The 1938 wheat leaf rust epiphytotic in Oklahoma
Read Online
Share

The 1938 wheat leaf rust epiphytotic in Oklahoma

  • 822 Want to read
  • ·
  • 66 Currently reading

Published by Division of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture in [Washington, D.C.] .
Written in English

Subjects:

  • Wheat,
  • Leaf rust of wheat,
  • Diseases and pests

Book details:

Edition Notes

Statementby K. Starr Chester
SeriesPlant disease reporter -- suppl. 112, Plant disease reporter -- suppl. 112.
ContributionsUnited States. Division of Mycology and Disease Survey
The Physical Object
Pagination18 p. [1] leaf of plates :
Number of Pages18
ID Numbers
Open LibraryOL25612063M
OCLC/WorldCa871319546

Download The 1938 wheat leaf rust epiphytotic in Oklahoma

PDF EPUB FB2 MOBI RTF

Identification and Control of Leaf Rust of Wheat in Georgia Figure 1. Micrographs of urediniospores (a) and germinating urediniospores (b) of. Puccinia triticina, the causal agent of wheat leaf rust. (Photos: Alfredo Martinez, James Buck; taken using 40X and X objectives.) Wheat leaf rust, caused by the fungus. Puccinia triticina (formerly. Figure 3. Stem rust on wheat stems and leaves. Figure 4. Close-up of stem rust on the lower surface of a wheat leaf. Figure 2. Pathway (arrow) of wind-borne rust spores during the wheat growing season (April to June) in the Great Plains states. Figure 5. Stem rust on a wheat Size: 1MB.   Leaf rust is the most common of the three diseases in the Central Great Plains and other wheat-growing regions in the United States. In some states, leaf rust disease occurs every year. Stem rust is not typically as prevalent as other rusts because many varieties are now resistant to the disease. Leaf rust pustules (uredinia) appear on wheat leaf surfaces and leaf sheaths (Figure 1). The pustules produce an abundance of orange-colored spores (urediniospores), which cause heavily infected fields to appear orange or yellow from a distance. Wheat leaf rust persists in Oklahoma primarily in the ure-diniospore stage, which is a repeating stage.

2. Control of volunteer wheat and seeding dates. 3. The use of fungicide sprays. Wheat Leaf Rust Resistance Genes. Leaf rust resistance gene postulation in current U.S. wheat cultivars. Selected References: Browder, L. E., Leaf, Stem, and Stripe Rust. Diseases of Wheat. Guide A Mark A. Marsalis and Natalie P. Goldberg. 1. Introduction. Rust diseases of wheat are among the oldest plant diseas-es known to humans. Early literature on wheat cultiva-tion mentions these devastating diseases and their ability to destroy entire wheat crops. Since rust discovery, nu-File Size: 2MB. Yellow rust, or stripe rust, takes its name from the appearance of yellow-colored stripes produced parallel along the venations of each leaf blade. These yellow stripes are actually characteristic of uredinia that produce yellow colored y hosts of yellow rust of wheat are Triticum aestivum (bread wheat), Triticum turgidum (durum wheat), triticale, and a few Class: Urediniomycetes. Diagnosing leaf rust of wheat Leaf rust (Puccinia triticina) is a fungal leaf disease specific to wheat that can pose a significant threat to the yield and quality of Western Australian wheat crops in some seasons, causing up to 30% yield loss in susceptible varieties.

There are three different rust diseases that affect wheat—leaf rust (also known as brown rust or orange rust), stripe rust (commonly known as yellow rust), and stem rust (commonly referred to as black rust of black stem rust). Of these, leaf rust is the most frequently occurring in Ohio, but in any given year, any of these diseases can infect and cause substantial yield losses if not. Leaf Rust In Wheat, Barley, And Oats. Rust has the potential to be a serious threat to all small grains. Leaf rust can cause up to 25% yield loss under favourable conditions. Leaf rust in oats is commonly referred to as crown rust. Host Crops. Wheat, barley and oats. Biology. Leaf rust overwinters in the southern USA and is blown into the. The best way to control leaf rust is to grow resistant varieties. In most parts of Victoria leaf rust has been effectively controlled because of the widespread use of wheat varieties with resistance to this disease. However, leaf rust occasionally produces new races which are capable of attacking varieties that were resistant when. If a highly susceptible variety was planted, leaf rust is severe on leaves below the flag leaf, conditions are favorable for continued leaf rust development, the yield potential of the field is high (more than 35 bu/ac), and the price of wheat is high ($/bu), then applying a fungicide to limit losses from leaf rust should be considered.