Initiation of stem infection in western white pine by blister rust [Cronartium ribicola]

2007 ◽  
Vol 29 (1) ◽  
pp. 18-24 ◽  
Author(s):  
R.S. Hunt ◽  
G. Roke ◽  
G.D. Jensen
Keyword(s):  
Cronartium Ribicola ◽  
White Pine ◽  
Blister Rust ◽  
Stem Infection ◽  
Western White Pine

Resistance to Cronartium ribicola in Pinus monticola: reduced needle-spot frequency

1980 ◽  
Vol 58 (5) ◽  
pp. 574-577 ◽  
Author(s):  
R. J. Hoff ◽  
G. I. McDonald
Keyword(s):  
Mating System ◽  
Rust Fungus ◽  
Low Frequency ◽  
Resistance Factor ◽  
Cronartium Ribicola ◽  
Pinus Monticola ◽  
Horizontal Resistance ◽  
White Pine ◽  
Blister Rust ◽  
Western White Pine

Low frequency of needle spots caused by the blister rust fungus (Cronartium ribicola J. C. Fisch. ex Rabenh.) in western white pine (Pinus monticola Dougl.) appears to be an expression of a horizontal resistance factor in secondary needles. Heritability averaged 37% for two sets of a 4 tester × 10 candidate mating system. We discuss the implications of these results with respect to developing varieties of western white pine resistant to blister rust.

scholarly journals White Pine Blister Rust in British Columbia II. Can Stands be Hazard Rated?

1983 ◽  
Vol 59 (1) ◽  
pp. 30-33 ◽  
Author(s):  
R. S. Hunt
Keyword(s):  
British Columbia ◽  
Cronartium Ribicola ◽  
White Pine Blister Rust ◽  
Pinus Monticola ◽  
White Pine ◽  
Tree Diameter ◽  
Blister Rust ◽  
Western White Pine ◽  
Hazard Rating

Twelve to 30-year-old western white pine (Pinus monticola Dougl.) in 23 stands in British Columbia were surveyed for blister rust (Cronartium ribicola J.C. Fisch. ex Rab.) cankers. Canker length, mid-point diameter, and height above ground were measured. The number of cankers per tree tended to increase with tree diameter, was variable within stands, and on 15 to 20 cm diameter trees ranged from a mean of one to 14 per stand and the overall mean was four cankers per tree. Large branches bore longer cankers and tended to be higher in the tree than small branches which bore short cankers. Incidence of cankers above 2.5 m tended to increase with increasing slope and they were on the side of the tree subject to evening breezes. Based on Idaho standards all sites in British Columbia were rated as low hazard, but trees growing on slopes had a higher risk than those on flat sites.Key words:Cronartium, Pinus monticola, hazard rating

scholarly journals A Comparison of Early Field Results of White Pine Blister Rust Resistance in Sugar Pine and Western White Pine

2000 ◽  
Vol 10 (3) ◽  
pp. 519-522 ◽  
Author(s):  
Richard A. Sniezko ◽  
Andrew Bower ◽  
Jude Danielson
Keyword(s):  
Unexpected Result ◽  
White Pine Blister Rust ◽  
Pinus Monticola ◽  
White Pine ◽  
Blister Rust ◽  
Stem Infection ◽  
Future Performance ◽  
Sugar Pine ◽  
Western White Pine ◽  
The Individual

Seedlings from 12 sugar pine (Pinus lambertiana Dougl.) and 13 western white pine (Pinus monticola Dougl.) families were planted at Happy Camp, Calif., in 1996. Assessment in Summer 1999 indicated moderate levels of white pine blister rust (Cronartium ribicola Fischer) infection. This paper focused on the species differences and showed that sugar pine had a higher incidence of stem infection (active and inactive cankers) and more stem infections per tree than western white pine. An unexpected result was the very high percentage of infections that were bark reactions (completely inactivated infections), despite the fact that only some of the families of both species were selected for this mechanism. Assessments in subsequent years will track the future performance of the two species and of the individual families.

scholarly journals Use of triadimefon to control white pine blister rust

1996 ◽  
Vol 72 (6) ◽  
pp. 637-638 ◽  
Author(s):  
Jean A. Bérubé
Keyword(s):  
Cronartium Ribicola ◽  
White Pine Blister Rust ◽  
White Pine ◽  
Growth Season ◽  
Effective Protection ◽  
Rust Infection ◽  
Blister Rust ◽  
Pine Seedlings ◽  
Second Growth ◽  
Bare Root

