Article
Plant Sciences
Nicholas C. Carleson, Hazel A. Daniels, Paul W. Reeser, Alan Kanaskie, Sarah M. Navarro, Jared M. LeBoldus, Niklaus J. Grunwald
Summary: The study contrasts the population dynamics of sudden oak death caused by Phytophthora ramorum in Oregon between the NA1 lineage outbreak in 2001 and the emergence of the EU1 lineage in 2015. The EU1 lineage showed low diversity and spatial clustering, while the older NA1 populations were more polymorphic and spread over a larger area.
Article
Plant Sciences
Cai H. Thompson, Mitchell M. McCartney, Tatiana Roubtsova, Takao Kasuga, Susan E. Ebeler, Cristina E. Davis, Richard M. Bostock
Summary: Phytophthora ramorum is an invasive pathogen causing ramorum blight and sudden oak death, with asymptomatic infections in nursery stock creating unacceptable risk. A VOC-based test successfully detected P. ramorum infections in Rhododendron plants, with unique changes induced by different pathogens. Predicting infection status was successful from ambient volatiles, while extracted leaf volatiles resulted in lower accuracy.
Article
Microbiology
Melina Kozanitas, Margaret R. Metz, Todd W. Osmundson, Maria Socorro Serrano, Matteo Garbelotto
Summary: This study indicates that the disease incidence of bay laurels is positively correlated with rainfall, bay laurel density, and an eastern aspect, while negatively correlated with bay laurel basal area. Oak infection only occurs in years with above-average rainfall, and larger oaks have higher infection rates but smaller trees have higher mortality rates. Larger oaks closer to infected bay laurels also exhibit higher infection rates.
Article
Forestry
Francisco J. Ruiz-Gomez, Cristina Miguel-Rojas
Summary: This study focused on searching for natural biocontrol agents in oak woodlands to combat Phytophthora cinnamomi root rot, a major cause of oak mortality. Native Trichoderma strains were isolated and found to inhibit the growth of P. cinnamomi, potentially protecting trees from the disease. The research suggests that Trichoderma spp. could play a role in integrated pest management strategies to manage oak diseases in Mediterranean open woodlands.
Article
Agronomy
Chaoqun Zang, Tingting Kong, Bingbing Liang, Xiaozhou Liu, Jinhui Xie, Ying Lin, Xue Pei, Shuyi Yu, Chunhao Liang
Summary: Phytophthora blight is a serious disease of pepper production, and this study evaluated Streptomyces atratus PY-1 as a potential biocontrol agent. Strain PY-1 inhibited the growth of P. capsici mycelia and its main active component, imide substance, caused the mycelia to rupture and become deformed. The imide substance showed strong control ability against P. capsici, even at high dilutions, and could be a potential alternative to chemical fungicides.
EUROPEAN JOURNAL OF PLANT PATHOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Seraphin M. Kulimushi, William M. Muiru, Eunice W. Mutitu
Summary: The study demonstrates that selected microbial antagonists effectively managed early blight in tomatoes under both greenhouse and field conditions, minimizing yield losses caused by the disease. These antagonists are more environmentally friendly compared to chemical pesticides and should be integrated into the comprehensive management of early blight of tomatoes.
BIOCONTROL SCIENCE AND TECHNOLOGY
(2021)
Article
Horticulture
Oksana Lastochkina, Liudmila Pusenkova, Darya Garshina, Cemal Kasnak, Recep Palamutoglu, Irina Shpirnaya, Il'dar Mardanshin, Igor Maksimov
Summary: This study evaluated the effects of the endophytic bacteria Bacillus subtilis and its combination with salicylic acid on stored Phytophthora infestans-infected potato tubers. The results showed that infection with P. infestans significantly increased tuber decay and oxidative and osmotic damage. However, treatments with B. subtilis and its combination with salicylic acid reduced disease incidence and damage in stored tubers.
Article
Forestry
Hazel A. Daniels, Lindsay Bulman, Jared M. LeBoldus
Summary: In the context of forest harvest and replanting, radiata pine has a relatively low risk of infection from Phytophthora ramorum due to the lack of sporulating hosts nearby.
Article
Plant Sciences
Devin Bily, Beth McClelland
Summary: Magnolia 'Butterflies' is a hybrid cultivar derived from M. acuminata and M. denudata. A survey of an ornamental plant nursery in Fairfax County, VA revealed leaf necrosis and premature senescence on the lower branches of 6 out of 11 plants in 18.9-liter pots. The causal agent was identified as Phytophthora nicotianae. This is the first report of this species causing foliar necrosis on Magnolia 'Butterflies' in a nursery or in the field.
