Publications

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results of a nationwide survey to determine feedstuffs fed to lactating dairy cows.a nationwide survey to determine feedstuffs used in the diets of dairy cows was conducted. this survey was mailed to dairy nutritionists at universities in each state to describe the use of 144 feedstuffs. twenty-eight states responded and were grouped by region as follows: northeast (maine, maryland, new hampshire, new york, ohio, vermont, and west virginia), northwest (idaho, oregon, and washington), midwest (iowa, illinois, michigan, minnesota, missouri, nebraska, north dakota, south dakota, ...199910068966
puzzling industry response to prodigene fiasco. 200312511893
effect of environment on resistance to the european corn borer (lepidoptera: crambidae) in maize.the european corn borer, ostrinia nubilalis (hübner) (lepidoptera: crambidae), is a major pest of maize, zea mays l., in many temperate parts of the world. genotype-by-environment interaction effects can make relative performance unpredictable and may hamper selection for resistance to european corn borer. the objective of this study was to determine the effect of environment on genotypic reaction to european corn borer resistance in maize. a set of 12 maize inbred lines was chosen to represent ...200415568368
predicting unsaturated zone nitrogen mass balances in agricultural settings of the united states.unsaturated zone n fate and transport were evaluated at four sites to identify the predominant pathways of n cycling: an almond [prunus dulcis (mill.) d.a. webb] orchard and cornfield (zea mays l.) in the lower merced river study basin, california; and corn-soybean [glycine max (l.) merr.] rotations in study basins at maple creek, nebraska, and at morgan creek, maryland. we used inverse modeling with a new version of the root zone water quality model (rzwqm2) to estimate soil hydraulic and nitro ...201020400601
detection and characterization of xanthomonas vasicola pv. vasculorum (cobb 1894) comb. nov. causing bacterial leaf streak of corn in the united states.bacterial leaf streak of corn (zea mays) recently reached epidemic levels in three corn-growing states, and has been detected in another six states in the central united states. xanthomonas vasicola was identified as the causal agent of this disease. a multi-locus sequence alignment (mlsa) of six housekeeping genes and comparison of average nucleotide identity (ani) from draft genome sequence were used to confirm phylogenetic relationships and classification of this bacterium relative to other x ...201728677478
herbicide loading to shallow ground water beneath nebraska's management systems evaluation area.better management practices can counter deterioration of ground water quality. from 1991 through 1996 the influence of improved irrigation practices on ground water pesticide contamination was assessed at the nebraska management systems evaluation area. three 13.4-ha corn (zea mays l.) fields were studied: a conventional furrow-irrigated field, a surge-irrigated field and a center pivot-irrigated field, and a center pivot-irrigated alfalfa (medicago sativa l.) field. the corn fields received one ...200612549546
long-term response of groundwater nitrate concentrations to management regulations in nebraska's central platte valley.the impact of 16 years (1988-2003) of management practices on high groundwater nitrate concentrations in nebraska's central platte river valley was assessed in a 58,812-ha (145,215-ac) groundwater quality management area intensively cropped to irrigated corn (zea mays l.). crop production and groundwater nitrate data were obtained from approximately 23,800 producer reports. the terrace, comprising approximately 56% of the study area, is much more intensively cropped to irrigated corn than the bo ...201020191240
diel patterns of colaspis brunnea and colaspis crinicornis (coleoptera: chrysomelidae) in southeastern nebraska.a field study was conducted to increase our understanding of diel activity patterns of colaspis brunnea (f.) and colaspis crinicornis schaeffer (coleoptera: chrysomelidae) in key crop habitats. within 24-h periods, c. brunnea was sampled in clover fields (primarily red clover, trifolium pretense (l.), with some sweet clover, melilotus officinalis (l.) pallas, and downy brome, bromus tectorum (l.)) and soybean, glycine max (l.) merrill, fields, using a sweep-net, while whole-plant-count sampling ...201526314034
frequency and distribution of extended diapause in nebraska populations of diabrotica barberi (coleoptera: chrysomelidae).the frequency of extended diapause in populations of the northern corn rootworm, diabrotica barberi smith & lawrence (coleoptera: chrysomelidae), was measured in eastern nebraska. adult collections were made during late summer in 2008 and 2009 from eight sites each year (seven sites were consistent over years). eggs were obtained from 12 to 20 females per site and were held on moist soil under appropriate temperature profiles to facilitate egg survival, diapause development, and diapause termina ...201324020274
characterization of the agent of "high plains disease": mass spectrometry determines the sequence of the disease-specific protein.the "32-kda" protein specifically associated with high plains disease was characterized by time-of-flight mass spectrometry, after the agent had been isolated in pure culture by "vascular puncture inoculation," a novel mechanical means of transmission. two isolates from different geographic locations each consisted of a mixture of subpopulations that were highly homologous to an amino acid sequence derived from a nucleotide sequence (u60141) deposited in genbank trade mark by the nebraska group ...200414561770
influence of calcareous soil on cry3bb1 expression and efficacy in the field.greater than expected injury by western corn rootworm (wcr) (diabrotica virgifera virgifera leconte) to cry3bb1 expressing maize hybrids (zea mays l.) has been reported in southwestern nebraska. affected areas of some fields are often associated with high ph calcareous soils where maize growth is poor and iron chlorosis is common. as part of a comprehensive study to understand potential causes of unexpected injury, experiments were conducted during 2013 and 2014 to ascertain whether the calcareo ...201728326506
western bean cutworm survival and the development of economic injury levels and economic thresholds in field corn.western bean cutworm, striacosta albicosta (smith) (lepidoptera: noctuidae), is a native pest of dry beans (phaseolus vulgaris l.) and corn (zea mays l.). historically, the western bean cutworm was distributed in the western united states, but since 1999 eastward expansion has been observed. in corn, economic impact is caused by larval ear feeding. information on western bean cutworm biology, ecology, and economic impact is relatively limited, and the development of economic injury levels (eils) ...201323865192
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