A5018334408- Soybean genetics and cultivation
- Plant Pathogens and Fungal Diseases
- Plant Pathogens and Resistance
- Legume Nitrogen Fixing Symbiosis
- Nematode management and characterization studies
- Plant Disease Management Techniques
- Plant pathogens and resistance mechanisms
- Plant Disease Resistance and Genetics
- Yeasts and Rust Fungi Studies
- Agronomic Practices and Intercropping Systems
- Plant-Microbe Interactions and Immunity
- Remote Sensing in Agriculture
- Plant and Fungal Interactions Research
- Spectroscopy and Chemometric Analyses
- Fungal Plant Pathogen Control
- Plant Virus Research Studies
- Cassava research and cyanide
- Plant Growth and Agriculture Techniques
- Turfgrass Adaptation and Management
- Insect-Plant Interactions and Control
- Mycorrhizal Fungi and Plant Interactions
- Silicon Effects in Agriculture
- Agricultural pest management studies
- Peanut Plant Research Studies
- Plant responses to elevated CO2
University of Arkansas at Fayetteville
2015-2024
Texas A&M University
2017
Michigan State University
2016
South Dakota State University
2016
University of Wisconsin–Madison
2016
United States Department of Agriculture
2011-2015
Agricultural Research Service
2015
University of Missouri
2015
Plant (United States)
2000
Marymount University
1999
A blue isolate of F. s. was obtained from roots and lower stems soybeans with sudden death syndrome (SDS) grown in 10 fields Arkansas, one field Illinois, Kentucky. The recovered plants all locations 86% sampled.(...)Of the 149 inoculated, 76.5% developed foliar symptoms similar to SDS (...)
Oomycete pathogens are commonly associated with soybean root rot and have been estimated to reduce yields in the United States by 1.5 million tons on an annual basis. Limited information exists regarding frequency diversity of oomycete species across major soybean-producing regions North America. A survey was conducted 11 states province Ontario, Canada. In 2011, 2,378 cultures were isolated from seedling roots a semiselective medium (CMA-PARPB) identified sequencing internal transcribed...
Crop disease detection with remote sensing is a challenging area that can have significant economic and environmental impact on crop management. Spectroscopic in the visible near-infrared (NIR) region has potential to detect changes due diseases. Soybean cyst nematode (SCN) sudden death syndrome (SDS) are two common soybean diseases extremely difficult early stages under mild moderate infestation levels. The objective of this research study was relate leaf reflectance conditions identify...
Soybean (Glycine max (L.) Merr.) is produced across a vast swath of North America, with the greatest concentration in Midwest. Root rot diseases and damping-off are major concern for production, primary causal agents include oomycetes fungi. In this study, we focused on examination oomycete species distribution soybean production system how environmental soil (edaphic) factors correlate community composition at early plant growth stages. Using culture-based approach, 3,418 isolates were...
High temperature stress during seed filling in controlled environments reduces soybean [ Glycine max (L.) Merrill] germination and vigor, but the effect of high field has not been determined. Seeds two cultivars (Hutcheson, maturity group [MG] V, DP4690, MG IV) were produced Kentucky, Mississippi, Arkansas, Texas 2000 to 2002. Air was monitored brown (mature) pods harvested, hand threshed, all shriveled abnormal seeds removed before determining standard vigor (accelerated‐aging germination)....
Existing crop monitoring programs determine the incidence and distribution of plant diseases pathogens assess damage caused within a production region. These have traditionally used observed or predicted disease pathogen data environmental information to prescribe management practices that minimize loss. Monitoring are especially important for crops with broad geographic can cause rapid great economic losses. Successful been developed several diseases, including downy mildew cucurbits,...
The effects of irrigation and soil water stress on Macrophomina phaseolina microsclerotial (MS) densities in the roots soybean were studied 1988, 1989, 1990. Soybean cvs. Davis Lloyd received until flowering (TAR2), after (IAR2), full season (FSI), or not at all (NI). Soil matric potentials 15- 30-cm depths recorded throughout growing used to schedule irrigation. MS determined beginning each season. Root periodically Microsclerotia present irrigated as well nonirrigated within 6 weeks...
Isolates of Cercospora sojina, causal agent frogeye leaf spot soybean (Glycine max), were collected across Alabama, Arkansas, Delaware, Illinois, Indiana, Iowa, Kentucky, Louisiana, Mississippi, Missouri, North Carolina, Ohio, Tennessee, and Virginia evaluated for quinone outside inhibitor (QoI) fungicide resistance. Collection these isolates from 14 states occurred between 2010 2017. QoI fungicide-resistant C. sojina detected in all surveyed represent a total 240 counties or parishes. In...
