Results 101 to 110 of about 265 (133)
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An assessment of environmental conditions for control of downy brome by Pseudomonas fluorescens D7
International Journal of Environmental Technology and Management, 2010Purpose: We evaluated the conditions that favoured Pseudomonas fluorescens strain D7 (P.f. D7) growth and inhibition of downy brome. Design/methodology/approach: Tn5 mutagenesis and a competitive assay were used to isolate mutants of P.f. D7. Isolates were screened for polysaccharide production and toxin response.
Ann C Kennedy, A Mark Ibekwe
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Efficacy of downy brome herbicides as influenced by soil properties
Canadian Journal of Plant Science, 1994Controlled environment experiments were conducted to determine the effect of various edaphic factors on the efficacy of metribuzin, BAY SMY 1500, cinmethylin, and napropamide to control downy brome (Bromus tectorum L.). Experiment 1 determined the effects of soil organic matter, pH and texture and experiment 2 determined the effect of soil water ...
J R Moyer, G C Kozub, R E Blackshaw
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Ecology and ecological genetics of seed dormancy in downy brome
Weed Science, 2002Abstract Downy brome, an obligately selfing winter annual, has invaded a variety of habitats in western North America. Seeds are at least conditionally dormant at dispersal in early summer and lose dormancy through dry after-ripening. In the field, patterns of germination response at dispersal vary among populations and across years within populations.
Phil S. Allen, Susan E. Meyer
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Effect of the Bioherbicide Pseudomonas fluorescens D7 on Downy Brome (Bromus tectorum)
Rangeland Ecology and Management, 2020Downy brome (Bromus tectorum) is one of the most problematic invasive plant species in the United States. Downy brome invasions are associated with reductions in diversity and an increase in fire intensity. Bioherbicides that are reported to effectively control downy brome have been developed.
Daniel Tekiela
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Competition Between Winter Wheat and Downy Brome
Weed Science, 1974Four experiments were conducted to develop controls for downy brome (Bromus tectorum L.) in winter wheat (Triticum aestivum L. ‘Gaines’). In three experiments downy brome was removed at monthly intervals from emergence to harvest. In the third and fourth experiments, hand weeded and weedy controls were compared to chemical control with R11913 (3 ...
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Resistance to chlortoluron in a downy brome (Bromus tectorum) biotype
Weed Science, 2006A downy brome population in a winter wheat field at Córdoba, Spain, survived use rates of chlortoluron (2.5 to 3.5 kg ai ha−1) over 2 consecutive yr, where wheat monoculture and multiple annual chlortoluron applications had been carried out. The resistant (CR) biotype showed a higher ED50value (7.4 kg ai ha−1; the concentration required for 50 ...
Julio Menendez +2 more
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Suppression of Downy Brome Growth by a Rhizobacterium in Controlled Environments
Soil Science Society of America Journal, 1993Abstract Plant‐suppressive rhizobacteria have the potential to be used as biological control agents to combat weeds. Pseudomonas fluorescens strain D7 (D7) was introduced to downy brome ( Bromus tectorum L.) seeds to determine the ...
B. N. Johnson, A. C. Kennedy, A. G. Ogg
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Host range of a deleterious rhizobacterium for biological control of downy brome
Weed Science, 2001Abstract Pseudomonas fluorescens strain D7 (P. f. D7; NRRL B-18293) is a root-colonizing bacterium that inhibits downy brome (Bromus tectorum L. BROTE) growth. Before commercialization as a biological control agent, strain D7 must be tested for host plant specificity.
Ann C. Kennedy +2 more
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High Phenotypic and Molecular Variation in Downy Brome (Bromus tectorum)
Invasive Plant Science and Management, 2008Abstract The invasive grass Bromus tectorum (cheatgrass, downy brome) has extensive ecological breadth in its introduced range, and is increasing in abundance at high elevations. As a predominantly selfing species with high potential population growth rates, it is a likely candidate for having general-purpose genotypes that facilitate its invasion into
Rebecca H. Kao +2 more
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Weed Technology, 1999
The genusBromusin the Poaceae includes 100 species of annuals, biennials, and perennials. Several species are important as forage crops while others are grown as ornamentals. It is distributed in the temperate areas and in tropical mountainous regions (Hyam and Parkhurst 1995).Bromus tectorumL., downy brome, an introduced annual, occurs throughout most
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The genusBromusin the Poaceae includes 100 species of annuals, biennials, and perennials. Several species are important as forage crops while others are grown as ornamentals. It is distributed in the temperate areas and in tropical mountainous regions (Hyam and Parkhurst 1995).Bromus tectorumL., downy brome, an introduced annual, occurs throughout most
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