Black Leg and Chlorotic Leaf Spot Occurrence on Brassicaceae Crop and Weed Hosts

Autor:	Briana J. Claassen, Pete A. Berry, Cynthia M. Ocamb, Carol A. Mallory-Smith, William J. Thomas
Rok vydání:	2021
Předmět:	Crops Agricultural Washington biology fungi Pyrenopeziza brassicae food and beverages Brassicaceae Plant Science biology.organism_classification Crop Oregon Agronomy Leptosphaeria maculans Leaf spot Weed Agronomy and Crop Science Plant Diseases
Zdroj:	Plant Disease. 105:3418-3425
ISSN:	1943-7692 0191-2917
DOI:	10.1094/pdis-03-21-0665-re
Popis:	Black leg (caused by Plenodomus lingam and P. biglobosus) and chlorotic leaf spot (caused by Pyrenopeziza brassicae) are economically important fungal diseases of Brassicaceae crops. Surveys of seed fields and weed hosts were conducted to understand the distribution and prevalence of these diseases in Oregon after black leg and chlorotic leaf spot outbreaks occurred in Brassicaceae crops in 2014. Postharvest black leg ratings were conducted in seed fields of canola, forage rape, and turnip in 2015 and 2016. The incidence of black leg was greater for turnip (51%) than for canola (29%) and forage rape (25%). The overall average disease incidence was greater for seed crops harvested in 2015 (46%) than for crops harvested in 2016 (28%). A disease survey of wild Brassicaceae plants was conducted along Interstate 5 in Oregon. Brassicaceae weed population sites were identified and 40 sites were sampled for these diseases. Black leg and chlorotic leaf spot were present in 60 and 45%, respectively, of the sampled sites. Both species of Plenodomus were detected in weed populations, with P. lingam being the predominant species recovered (95%). The northernmost sample site with black leg was
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89cab202fc2f5c6bc084a75b437be6e3 https://doi.org/10.1094/pdis-03-21-0665-re Zobrazit plný text záznamu