OatRust Control: TreatingOatsWithCrownRust.Unfortunately, oatcrownrusttreatment has a long way to go. The most effective method for controlling crownrust is to plant resistant varieties. Even that isn’t always completely effective at eliminating the disease. YIELD LOSS: Crownrust is the most widespread and damaging disease of oat. There have been severe epidemics in virtually every oat-growing region of the world. Moderate to severe epidemics can reduce grain yield by 10 to 40%. Crownrust on oats. Questions about this information?Oats are susceptible to a variety of plant diseases including fungal, viral and bacterial pathogens. The most common disease with economic significance is crownrust, also known as leaf rust. Crownrust, caused by Puccinia coronata f. sp. avenae (Pca), is a significant impediment to global oat production. Some 98 alleles at 92 loci conferring resistance to Pca in Avena have been designated; however, allelic relationships and chromosomal locations of many of these are unknown. The crownrust fungus is specific to cultivated oat, wild oat and a few other wild grasses, but will not infect wheat, barley or rye. Crownrust reduces oat yield and causes thin kernels with low test weight – factors that greatly reduce milling quality. Crownrust: infection risk and symptoms Crownrust: the main spore types Varietal resistance to crownrust. Crownrust is the major disease of UK oats. Learn about the pathogen, including its life cycle, the key symptoms in infected crops and varietal resistance. Crownrust is considered the most economically important disease of oat in Saskatchewan, while leaf spotting diseases are observed annually, usually at low to moderate levels. Crownrust continues to be the most economically damaging and important fungal diseases of oats in South Dakota. Learn how to recognize and manage it in oat fields this growing season. Oatcrownrust damages the oat leaves, causing up to 40 per cent yield losses. Tenuta says, “The higher up on the plant where the damage occurs, particularly when the disease starts getting into the flag leaf, the greater the potential yield impact. Also known as leaf rust, crownrust can infect cultivated oat, wild oat and a few wild grasses, but won’t infect cereals like wheat, barley or rye. Its name comes from one of its spore types — a teliospore — which is characterized by prongs that create a crown-like structure. In susceptible oat cultivars, this disease can cause grain yield losses of weight measured in fungicide-treated plots. These re- sults suggested that selection combining partial resis- up to 30% (Endo and Boewe, 1958; Frey et al., 1973). tance to crownrust with grain yield and seed... Crownrust is the most widespread and damaging disease found in oats. For individual growers, oatswithcrownrust can result in a total crop loss. Click here to learn more about control and treatment of oatrust. Crownrust (Puccinia coronata Corda f. sp. avenae Eriks.) negatively impacts seed quality and yield in oat (Avena sativa L.) in rust-prone areas of eastern Saskatchewan, Manitoba, Ontario, and Quebec. Genetic resistance is the primary means for controlling this disease, but early seeding... This study was con-ducted to investigate the genetic relationships of crownrust resistance, grain yield, test weight, and seed weight under both inoculated and fungicide-treated conditions. A Design II mating was performed be-tween 10 oat lines with putative partial resistance to crown...
