taper In Released Red Firs In California
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Author : Robert F. Scharpf
language : en
Publisher:
Release Date : 1977
Dwarf Mistletoe Does Not Increase Truck Taper In Released Red Firs In California written by Robert F. Scharpf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Arceuthobium categories.
Dwarf mistletoe had no noticeable effect on trunk taper of young, dominant and codominant red firs 4 to 22 inches (10.2 to 55.9 cm) d.b.h. Also, taper was not influenced by live crown ratio of infected and uninfected trees. Trees less than 7 inches d.b.h. had significantly more taper than larger trees, irrespective of dwarf mistletoe.
Population Buildup And Vertical Spread Of Dwarf Mistletoe On Young Red And White Firs In California
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Author : Robert F. Scharpf
language : en
Publisher:
Release Date : 1976
Population Buildup And Vertical Spread Of Dwarf Mistletoe On Young Red And White Firs In California written by Robert F. Scharpf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Abies concolor categories.
Rate of population buildup of dwarf mistletoe, Arceuthobium abietinum Engelm. ex Munz., was slow in most small red firs and white firs 12 to 15 years after inoculation with the parasite. Where population buildup did occur, it remained clustered in the lower portions of tree crowns near inoculation sites. Maximum distance of vertical spread was 16 feet (4.8 m), after 15 years. The mean annual rate of vertical spread of the parasite in 12 to 15 years was 3 inches (7 cm) or less in test trees. No vertical spread occurred in some trees. Rate of vertical spread was much slower in all trees than the mean annual height growth of vigorous young red or white firs. Therefore, the test trees were outgrowing the spread of dwarf mistletoe within tree crowns. Vertical spread rate and rate of tree height growth together determine the proportion of tree crown that will be infested at a given time after inoculation.
Population Dynamics Of Dwarf Mistletoe On Young True Firs In The Central Sierra Nevada California
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Author : Robert F. Scharpf
language : en
Publisher:
Release Date : 1982
Population Dynamics Of Dwarf Mistletoe On Young True Firs In The Central Sierra Nevada California written by Robert F. Scharpf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Arceuthobium categories.
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.
Dwarf Mistletoe And Host Tree Interactions In Managed Forests Of The Pacific Northwest
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Author : Donald M. Knutson
language : en
Publisher:
Release Date : 1980
Dwarf Mistletoe And Host Tree Interactions In Managed Forests Of The Pacific Northwest written by Donald M. Knutson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Dwarf mistletoe categories.
Determining The Age Of Dwarfmistletoe Infections On Red Fir
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Author : Robert F. Scharpf
language : en
Publisher:
Release Date : 1966
Determining The Age Of Dwarfmistletoe Infections On Red Fir written by Robert F. Scharpf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Abies magnifica categories.
Stem Infection By Dwarf Mistletoe In California Firs
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Author : J. R. Parmeter
language : en
Publisher:
Release Date : 1982
Stem Infection By Dwarf Mistletoe In California Firs written by J. R. Parmeter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Arceuthobium categories.
True Fir Dwarf Mistletoe
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Author :
language : en
Publisher:
Release Date : 1983
True Fir Dwarf Mistletoe written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Dwarf mistletoe categories.
Proceedings Of The Symposium On Dwarf Mistletoe Control Through Forest Management April 11 13 1978 Berkeley California
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Author :
language : en
Publisher:
Release Date : 1978
Proceedings Of The Symposium On Dwarf Mistletoe Control Through Forest Management April 11 13 1978 Berkeley California written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Arceuthobium categories.