White pine seedlings were treated with triadimefon two weeks prior to natural inoculation with Cronartium ribicola and were observed for two growth seasons. During the second growth season in the greenhouse the incidence of blister rust symptoms was 70.8% for the untreated controls, whereas only 3.8% of the treated seedlings showed symptoms of blister rust. Triadimefon offers effective protection against white pine blister rust infection and would enable the production of bare root seedlings in areas prone to blister rust infection.

scholarly journals White Pine Blister Rust in British Columbia III. Effects on the Gene Pool of Western White Pine

1985 ◽  
Vol 61 (6) ◽  
pp. 484-488 ◽  
Author(s):  
R. S. Hunt ◽  
J. F. Manville ◽  
E. von Rudloff ◽  
M. S. Lapp
Keyword(s):  
Pacific Northwest ◽  
Gene Pool ◽  
Resistance Mechanisms ◽  
Geographic Range ◽  
White Pine Blister Rust ◽  
Pinus Monticola ◽  
White Pine ◽  
Blister Rust ◽  
The Pacific ◽  
Western White Pine

Cluster analyses of relative terpene abundance in foliage of western white pine (Pinus monticola Dougl.) trees from throughout the Pacific Northwest geographic range of the species were produced. Terpene patterns were randomly distributed among populations; no geographic or site trends were evident. Although blister rust is devastating to stands, the gene pool is widely distributed and may well be preserved without establishing gene banks.About 40-50 trees selected at random would yield offspring with nearly all possible terpene patterns characteristic of the species and would thus constitute a broad genetic base. Therefore seed orchards do not necessarily need to be composed of many individuals, rather, they should contain highly selected individuals with multiple desirable traits including multiple blister rust resistance mechanisms. Key words: terpenes, dendrogram

scholarly journals Characterization of Five Novel Mitoviruses in the White Pine Blister Rust Fungus Cronartium ribicola

PLoS ONE ◽  
2016 ◽  
Vol 11 (5) ◽  
pp. e0154267 ◽  
Author(s):  
Jun-Jun Liu ◽  
Danelle Chan ◽  
Yu Xiang ◽  
Holly Williams ◽  
Xiao-Rui Li ◽  
...  
Keyword(s):  
Rust Fungus ◽  
Cronartium Ribicola ◽  
White Pine Blister Rust ◽  
White Pine ◽  
Blister Rust

INSECTS AND MITES ASSOCIATED WITH WESTERN WHITE PINE BLISTER RUST CANKERS IN IDAHO

1972 ◽  
Vol 104 (11) ◽  
pp. 1713-1715 ◽  
Author(s):  
Malcolm M. Furniss ◽  
R. D. Hungerford ◽  
E. F. Wicker
Keyword(s):  
Bark Beetles ◽  
White Pine Blister Rust ◽  
Insect Infestation ◽  
White Pine ◽  
Blister Rust ◽  
Dioryctria Abietivorella ◽  
Western White Pine ◽  
Northern Idaho

AbstractInsects present in western white pine blister rust cankers in northern Idaho were: two weevils, Cylindrocopturus n. sp. and Pissodes sp. near swartzi Hopk.; two bark beetles, Pityophthorus sp. near nitidulus (Mann.), and Procryphalus ? sp.; a drosophilid fly, Paracacoxenus guttatus Hardy and Wheeler; and a phycitid moth, Dioryctria abietivorella (Grote). Mites associated with insect infestation were: Lasioseius ? n. sp., Ameroseius longitrichus Hirschmann, and Histiogaster arborsignis Woodring.

The relative susceptibility of needle- and stem-derived white pine tissue cultures to artificial inoculation with mycelium of Cronartium ribicola

1969 ◽  
Vol 47 (11) ◽  
pp. 1789-1790 ◽  
Author(s):  
A. E. Harvey ◽  
J. L. Grasham
Keyword(s):  
Rust Fungus ◽  
Cronartium Ribicola ◽  
Tissue Cultures ◽  
Pinus Monticola ◽  
White Pine ◽  
Relative Susceptibility ◽  
Blister Rust ◽  
Leaf Mesophyll ◽  
Leaf Tissues ◽  
Artificial Inoculations

Tissue cultures of Pinus monticola Dougl. derived from stem cortex and leaf tissues were found susceptible to artificial inoculations with mycelium from the blister rust fungus (Cronartium ribicola Fisch. ex Rabenh.). Tissue cultures from leaf mesophyll grew slower and were colonized more rapidly by this fungus than those derived from stem cortex.

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