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Now showing items 41-60 of 173
Inheritance, fitness costs, and potential mechanisms of resistance for western corn rootworm larvae surviving Bt corn
(University of Missouri--Columbia, 2015)
The western corn rootworm, Diabrotica virgifera virgifera LeConte, has developed resistance to most control tactics used to manage it. Transgenic corn varieties that express insecticidal proteins from the bacterium Bacillus ...
Corn physiology and yield response to hybrid and seeding rate on claypan soils
(University of Missouri--Columbia, 2015)
Yield improvements over the past few decades have been attributed to increasing optimum plant population and not the increase of grain produced per plant. A goal in precision agriculture is to identify seeding rates that ...
Increased corn rotation frequency cropping system impacts on soil functional properties
(University of Missouri--Columbia, 2015)
Crop rotations including more corn have become common in the southern region of the U.S Corn Belt due to high grain production levels and economic benefits. This increase in corn adoption has raised concerns about the ...
Diversity of macroinvertebrates in tributaries of the jacks fork and current rivers, Ozark national scenic riverways, Missouri and efficacy of springfed tributaries as refugia
(University of Missouri--Columbia, 2015)
Disturbance is a dominant force shaping stream communities and recovery from disturbance requires the presence of refugia or environments where disturbance effects are lessened. In the Missouri Ozark region, groundwater-dominant ...
Glyphosate resistance : pollen movement within a common ragweed (Ambrosia artemisiifolia L.) population and herbicide release from common waterhemp (Amaranthus rudis sauer) plants
(University of Missouri--Columbia, 2011)
Common ragweed and Common waterhemp are native, summer annual weeds distributed widely throughout the United States. Both weed species have developed resistance to the broad-spectrum herbicide glyphosate. Research was ...
The semiaquatic heteroptera (Gerromorpha) of Thailand : faunistics, biogeography and phylogeography
(University of Missouri--Columbia, 2008)
Semiaquatic heteropterans (Gerromorpha) were collected from mountain streams and waterfalls and lowland ponds adjacent to the mountains were collected from 2002 to 2006. One hundred fifty-eight species representing 31 ...
Management practice effects on corn grain ethanol yield and ethanol byproduct quality
(University of Missouri--Columbia, 2010)
The Renewable Fuel Standard (RFS2) under the Energy Independence and Security Act of 2007 (EISA) currently requires the production and use of 136.08 billion liters of renewable fuels by the year 2022. A significant portion ...
Identification and management of glyphosate-resistant annual bluegrass (Poa annua L.)
(University of Missouri--Columbia, 2010)
Annual bluegrass is the most problematic weed on golf courses in the Transition Zone and Southern United States. Applications of glyphosate are common on dormant zoysiagrass to remove winter annual weeds. In 2007, a suspect ...
Evaluating the insect fauna on Missouri native wildflowers and selected cultivars
(University of Missouri--Columbia, 2010)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Insects respond to a wide variety of plant characteristics in their search for plant provided resources. There is debate as to whether native cultivated ...
Remobilization of leaf nitrogen in stockpiled tall fescue
(University of Missouri--Columbia, 2010)
Missouri's beef industry is supported by more than five million hectares of pasture containing the grass tall fescue (Lolium arundinaceum). Stockpiled (accumulated autumn growth used for winter grazing) tall fescue leaf ...
Competition and management of volunteer corn (Zea Mays L.) in corn
(University of Missouri--Columbia, 2011)
Volunteer corn (Zea mays L.) is the result of corn kernels remaining in the field following harvest and is a competitive weed in a number of subsequent crops. With widespread adoption of glyphosate-resistant (Gly-R) corn, ...
Abscisic acid: interactions with ethylene and reactive oxygen species in the regulation of root growth under water deficit
(University of Missouri--Columbia, 2011)
Abscisic acid (ABA) is involved in several responses to plant water deficits, including an important role in root growth maintenance. Studies of the ABA-deficient maize mutant viviparous 14 (vp14) showed that ABA-deficiency ...
Evaluation of agrochemical interactions and application timings in corn and soybean
(University of Missouri--Columbia, 2013)
Due to the increase in glyphosate-resistant (GR) weeds, two agrochemical companies have developed soybeans with resistance to 2,4-D and dicamba in an effort to provide growers with new options for the control of problematic ...
Genetic mapping of salt tolerance gene in soybean cultivar Fiskeby III
(University of Missouri--Columbia, 2014)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Salinity in the parts of the southern USA causes injury in soybeans. As a result many farmers prefer varieties that are tolerant to excess sodium and ...
Identification of an extracellular adenosine 5'-triphosphate receptor in Arabidopsis thaliana
(University of Missouri--Columbia, 2013)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Adenosine 5'-triphosphate (ATP) is a well-known energy currency in all organisms. However, ATP also acts as a signaling molecule when it is secreted ...
Control of amaranthus species using dicamba as a pre- and post-herbicide in Missouri
(University of Missouri--Columbia, 2013)
The auxinic herbicide dicamba has been used traditionally as a selective post emergent (POST) herbicide for control of broadleaf weeds in monocot cropping systems. Dicamba resistance is an emerging technology that will ...
Emergence pattern of Amaranthus spp. and impact on growth and reproduction
(University of Missouri--Columbia, 2015)
Amaranthus species such as common waterhemp (Amaranthus rudis) and Palmer amaranth (A. palmeri) are troublesome annual weeds in cropping systems throughout the Midwest. Seedlings can emerge throughout the growing season ...
Role of oxalate oxidase and apoplastic reactive oxygen species in root growth regulation in water-stressed maize primary roots
(University of Missouri--Columbia, 2012)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Previous work on maize primary roots under water stress showed that cell elongation is maintained in the apical region of the growth zone but progressively ...
Effects of magnetic field exposure on seed and vegetative cutting propagation of select woody species
(University of Missouri--Columbia, 2012)
A study was conducted to determine the effects of a 1.3 mT magnetic field on germination of pin and northern red oak acorns and on IBA-banded and etiolated vegetative cuttings of apple, Chinese chestnut, and black walnut. ...
Differences in seedling vigor among diverse cotton genotypes
(University of Missouri--Columbia, 2011)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Stand establishment and early vigor are critical to the successful production of cotton. However, there is a lack of information on the genetics and ...