Publications

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incidence of airborne aspergillus flavus spores in cornfields of five states.airborne aspergillus flavus spores were rarely detected throughout the 1975 growing season by the agar plate method at cornfield sites in georgia, illinois, maryland, south carolina, and virginia.1978416756
mutagenicity of municipal water obtained from an agricultural area.we have studied the mutagenicity of the water from lake bloomington and of the tap water that is made from the lake water. the lake, which is the source of drinking water for bloomington, illinois (pop. 44,000), is surrounded by land that is farmed intensively--being mainly in maize and soybeans. samples were collected monthly from may through october 1979 and concentrated 3,000x with xad-2 resin. nearly all of the lake and tap water concentrates were mutagenic in salmonella typhimurium ta98 and ...19817026225
use of four short-term tests to evaluate the mutagenicity of municipal water.some ways in which four short-term tests may be used to evaluate the mutagenicity of drinking water were explored by testing raw and treated water from lake bloomington, which serves the town of bloomington, illinois (population, 44,000). the water was collected from february 1976 to october 1977 and was concentrated by evaporation or by use of xad-2 resin. the water was tested for the ability to induce reverse mutation in a prokaryote, salmonella typhimurium; forward mutation in a mold, neurosp ...19826460874
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
estimated historical and current nitrogen balances for illinois.the midwest has large riverine exports of nitrogen (n), with the largest flux per unit area to the mississippi river system coming from iowa and illinois. we used historic and current data to estimate n inputs, outputs, and transformations for illinois where human activity (principally agriculture and associated landscape drainage) have had a dominant impact. presently, approximately 800,000 mg of n is added each year as fertilizer and another 420,000 mg is biologically fixed, primarily by soybe ...200112805881
captures of western corn rootworm (coleoptera: chrysomelidae) adults with pherocon am and vial traps in four crops in east central illinois.it is hypothesized that the long-term rotation of maize (zea mays l.) and soybean (glycine max l.) in east central illinois has caused a significant change in the ovipositional behavior of the western corn rootworm, diabrotica virgifera virgifera leconte. since the mid 1990s in east central illinois, western corn rootworm adults have been observed feeding on soybean foliage and also now use soybean fields as egg laying sites. this behavioral adaptation has greatly decreased the effectiveness of ...200312852611
maize selection passes the century mark: a unique resource for 21st century genomics.the illinois long-term selection experiment for grain protein and oil concentration in maize (zea mays) is the longest continuous genetics experiment in higher plants. a total of 103 cycles of selection have produced nine related populations that exhibit phenotypic extremes for grain composition and a host of correlated traits. the use of functional genomics tools in this unique genetic resource provides exciting opportunities not only to discover the genes that contribute to phenotypic differen ...200415231281
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
leaf axil sampling of midwest u.s. maize for mycotoxigenic fusarium fungi using pcr analysis.pcr analysis was used to detect fusarium species generically, as well as the mycotoxin-producing species f. subglutinans, f. proliferatum, and f. verticillioides in leaf axil and other maize tissues during ear fill in a multiyear study in central illinois. the frequency of fusarium detected varied from site to site and year to year. fusarium was generically detected more frequently in leaf axil material than in leaf/husk lesions. in two growing seasons, the leaf axil samples were also tested for ...200415630552
ovarian development and ovipositional preference of the western corn rootworm (coleoptera: chrysomelidae) variant in east central illinois.the rotation of maize, zea mays l., and soybean, glycine max (l.) merr., has been the traditional cultural tactic to manage the western corn rootworm, diabrotica virgifera virgifera leconte, in the corn belt. the reduced effectiveness of this rotation as a pest management tool in east central illinois, northern indiana, and southern michigan can be explained by the shift in the ovipositional behavior of the new variant of western corn rootworm. the objective of this study was to evaluate the inf ...200415154460
a protective endophyte of maize: acremonium zeae antibiotics inhibitory to aspergillus flavus and fusarium verticillioides.the maize endophyte acremonium zeae is antagonistic to kernel rotting and mycotoxin producing fungi aspergillus flavus and fusarium verticillioides in cultural tests for antagonism, and interferes with a. flavus infection and aflatoxin contamination of preharvest maize kernels. chemical studies of an organic extract from maize kernel fermentations of acremonium zeae (nrrl 13540), which displayed significant antifungal activity against aspergillus flavus and f. verticillioides, revealed that the ...200516018316