PLANT HEALTH PROGRESS
(2023)
Article
Plant Sciences
Soum Sanogo, Phillip Lujan
Summary: Identifying effective combination treatments against Phytophthora capsici in chile pepper and other vegetable crops is essential. Soil treatment with mefenoxam significantly reduces the area under disease progress curve (AUDPC) and improves plant stand and survival rates.
ARCHIVES OF PHYTOPATHOLOGY AND PLANT PROTECTION
(2022)
Article
Agronomy
Snezhana Milusheva, James Phelan, Neshka Piperkova, Viktorija Nikolova, Mariyana Gozmanova, Delano James
EUROPEAN JOURNAL OF PLANT PATHOLOGY
(2019)
Article
Plant Sciences
Delano James, James Phelan, Daniel Sanderson
CANADIAN JOURNAL OF PLANT PATHOLOGY
(2019)
Article
Agronomy
N. Feau, D. I. Ojeda, S. Beauseigle, G. J. Bilodeau, A. Brar, S. Cervantes-Arango, A. L. Dale, B. Dhillon, C. Hammett, P. Herath, S. F. Shamoun, C. K. M. Tsui, P. Tanguay, R. C. Hamelin
Article
Plant Sciences
Jean A. Berube, Patrick N. Gagne, Julien P. Ponchart, J. Phelan, A. Varga, D. James
CANADIAN JOURNAL OF PLANT PATHOLOGY
(2019)
Article
Plant Sciences
Daniel Sanderson, Delano James
CANADIAN JOURNAL OF PLANT PATHOLOGY
(2019)
Article
Microbiology
Simon Francis Shamoun, Craig Hammett, Grace Sumampong, Xiang Li, Matteo Garbelotto
Editorial Material
Plant Sciences
M. Elliott, L. Rollins, T. Bourret, G. Chastagner
Editorial Material
Plant Sciences
M. Elliott, L. Rollins, T. Bourret, G. Chastagner
Article
Mycology
Michael Bradshaw, Uwe Braun, Marianne Elliott, Julia Kruse, Shu-Yan Liu, Guanxiu Guan, Patrick Tobin
Summary: The study identified Sawadaea bicornis as the fungal pathogen causing a widespread infection of Acer macrophyllum in western North America. Genetic analysis revealed a European origin of the pathogen and at least 82 years of presence in North America. This study used old herbarium specimens to determine the origin, native host, and invasion time of the detrimental fungal plant pathogen.
Editorial Material
Plant Sciences
Marianne Elliott, Lucy Rollins, Tyler Bourret, Joseph M. Hulbert, Gary Chastagner
PLANT HEALTH PROGRESS
(2021)
Article
Plant Sciences
Marianne Elliott, Darren Strenge, Joseph M. Hulbert, Gary A. Chastagner
Summary: Collaboration and various measures were implemented at Bloedel Reserve to successfully reduce the impact of P. ramorum on the garden, while educating the public about invasive species to raise awareness.
PLANT HEALTH PROGRESS
(2021)
Article
Microbiology
Simon Francis Shamoun, Marianne Elliott
Summary: The invasive pathogen Phytophthora ramorum has caused significant damage to oak and tanoak trees in California and southern Oregon forests. Biocontrol treatments using the sap-rotting fungus Chondrostereum purpureum have shown effectiveness in suppressing resprouting, especially on red alder trees. Laboratory and field trials have been conducted to evaluate the ability of C. purpureum to colonize tanoak and California bay laurel stumps. Early results indicate that C. purpureum can colonize tanoak stumps and inhibit resprouting, while sprayed herbicide is still the most effective treatment for bay laurel.
Article
Plant Sciences
Jun-Jun Liu, Arezoo Zamany, Charlie Cartwright, Yu Xiang, Simon F. Shamoun, Benjamin Rancourt
Summary: This study investigates the molecular defense mechanisms and genetic components of western hemlock resistance against Annosus root and butt rot disease. The study finds that QR seedlings exhibit coordinated defense against biotic stressors, while Sus seedlings show defense responses to abiotic stimuli. Furthermore, genetic variations in defense-related genes are identified.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Forestry
Rachel K. Brooks, Daniel Omdal, Samuel Brown, Collin J. Marshall, Joseph M. Hulbert, Marianne Elliott, Gary Chastagner
Summary: The recent discovery of the invasive fungus Cryptostroma corticale in Seattle, Washington, USA is concerning due to its potential impact on both trees and human health. The fungus, which causes sooty bark disease, has been found to be well-distributed throughout western Washington, with a high detection rate in mature bigleaf maple trees. Although signs of the disease were rarely observed on individual trees, the overall condition of the bigleaf maples surveyed was considered healthy. Increased awareness of this fungus and the disease it causes can inform management strategies and highlight the need for further research.