Disease progress of sudden death syndrome (SDS) soybean, caused by Fusarium solani, was determined in a standard susceptible cultivar, Lee 74, planted uniformly throughout the test site and 42 soybean cultivars representing maturity groups (MG) IV-VIII, 1986-1989. severity assessed weekly from middle July through first October using visual rating scale percent leaf area exhibiting foliar symptoms SDS. The disease ratings were used to calculate absolute infection rate (dy/dt) for each...
Sudden death syndrome (SDS) of soybean (Glycine max [L.] Merr.) is a soilborne disease increasing importance in high-yield environments. This study was conducted to determine which combinations soil fertility parameters and cyst nematode (Heterodera glycines Ichinoe) (SCN) second stage juvenile (J2) population levels were associated with SDS severity. Also, the effect severity on leaf nutrient content yield seed germination determined. These studies at Pine Tree Station, Colt, Crowley silt...
Charcoal rot of soybean, caused by Macrophomina phaseolina (Tassi) Goidanich, has been a problem for soybean farmers in the United States many years. However, recently its incidence and severity increased midwestern north-central states. Most management strategies, including chemical biological methods other cultural options, have ineffective controlling this disease. Furthermore, is often planted every year or monoculture. Although genetic resistance would be most sustainable control...
Forty-two soybean (Glycine max) cultivars representing maturity groups IV-VIII were evaluated for their response to sudden death syndrome (SDS), caused by Fusarium solani, over 3 yr in a field with history of the disease. Disease severity was assessed weekly from middle July through September using rating scale 0-5 where 0=0%, 1=1-10%, 2=11-30%, 3=31-70%, 4=71-90%, and 5=>90% leaf area exhibiting foliar symptoms SDS. Area under disease progress curve calculated each cultivar(.)
‘Osage’ soybean [ Glycine max (L.) Merr.] (Reg. No. CV‐495, PI 648270) was developed and released by the Arkansas Agricultural Experiment Station as a Maturity Group V conventional cultivar in March 2007. It derived from cross ‘Hartz 5545’ × ‘KS4895’ has been evaluated 130 field tests several southern states. Osage is widely adapted to areas between 33 37°N latitude high yield potential moderately protein content. Overall, when grown environments, had seed 3.2% greater than check ‘5601T’...
The role of soilborne pathogens in flood damage on soybeans, Glycine max, was examined using six genotypes representing a reputed range tolerances. Genotypes were planted single-row plots from 1996 to 1998 with treatments no flood, at emergence (3-day duration), or the fourth leaf node growth stage (7-day duration). Three four days after removing each treatment, plant stands estimated and 15 plants collected plot, weighed, rated for root discoloration. Roots assayed presence fungi other...
Pythium damping‐off and root rot of soybean [ Glycine max (L.) Merr.] causes poor stands consequently reduces yields. Resistance to seedling diseases caused by spp. was reported in the cultivar Archer described be associated with Rps1k gene for resistance Phytophthora sojae . To characterize inheritance determine if this is linked , cross × ‘Hutcheson’ (susceptible parent) made F 2:4 lines generated. Parents were screened aphanidermatum using a hypocotyl inoculation technique. Five days...
Cercospora sojina causes frogeye leaf spot of soybean, which can cause serious economic losses in the United States. In this study, 132 C. isolates were collected from six fields (from two counties, Cross and Crawford) Arkansas. To determine mating type, a multiplex polymerase chain reaction assay was developed with primers specific for sojina. Of isolates, 68 had MAT1-1-1 idiomorph 64 MAT1-2 idiomorph; no possessed both idiomorphs. Both types present variety spatial scales, including...
Charcoal rot of soybean [ Glycine max (L.) Merr.], caused by the soilborne fungus Macrophomina phaseolina (Tassi) Goid., has ranked among most important diseases in United States. Disease management is typically done a multifaceted approach through crop rotation, tillage, irrigation, and seed treatments aimed at minimizing damage pathogen. Development genetic resistance to charcoal appears be efficient strategy control disease; however, there are no reports regions associated with disease....
Isolates of Phytophthora sojae were collected during 1995 to 1998 from soil samples in 23 Arkansas soybean fields 14 counties, and characterized by race. A total seven races (races 2, 10, 14, 15, 24, 26, 38) found. Races 15 the most common comprised 47, 22, 9% 32 isolates, respectively. single isolate each 38 also was Three isolates could not be race due inconsistent results. In 1997 1998, a portion field at University Southeast Research Experiment Center near Rohwer, AR surveyed intensively...