A5032086850- Wheat and Barley Genetics and Pathology
- Mycotoxins in Agriculture and Food
- Plant Pathogens and Fungal Diseases
- Plant Pathogens and Resistance
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Plant Disease Resistance and Genetics
- Plant Virus Research Studies
- Plant and Fungal Interactions Research
- Genetics and Plant Breeding
- Berry genetics and cultivation research
- Plant and animal studies
- Turfgrass Adaptation and Management
- Genetic Mapping and Diversity in Plants and Animals
- Plant Pathogenic Bacteria Studies
- Plant responses to elevated CO2
- Plant Disease Management Techniques
- Insect and Pesticide Research
- Crop Yield and Soil Fertility
- Intraocular Surgery and Lenses
- Machine Learning in Materials Science
- Connexins and lens biology
- Healthcare and Venom Research
- Sugarcane Cultivation and Processing
- Forest Insect Ecology and Management
Kansas State University
2014-2025
The Ohio State University
1989-2018
College of Wooster
2013-2014
Oklahoma State University
2013
Innolytics (United States)
2013
Center for Grain and Animal Health Research
2010-2011
Fort Hays State University
2011
University of Nebraska–Lincoln
2010
Oregon State University
2010
Agricultural Research Service
2010
Wheat and barley are critical food feed crops around the world. is grown on more land area worldwide than any other crop. In United States, production of wheat contributes to domestic use, export market balance trade. Fifteen years ago, Plant Disease published a feature article titled “Scab barley: A re-emerging disease devastating impact”. That described series severe Fusarium head blight (FHB) epidemics that occurred in States Canada, primarily from 1991 through 1996, with emphasis...
ABSTRACT Logistic regression models for wheat Fusarium head blight were developed using information collected at 50 location-years, including four states, representing three different U.S. wheat-production regions. Non-parametric correlation analysis and stepwise logistic identified combinations of temperature, relative humidity, rainfall or durations specified weather conditions, 7 days prior to anthesis, 10 beginning crop as potential predictor variables. Prediction accuracy ranged from 62...
Fusarium head blight (FHB) or scab, incited by graminearum, can cause significant economic losses in small grain production. Five field experiments were conducted from 2007 to 2009 determine the effects on FHB and associated mycotoxin deoxynivalenol (DON) of integrating winter wheat cultivar resistance fungicide application. Other variables measured yield percentage Fusarium-damaged kernels (FDK). The fungicides prothioconazole + tebuconazole (formulated as Prosaro 421 SC) applied at rate...
(1998). Vistas of tan spot research. Canadian Journal Plant Pathology: Vol. 20, No. 4, pp. 349-370.
Rational management of plant diseases, both economically and environmentally, involves assessing risks the costs associated with correct incorrect tactical decisions to determine when control measures are warranted. Decision support systems can help inform users disease risk thus assist in accurately targeting events critical for management. However, many instances adoption these use routine has been perceived as slow. The under-utilization some decision is likely due technical perception...
Our objective was to identify weather-based variables in pre- and post-anthesis time windows for predicting major Fusarium head blight (FHB) epidemics (defined as FHB severity ≥ 10%) the United States. A binary indicator of 527 unique observations (31% which were epidemics) linked 380 predictor summarizing temperature, relative humidity, rainfall 5-, 7-, 10-, 14-, or 15-day-long either post-anthesis. Logistic regression models built with a training data set (70% observations) using...
Wheat curl mite (WCM)-transmitted viruses—namely, streak mosaic virus (WSMV), Triticum (TriMV), and the High Plains (HPV)—are three of wheat-infecting viruses in central Great United States. TriMV is newly discovered its prevalence incidence are largely unknown. Field surveys were carried out Colorado, Kansas, Nebraska, South Dakota spring fall 2010 2011 to determine frequency co-infection with WSMV or HPV winter wheat. was most prevalent detected 83% 185 season–counties (= s-counties), 73%...
Predicting major Fusarium head blight (FHB) epidemics allows for the judicious use of fungicides in suppressing disease development. Our objectives were to investigate utility boosted regression trees (BRTs) predictive modeling FHB United States, and compare performances BRT models with those logistic we had developed previously. The data included 527 observations from 15 states over 26 years. BRTs fit a training set 369 observations, which classified as either (severity ≥ 10%) or non-major...
Viral diseases are a limiting factor to wheat production. Viruses difficult diagnose in the early stages of disease development and often confused with nutrient deficiencies or other abiotic problems. Immunological methods useful identify viruses, but specific antibodies may not be available require high virus titer for detection. In 2015 2017, plants containing Wheat streak mosaic (WSMV) resistance gene, Wsm2, were found have symptoms characteristic WSMV. Serologically, WSMV was detected...
Wheat (Triticum aestivum L.) yield and economic losses caused by pathogens were estimated annually plant pathologists from 29 U.S. states Ontario, Canada 2018 through 2021. During this four-year period, an reduction of 560 million bushels with loss value $2.9 billion USD. Annual ranged 111 in to 188 2019. Based on the number acres planted, average per acre was $18.10 USD across all years states/province recording estimates. Fusarium head blight (caused multiple species Fusarium) responsible...
