A5021121106- Weed Control and Herbicide Applications
- Agronomic Practices and Intercropping Systems
- Plant and animal studies
- Remote Sensing in Agriculture
- Turfgrass Adaptation and Management
- Soil Carbon and Nitrogen Dynamics
- Rangeland and Wildlife Management
- Crop Yield and Soil Fertility
- Ruminant Nutrition and Digestive Physiology
- Water Quality Monitoring and Analysis
- Bioenergy crop production and management
- Spectroscopy and Chemometric Analyses
- Insect Resistance and Genetics
- Nematode management and characterization studies
- Biological Control of Invasive Species
- Legume Nitrogen Fixing Symbiosis
- Soybean genetics and cultivation
- Banana Cultivation and Research
- Insect and Arachnid Ecology and Behavior
- Pesticide and Herbicide Environmental Studies
- Insect-Plant Interactions and Control
- Agriculture, Plant Science, Crop Management
Bayer (United States)
2019
Oklahoma State University
1994-2009
Purdue University West Lafayette
2004-2006
Oklahoma State University Oklahoma City
2005
Mississippi State University
2000-2001
The objective of this research was to evaluate the accuracy remote sensing for detecting weed infestation levels during early-season Glycine max production. Weed population estimates were collected from two G. fields approximately 8 wk after planting summer 1998. Seedling populations sampled using a regular grid coordinate system on 10- by 10-m grid. Two days later, multispectral digital images recorded. Generally, infestations Senna obtusifolia, Ipomoea lacunosa, and Solanum carolinense...
The objective of this research was to assess the accuracy remote sensing for detecting weed species in soybean based on two primary criteria: presence or absence weeds and identification individual species. Treatments included (giant foxtail velvetleaf) grown monoculture interseeded with soybean, bare ground, weed-free soybean. Aerial multispectral digital images were collected at near canopy closure from field sites 2001. Weedy pixels (1.3 m 2 ) separated ground no more than 11% error,...
Feral rye, commonly referred to as cereal, winter, common, or volunteer is an important weed in winter wheat production many parts of the United States and world. rye reduces net profits by more than $27 million due lower grain yields, increased dockage, reduced land values. To date, limited research has been conducted on components that make feral a problem various cropping systems. Herbicide-tolerant technology can be used manage but current efficacy levels are not adequate for high...
Weed population estimates were collected from four Glycine max fields during the summers of 1997 and 1998. Seedling weed populations sampled using a regular coordinate system on grid either 50 by 50, 30 30, or 10 m. MSU-HERB Mississippi Herbicide Application Decision Support System (HADSS) (yield loss prediction herbicide recommendation models for G. max) used to determine estimated net gain resulting simulated applications at each sample location in field. When necessary, appropriate data...
Field experiments were conducted in Oklahoma to quantify the wheat grain yield losses and price discounts resulting from season-long interference with cheat, feral rye, Italian ryegrass, jointed goatgrass, wild oat. Plots seeded individual weeds at one of seven seeding rates, was planted all plots a uniform rate. Maximum weed densities 89 (cheat), 80 (feral rye), 158 (Italian ryegrass), 170 (jointed goatgrass), 120 plants/m 2 (wild oat). Wheat caused by maximum density each species 19 55 20...
An understanding of environmental factors governing patchy weed distribution in fields could prove to be a valuable tool management. The objectives this research were investigate the relationships between patterns and properties two Mississippi soybean construct models based on those predict distribution. Two months before planting, soil sampled 60- by 60-m coordinate grid, samples analyzed for calcium, magnesium, potassium, sodium, phosphorus, zinc, cation exchange capacity, percent organic...
Studies were conducted in 2001 and 2002 to determine the effect of POST herbicides on spectral reflectance corn. corn evaluated included 2,4-D, atrazine, bromoxynil, dicamba + diflufenzopyr, nicosulfuron, primisulfuron. Multispectral hyperspectral data collected properties analyzed using SAS procedures MultiSpec image analysis. Corn treated with applications atrazine primisulfuron could not be distinguished from nontreated regardless type or analysis method used. 2,4-D diflufenzopyr most...
Herbicide-resistant corn hybrids offer additional options for POST weed control in corn, and growers may benefit from information on the consistency of these weed-control strategies. Studies were conducted Indiana, Illinois, Michigan, Ohio, 2000 2001, to evaluate among herbicide strategies imidazolinone-resistant, glufosinate-resistant, glyphosate-resistant, conventional corn. Isogenic utilized minimize variation growth yield potential hybrids. The glyphosate-resistant postemergence...
Field studies were conducted in 2000 and 2001 to evaluate corn yield-loss predictions generated by WeedSOFT, a computerized weed management decision aid. Conventional tillage practices used produce 76-cm rows Illinois, Indiana, Kansas, Michigan, Missouri, Nebraska, Wisconsin. A total of 21 site-years from these seven states evaluated this study. At 4 wk after planting, densities size, crop-growth stage, estimated weed-free yield, environmental conditions at the time application entered into...
Abstract Herbicides have been a primary means of managing undesirable brush on grazing lands across the southwestern United States for decades. Continued encroachment honey mesquite and huisache warrants evaluation treatment life economics current experimental treatments. Treatment is defined as time between application when canopy cover returns to competitive level with native forage grasses (i.e., 25% 30% huisache). industry-standard herbicides was compared that aminocyclopyrachlor plus...
Experiments were conducted near Duke and Forgan, OK, on land enrolled in the Conservation Reserve program (CRP) that had been seeded to Old World bluestem (OWB) evaluate tillage systems for returning CRP grassland winter wheat production. Glyphosate controlled OWB 72% or less no-till (NT) wheat. Disk (DT) moldboard plow (MPT) seedbed preparation 87 99%, respectively, at Forgan 96 100%, Duke. At control NT was higher when glyphosate applied July than May. Soil water content a depth of 120 cm...