The numbers of greenbugs, Schizaphis graminum (Rondani), and bird cherry-oat aphids, Rhopalosiphum padi L., per wheat tiller (stem) were estimated in 189 production winter wheat (Triticum aestivum L.) fields located throughout Oklahoma. Taylor's power law regressions were calculated from these data and used to construct fixed precision sequential sampling schemes for each species. An evaluation...

Abstract The objective of this work was to evaluate the effects winter crops and soybean management systems on Pratylenchus brachyurus Helicotylenchus dihystera populations, in a naturally infested site, south-central region state Paraná, Brazil. experiment carried out during two crop years (2017/2018 2018/2019). Barley or black oat (winter crops) (summer crop) were treated with chemical biolog...

The crown is the below ground portion of the stem of a grass which contains meristematic cells that give rise to new shoots and roots following winter. To better understand mechanisms of survival from freezing, a histological analysis was performed on rye, wheat, barley and oat plants that had been frozen, thawed and allowed to resume growth under controlled conditions. Extensive tissue disrupt...

In spite of the economic importance of powdery mildew on cucurbits, literature and databases about the fungal species reveal different species numbers and names, often indicating only two species, with inconsistent host specificities for different members of Cucurbitaceae. Revision of the available literature indicates the presence of at least six species of powdery mildews on Cucurbitaceae wit...

Abstract Wild oat is a herbicide resistance-prone global weed species that causes significant economic losses in dryland and horticultural agriculture. As result, there has been research effort to control this species. A major impediment the seed coat-mediated dormancy of wild oat, which requires labor-intensive incision or puncturing coat initiate germination. This study defines most efficient...

Preservation and use of wild oat species germplasm are essential for further improvement of cultivated oats. We analyzed the transferability and utility of cultivated (white) oat Avena sativa (AACCDD genome) microsatellite markers for genetic studies of black oat A. strigosa (A(s)A(s) genome) genotypes. The DNA of each black oat genotype was extracted from young leaves and amplified by PCR usin...

Abstract This study tested the effect of oat catch crops on mineral nitrogen (N) leaching losses from cool season fodder beet grazing. Undisturbed soil monolith lysimeters were collected two grassland sites with soils featuring contrasting texture and water holding capacity (WHC) characteristics. After simulated grazing in late autumn or winter, synthetic dairy cow urine was applied. Nitrogen m...

The water-insoluble storage proteins of cereals (prolamins) are called "gluten" in wheat, barley, and rye, and "avenins" in oat. Gluten can provoke celiac disease (CD) in genetically susceptible individuals (those with human leukocyte antigen (HLA)-DQ2 or HLA-DQ8 serotypes). Avenins are present at a lower concentration (10%-15% of total protein content) in oat as compared to gluten in wheat (80...