a promising biotechnical approach to pest management of diabrotica virgifera virgifera in illinois maize fields under kairomonal shielding with the new msd technique.environmentally compatible and sustainable plant protection requires novel approaches to pest management characterized by minimal emphasis on toxicants. classical toxicants traditionally dominated economic entomology for half a century. but worldwide problems with environmental pollution and with increasing resistance levels in all major pesticide classes and in many key insect species including diabrotica virgifera virgifera (d.v.v.) strongly advocate a rethinking and a change in management par ...200516628896
population dynamics of a western corn rootworm (coleoptera: chrysomelidae) variant in east central illinois commercial maize and soybean fields.three on-farm sites in iroquois county, il, each containing an adjacent 16.2-ha commercial production maize, zea mays l., and soybean, glycine max (l.) merr., field, were monitored for western corn rootworm, diabrotica virgifera virgifera leconte (coleoptera: chrysomelidae), adults from june through september 1999-2001. mean captures of d. v. virgifera adults as measured with pherocon am yellow sticky traps were significantly greater in maize than in soybean. overall mean numbers of d. v. virgif ...200717849858
selecting and evaluating native plants for region-specific phytotoxicity testing.in this study, we evaluated methodology to determine risks to terrestrial native plant species from potential herbecide drift, focusing on 1) selection of native species for testing, 2) growth of these species, and 3) variability in herbicide response among native species and compared with crop plants. native plant species were selected for initial testing on the basis of spatial analysis, which indicated that species from illinois, usa, were at potential risk for off-target effects of herbicide ...200817973566
sources of nitrate yields in the mississippi river basin.riverine nitrate n in the mississippi river leads to hypoxia in the gulf of mexico. several recent modeling studies estimated major n inputs and suggested source areas that could be targeted for conservation programs. we conducted a similar analysis with more recent and extensive data that demonstrates the importance of hydrology in controlling the percentage of net n inputs (nni) exported by rivers. the average fraction of annual riverine nitrate n export/nni ranged from 0.05 for the lower miss ...201021043271
future carbon dioxide concentration decreases canopy evapotranspiration and soil water depletion by field-grown maize.maize, in rotation with soybean, forms the largest continuous ecosystem in temperate north america, therefore changes to the biosphere-atmosphere exchange of water vapor and energy of these crops are likely to have an impact on the midwestern us climate and hydrological cycle. as a c4 crop, maize photosynthesis is already co2 -saturated at current co2 concentrations ([co2 ]) and the primary response of maize to elevated [co2 ] is decreased stomatal conductance (gs ). if maize photosynthesis is n ...201323505040
miscanthus and switchgrass production in central illinois: impacts on hydrology and inorganic nitrogen leaching.biomass crops are being promoted as environmentally favorable alternatives to fossil fuels or ethanol production from maize (zea mays l.), particularly across the corn belt of the united states. however, there are few if any empirical studies on inorganic n leaching losses from perennial grasses that are harvested on an annual basis, nor has there been empirical evaluation of the hydrologic consequences of perennial cropping systems. here we report on the results of 4 yr of field measurements of ...201321043284
long-term changes in mollisol organic carbon and nitrogen.conversions of mollisols from prairie to cropland and subsequent changes in crop production practices in the midwestern usa have resulted in changes in soil organic matter. few studies have used archived samples, long-term resampling of soils to a depth of 1 m, and space for time studies to document these changes. we resampled soils by depth (0-100 cm) in fields at 19 locations in central illinois on poorly drained mollisols that were in corn (zea mays l.) and soybean (glycine max l. merr.) rota ...201319141810
phosphorus transport through subsurface drainage and surface runoff from a flat watershed in east central illinois, usa.a long-term water quality monitoring program was established to evaluate the effects of agricultural management practices on water quality in the little vermilion river (lvr) watershed, il. this watershed has intensive random and irregular subsurface drainage systems. the objective of this study was to assess the fate and transport of soluble phosphorus (soluble p) through subsurface drainage and surface runoff. four sites (sites a, b, c, and e) that had subsurface and surface monitoring program ...201317412904
assessment of plant availability and environmental risk of biosolids-phosphorus in a u.s. midwest corn-belt soil.a field experiment was conducted from 2005 to 2008 in fulton county, western illinois with biosolids from conventional wastewater treatment applied as corn fertilizer in a series of p rates (0, 163, 325, 488, 650 kg p ha(-1)) along with commercial p fertilizer - triple superphosphate p (tsp) as reference to assess biosolids-p plant availability and potential loss to waterbodies through runoff. air-dried biosolids and tsp were incorporated into surface soil at end of 2005, and corn (zea mays) was ...201626945189
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