| the location of genes governing long first internode of corn. | knowing breeding behavior and cytological location of traits helps breeders. my objective was to locate dominant genes for long first internode of corn (zea mays l.). i determined that hopi indian corn pi213733 (variety komona) displayed the trait and grew well in the u.s. corn belt. i crossed pi213733 to 26 translocation tester stocks in minnesota inbred a188 background, backcrossed semi-sterile plants carrying the translocation to a188 the next generation, and grew the segregating generation p ... | 1997 | 9093865 |
| 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, ... | 1999 | 10068966 |
| cover cropping to reduce nitrate loss through subsurface drainage in the northern u.s. corn belt. | despite the use of best management practices for nitrogen (n) application rate and timing, significant losses of nitrate nitrogen (no3(-)-n) in drainage discharge continue to occur from row crop cropping systems. our objective was to determine whether a autumn-seeded winter rye (secale cereale l.) cover crop following corn (zea mays l.) would reduce no3(-)-n losses through subsurface tile drainage in a corn-soybean [glycine mar (l.) merr.] cropping system in the northern corn belt (usa) in a mod ... | 2004 | 15224938 |
| increasing corn for biofuel production reduces biocontrol services in agricultural landscapes. | increased demand for corn grain as an ethanol feedstock is altering u.s. agricultural landscapes and the ecosystem services they provide. from 2006 to 2007, corn acreage increased 19% nationally, resulting in reduced crop diversity in many areas. biological control of insects is an ecosystem service that is strongly influenced by local landscape structure. here, we estimate the value of natural biological control of the soybean aphid, a major pest in agricultural landscapes, and the economic imp ... | 2008 | 19075234 |
| optimizing helicoverpa zea (lepidoptera: noctuidae) insecticidal efficacy in minnesota sweet corn: a logistic regression to assess timing parameters. | late-season plantings of sweet corn in minnesota result in an abundant supply of silking corn, zea mays l., throughout august to early september that is highly attractive to the corn earworm, helicoverpa zea (boddie) (lepidoptera: noctuidae). during a 10-yr period, 1997-2006, insecticide efficacy trials were conducted in late-planted sweet corn in minnesota for management of h. zea. these data were used to develop a logistic regression model to identify the variables and interactions that most i ... | 2009 | 19449649 |
| planting patterns of in-field refuges observed for bt maize in minnesota. | the u.s. environmental protection agency (usepa) requires the use of nontransgenic refuges to slow the evolution of insect resistance to transgenic crops. in-field refuges, or refuges that are planted within the same field as the transgenic crop, are allowed; however, these refuges are required to be at least four rows wide. we described in-field planting patterns used by growers for both crylab [against ostrinia nubilalis (hübner)] and cry3bb (against diabrotica virgifera virgifera leconte) mai ... | 2010 | 20857753 |
| 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 ... | 2010 | 21043271 |
| cross-pollination of nontransgenic corn ears with transgenic bt corn: efficacy against lepidopteran pests and implications for resistance management. | the efficacy of nontransgenic sweet corn, zea mays l., hybrids cross-pollinated by bacillus thuringiensis (bt) sweet corn hybrids expressing cry1ab toxin was evaluated in both field and laboratory studies in minnesota in 2000. non-bt and bt hybrids (maternal plants) were cross-pollinated with pollen from both non-bt and bt hybrids (paternal plants) to create four crosses. subsequent crosses were evaluated for efficacy in the field against european corn borer, ostrinia nubilalis (hübner), and cor ... | 2011 | 22066174 |
| flowering dynamics and pollinator visitation of oilseed echium (echium plantagineum). | echium (echium plantagineum l.) is an alternative oilseed crop in summer-wet temperate regions that provides floral resources to pollinators. its seed oil is rich in omega-3 fatty acids, such as stearidonic acid, which is desired highly by the cosmetic industry. seeds were sown in field plots over three years in western minnesota in spring (early-sown) or early summer (late-sown), and flower abundance, pollinator visitation, and seed yields were studied. initial flowering commenced 41 to 55 d af ... | 2014 | 25427071 |
| species composition and abundance of stink bugs (hemiptera: heteroptera: pentatomidae) in minnesota field corn. | in response to concerns of increasing significance of stink bugs (hemiptera: heteroptera: pentatomidae) in northern states, a survey was conducted over 2 yr in minnesota to characterize the pentatomidae associated with field corn, zea mays l. halyomorpha halys (stål), an exotic species, was not detected in this survey, despite continued detection of this species as an invader of human-made structures in minnesota. five species of pentatomidae (four herbivorous; one predatory) were collected from ... | 2015 | 26313176 |
| mycotoxins and fusarium spp. associated with infected ears of corn in minnesota. | five fusarium species were isolated from the grain of dent corn (zea mays) selected from 20 of 32 damaged fields in 10 counties in minnesota on the basis of hyphal growth visible on kernels in the field. three mycotoxins were identified in the infected ears: zearalenone, deoxynivalenol, and 15-acetyl-deoxynivalenol. this is the first report of the presence of 15-acetyl-deoxynivalenol on corn ears in the field prior to harvest and in combination with deoxynivalenol and zearalenone. ninety-nine cu ... | 1988 | 2972253 |