Susceptibility of pine populations to western gall rust--central Idaho

Susceptibility of pine populations to western gall rust--central Idaho by R. J. Hoff Download PDF EPUB FB2

Susceptibility of pine populations to western gall rust--central Idaho. Ogden, UT: U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, (OCoLC) Susceptibility of pine populations to western gall rust--central Idaho / Related Titles.

Series: Research note INT ; By. Hoff, R. (Raymond J.) Intermountain Research Station (Ogden, Utah) United States. Forest Service. Type. Book Material. Published material. Publication info.

Ponderosa pine (P. ponderosa) does not appear particularly susceptible. This is one of the most common diseases of shore pine yet can be very patchy in distribution.

Unlike white pine blister rust, western gall rust does not require an alternate host to complete its life cycle. Spores produced on pine can reinfect susceptible pines. Susceptibility of pine populations to western gall rust--central Idaho / By R.

(Raymond J.) Hoff, Utah) Intermountain Research Station (Ogden and United by: 4. Differences in susceptibility among provenances of ponderosa pine (Pinus ponderosa) were observed in response to artificial inoculation by western gall rust (Endocronartium harknessii). Provenances were tested from NE Washington, N.

Idaho and W. Montana. These northern inland provenances were highly resistant to the rust with an average 28% of trees having galls 39 months after inoculation. Rust susceptibility in pine is known to be heritable, which means that the disease risk remains in a stand.

Also, if the climate becomes warmer and more humid, as expected, the risk of rust disease. The western gall rust infects more than 20 species of native and introduced hard pines. The fungus is most common in the West, where its principal hosts are lodgepole pine and ponderosa pine.

Besides lodgepole, ponderosa, and jack pines, the fungus has been reported on many other hard pines. Host: Ponderosa pine Figure White-spored gall rust displaying spore sacs and swollen branch.

Symptoms/Signs: This fungus forms round or pear-shaped galls on the main stem or branches, which emit orange spores. There is a white-spored race in Arizona. In Idaho, western white pine (Pinus monticola) occurs almost exclusively in the Northern Rockies about 50 years ago, it was the most abundant forest type in that region.

Prior to European settlement, the landscape pattern consisted of large mosaics of many thousands of acres, major portions of which were of a similar age class, a legacy of mixed-severity and large stand.

Hoff RJ. Susceptibility of pine populations to western gall rust--central Idaho (Vol. US Department of Agriculture, Forest Service, Intermountain Research Station, Washington, DC. Indresputra F, Rahayu S, Widiyatno. Effect of pyroclastic cloud from Merapi volcano to the survival of Uromycladium falcatarium on.

Susceptibility of pine populations to western gall rust-Central Idaho. U.S. For. Serv. Res. Note INT Resistance of Pinus sylvestris to a gall-forming Peridermium. INT-RN Susceptibility of Pine Populations to Western Gall Rust - Central Idaho.

INT-RN Association of an Endemic Mountain Pine Beetle Population with Lodgepole Pine Infected by Armillaria Root Disease in Utah. Pine-pine gall rust is a disease that occurs on 2-and 3-needle pine trees.

The disease is caused by the fungus Endocronartium harknessii. Other names for this disease include western gall rust and Woodgate gall rust. The name “pine-pine” gall rust indicates that the fungus spreads directly from one pine to another pine and does not require.

Western pine gall rust requires only one host, as spores from one pine tree can directly infect another pine tree. However, eastern pine gall rust requires both an oak tree and a pine tree.

Pine Gall Rust Treatment. Maintain proper care of trees, including irrigation as needed, as healthy trees are more disease resistant. Although some. A sample of 29 lodgepole pine (Pinuscontorta Dougl. var. latifolia Engelm.) trees was assessed from toand stem analysis data of 75 trees from five heavily infested second-growth stands in the foothills of the Rockies were analyzed to determine the incidence, development, and impact of western gall rust Endocronartiumharknessii (J.P.

Moore) Y. Hiratsuka, in relation to age of. Peridermium harknessii, cause of western gall rust of pines, comprises two populations of multilocus electrophoretic types (zymodemes) in the western United stained with a DNA-specific fluorochrome, mature, ungerminated aeciospores from zymodeme I were found to be predominantly binucleate (70%), as were those of the related macrocyclic species, Cronartium.

Pine-oak gall rust occurs on susceptible pine and oak trees throughout the United States. It is most prevalent in the Southern and Western United States. Hosts. Pine-oak gall rust infects a variety of pines.

Scots, Austrian, ponderosa, Jack, mugo, red, and Virginia pine are the most commonly infected. Pine-pine gall rust, also referred to as western gall rust, and Woodgate gall rust, is a fungal disease that infects two and three needle pine trees. It is caused by the fungus, Endocronartium harknessii.

Pine-pine gall rust is similar to pine-oak gall rust, though it does. The fungus that causes Western pine gall rust infects newly emerging shoots of susceptible trees in the spring. About a year or two after infection, the branch begins to swell to form a round gall.

Galls that are about three years old or older produce yellow spores in blisters underneath the bark in the spring, and these spores travel through. The number of western gall rust (Endocronartium harknessii) infections/tree was measured in a lodgepole pine (Pinus contorta) population consisting of trees in 20 blocks, established from a single, large seed lot collected and planted near Prince George, BC, Canada.

disease incidence in these blocks varied from to infections/tree. WGR is a disease that occurs on 2-and 3-needle pine trees. This disease does not affect 5-needle pines such as western white pine or sugar pine.

WGR is found in eastern North America as well, the common names “pine-to-pine gall rust”, “globose gall rust” or Woodgate gall rust are sometimes used.

Primary Hosts and Distribution.Pine-oak gall rust: A few galls, which may swell to 10 inches in diameter, form on two- and three-needled pines. Masses of yellow-orange spores erupt from the galls about a year after infection and blow to red oaks.

Small areas of yellow-orange spores develop on the underside of oak leaves in the summer. These spores reinfect oak.Susceptibility of pine populations to western gall rust--central Idaho /(Ogden, UT: U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, ), by R.

J. Hoff and Intermountain Research Station (Ogden, Utah) (page images at HathiTrust).