Soybean rust, caused by Phakopsora pachyrhizi, may be the most important foliar disease of soybean. Within last 10 years, fungus has moved to many new geographical locations via spread airborne urediniospores. The objective this study was determine relationship between urediniospore viability and exposure solar radiation. Urediniospores P. pachyrhizi were exposed in Capitán Miranda, Paraguay, deleterious effects sunlight. Concomitant total (0.285 2.8 μm) ultraviolet (0.295 0.385 irradiance...
In past efforts, input weather variables for Fusarium head blight (FHB) prediction models in the United States were identified after following some version of window-pane algorithm, which discretizes a continuous time series into fixed-length windows before searching summary associated with FHB risk. Functional data analysis, on other hand, reconstructs assumed process (represented by recorded data) using smoothing functions, and is an alternative way working respect to Our objective was...
Vector-borne virus diseases of wheat are recurrent in nature and pose significant threats to crop production worldwide. In the spring 2011 2012, a state-wide sampling survey multiple commercial field sites university-managed Kansas Agricultural Experiment Station variety performance trial locations spanning all nine crop-reporting regions state was conducted determine occurrence Barley yellow dwarf virus-PAV (BYDV-PAV), Cereal virus-RPV, Wheat streak mosaic (WSMV), High plains virus,...
Epidemics are often triggered by specific weather patterns favouring the pathogen on susceptible hosts. For plant diseases, models predicting epidemics have therefore emphasized identification of early season that correlated with a disease outcome at some later point. Toward end, window-pane analysis is an exhaustive search algorithm traditionally used in pathology for mining correlations series respect to endpoint. Here we show, reference Fusarium head blight (FHB) wheat, functional...
Fusarium graminearum (teleomorph Gibberella zeae) is the most common pathogen of head blight (FHB) in North America. Ascospores released from perithecia G. zeae are a major source inoculum for FHB. The influence temperature and moisture on perithecial production development was evaluated by monitoring autoclaved inoculated cornstalk sections controlled environments. Perithecial assessed at all combinations five temperatures (12, 16, 20, 24, 28°C) four levels with means (range) -0.45 (-0.18,...
The deoxynivalenol (DON) content of maize silage was determined in samples collected at harvest and after ensiling 2001 2002 from 30 to 40 Pennsylvania dairies. Information on cultural practices, hybrid maturity, planting, date each site. Site-specific weather data a corn development model were used estimate Correlation analysis assess the relationship between data, development, practices preharvest DON. Fermentation characteristics (moisture, pH, so on) ensiled measured study their...
ABSTRACT In an effort to characterize the association between weather variables and inoculum of Gibberella zeae in wheat canopies, spikes were sampled assayed for pathogen propagules from plots established Indiana, North Dakota, Ohio, Pennsylvania, South Manitoba 1999 2005. Inoculum abundance was quantified as daily number colony forming units per spike (CFU/spike). A total 49 individual 24-h periods generated measurements ambient data. Polynomial distributed lag regression analysis,...
ABSTRACT Tan spot and Stagonospora blotch of hard red spring wheat served as a model system for evaluating disease forecasts by artificial neural networks. Pathogen infection periods on susceptible plants were measured in the field from 1993 to 1998, incidence data merged with 24-h summaries accumulated growing degree days, temperature, relative humidity, precipitation, leaf wetness duration. The resulting set 202 discrete was randomly assigned 10 modeldevelopment or -validation (n = 50)...
Tan spot, caused by Pyrenophora tritici-repentis, is an important foliar disease of wheat worldwide. The fungus produces two distinct symptoms, necrosis (nec) and chlorosis (chl), on susceptible genotypes. Fungal isolates have been grouped into five races based their ability to induce and/or differentials Glenlea, Katepwa, 6B365, Salamouni (1). Moreover, the were designated as follows: nec+chl+ (necrosis chlorosis), nec+chl- only), nec-chl+ (chlorosis nec-chl- (neither symptom). Races 3 5...
ABSTRACT Tan spot of wheat, caused by Pyrenophora tritici-repentis, provided a model system for testing disease forecasts based on an artificial neural network. Infection periods P. tritici-repentis susceptible wheat cultivars were identified from bioassay that correlated tan incidence with crop growth stage and 24-h summaries environmental data, including temperature, relative humidity, wind speed, direction, solar radiation, precipitation, flat-plate resistance-type wetness sensors. The...
Tar spot caused by the fungus Phyllachora maydis Maubl. is a significant foliar disease of corn (Zea mays L.). Threatening production across Americas, this can reduce quality silage and grain yield (Rocco da Silva et al. 2021; Valle-Torres 2020). Lesions P. are usually black, glossy, raised stromata on leaf surface occasionally husk. (Liu 1973; Rocco 2021). Samples consistent with tar were collected between September October 2022 from 6 fields in Kansas, 23 Nebraska, South Dakota. One sample...