منابع مشابه
Demonstration of pathotype specificity in stem rust of perennial ryegrass.
Rust diseases cause significant damage in forage and seed crops of perennial ryegrass (Lolium perenne), which is highly heterozygous and heterogeneous and thus presents difficulty in genetic analysis. There has been no definitive demonstration of the existence of pathotypes for stem rust or other rusts of perennial ryegrass, although experiments with crown rust (Puccinia coronata) of this host ...
متن کاملRust-Enhanced Allelopathy of Perennial Ryegrass against White Clover
Connolly, 1990). Crown rust is the most serious ryegrass fungal pathogen in these areas (Eagling and Clark, 1993), Perennial ryegrass (Lolium perenne L.) and white clover (Trifowith epidemics regularly occurring between spring and lium repens L.) are important pasture components in the higher rainfall areas of southeastern Australia. Crown rust (Puccinia coronata autumn. A preliminary study dem...
متن کاملA damage function for stem rust of perennial ryegrass seed crops.
Observations of naturally occurring stem rust epidemics and seed yields in perennial ryegrass were taken in 19 field experiments conducted over the course of 9 years. Epidemic severity differed among years and also among experimental treatments (fungicide regimes) within years. In each experiment, attainable yield was represented by the nondiseased treatment, and yields of other treatments were...
متن کاملStem rust in perennial ryegrass seed crops: epidemiological and genetic research at USDA-ARS
In production of perennial ryegrass seed in the Northwest USA, stem rust is the primary disease constraint in terms of management cost and potential yield loss. The USDA-ARS research program on this problem is focused on improved decision making for fungicide use, and tools for genetic improvement. Data from 10 years of field and greenhouse research was used to construct an epidemiological mode...
متن کاملEquilibrium Onions ?
– We demonstrate the possibility of a stable equilibrium multi-lamellar (“onion”) phase in pure lamellar systems (no excess solvent) due to a sufficiently negative Gaussian curvature modulus. The onion phase is stabilized by non-linear elastic moduli coupled to a polydisperse size distribution (Apollonian packing) to allow space-filling without appreciable elastic distortion. This model is comp...
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ژورنال
عنوان ژورنال: Vegetable crops of Russia
سال: 2016
ISSN: 2072-9146
DOI: 10.18619/2072-9146-2016-2-86-89