Výsledky vyhledávání - "Darrin L, Walenta"

Reducing Claviceps purpurea sclerotia germination with soil-applied fungicides

Autor: Jeremiah K. S. Dung, Navneet Kaur, Philip B. Hamm, Kenneth E. Frost, Darrin L. Walenta, Stephen C. Alderman

Publikováno v: Crop Protection. 106:146-149

Ergot, caused by the fungus Claviceps purpurea, is an important seed replacement disease of perennial ryegrass (Lolium perenne L.) grown for seed in the U.S. Pacific Northwest. Current management efforts rely on multiple fungicide applications to pro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::606720f889999f372060d1d5ac720b94
https://doi.org/10.1016/j.cropro.2017.12.023

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Identification of Environmental Factors Related to Claviceps purpurea Ascospore Production in Perennial Ryegrass Seed Fields and Development of Predictive Models

Autor: Kenneth E. Frost, Darrin L. Walenta, Navneet Kaur, Philip B. Hamm, Jeremiah K. S. Dung, Stephen C. Alderman

Publikováno v: Plant disease. 101(6)

Claviceps purpurea, the causal agent of ergot of perennial ryegrass seed crops, overwinters as sclerotia in the soil and releases airborne ascospores in the spring that infect flower ovaries and replace seed with sclerotia. Burkard spore traps were u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99df495edc0292e747e8677a9e3bf6b8
https://pubmed.ncbi.nlm.nih.gov/30682939

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Spatial Patterns of Ergot and Quantification of Sclerotia in Perennial Ryegrass Seed Fields in Eastern Oregon

Autor: Darrin L. Walenta, Stephen C. Alderman, Philip B. Hamm, Jeremiah K. S. Dung

Publikováno v: Plant Disease. 100:1110-1117

Ergot, caused by Claviceps purpurea, is a major disease of perennial ryegrass grown for seed in eastern Oregon. The objective of this research was to quantify and describe the spatial patterns of ergot severity in each of three 50-ha commercial field

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e11019342bdb37d876675addeed72fc3
https://doi.org/10.1094/pdis-08-14-0787-re

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Detection and Quantification of Airborne Claviceps purpurea sensu lato Ascospores from Hirst-Type Spore Traps using Real-Time Quantitative PCR

Autor: Jeness C. Scott, Stephen C. Alderman, Jeremiah K. S. Dung, Kenneth E. Frost, Darrin L. Walenta, Philip B. Hamm, Navneet Kaur, Qunkang Cheng

Publikováno v: Plant disease. 102(12)

The U.S. Pacific Northwest states of Oregon and Washington are major producers of cool-season grass seed. Ergot, caused by fungi in the Claviceps purpurea sensu lato group, is an important seed replacement disease of grass worldwide. Microscopic meth

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95892d8c2074cad56f27bde3b3ea680d
https://pubmed.ncbi.nlm.nih.gov/30256180

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Afternoon Ascospore Release in Claviceps purpurea Optimizes Perennial Ryegrass Infection

Autor: Stephen C. Alderman, J. K. S. Dung, Ruth C. Martin, Philip B. Hamm, Evsey Kosman, Darrin L. Walenta

Publikováno v: Plant Disease. 99:1410-1415

In Kentucky bluegrass (Poa pratensis), Claviceps purpurea, the causal agent of ergot, typically releases ascospores during the early-morning hours, between about midnight and 10:00 a.m., corresponding to time of flowering, when the unfertilized ovari

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::158ca16adb2ee2915fa85fc02f29dc10
https://doi.org/10.1094/pdis-09-14-0978-re

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Dispersal Potential of Ergot Spores by Insects Foraging in the Perennial Ryegrass Fields in the Columbia Basin of Oregon and Washington

Autor: Kenneth E. Frost, Navneet Kaur, Silvia I. Rondon, Philip B. Hamm, Jeremiah K. S. Dung, S. C. Alderman, Jeness C. Scott, R. A. Cating, Darrin L. Walenta

Publikováno v: Crop, Forage & Turfgrass Management. 5:190020

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::54dae1526c8ee5fff8ed68a5954b19b5
https://doi.org/10.2134/cftm2019.04.0020

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Spring-germinating jointed goatgrass (Aegilops cylindrica) produces viable spikelets in spring-seeded wheat

Autor: Daniel A. Ball, Darrin L. Walenta, J. Richard Alldrege, Frank L. Young, Joseph P. Yenish

Publikováno v: Weed Science. 51:379-385

The most common strategy recommended for management of jointed goatgrass infestations is to rotate from winter wheat to a spring crop for several years. A field study was conducted at three locations in 1998 and 1999 to determine the effects of sprin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f3a0ccdff8550cb668874c47a6965b23
https://doi.org/10.1614/0043-1745(2003)051[0379:sjgacp]2.0.co

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Vernalization response of plants grown from spikelets of spring and fall cohorts of jointed goatgrass

Autor: Frank L. Young, Darrin L. Walenta, Daniel A. Ball, Joseph P. Yenish

Publikováno v: Weed Science. 50:461-465

Jointed goatgrass is most commonly described as a winter annual species. However, it has been observed to produce spikes in spring crops, apparently without being exposed to vernalizing conditions. A controlled environment study was conducted to dete

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::217bc7e5e93d146bdf5bc5e097f91973
https://doi.org/10.1614/0043-1745(2002)050[0461:vropgf]2.0.co

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