A5055725167- Plant Pathogens and Fungal Diseases
- Plant Disease Resistance and Genetics
- Yeasts and Rust Fungi Studies
- Plant Pathogens and Resistance
- Mycotoxins in Agriculture and Food
- Wheat and Barley Genetics and Pathology
- Plant Disease Management Techniques
- Fungal Plant Pathogen Control
- Crop Yield and Soil Fertility
- Nematode management and characterization studies
- Plant Surface Properties and Treatments
- Agronomic Practices and Intercropping Systems
- Plant-Microbe Interactions and Immunity
- Genetically Modified Organisms Research
- Berry genetics and cultivation research
- Bioenergy crop production and management
- Genetic Mapping and Diversity in Plants and Animals
- Fire effects on ecosystems
- Silicon Effects in Agriculture
- Plant responses to elevated CO2
- Plant Virus Research Studies
- Food Quality and Safety Studies
- Plant pathogens and resistance mechanisms
- Sugarcane Cultivation and Processing
- Seed and Plant Biochemistry
Louisiana State University Agricultural Center
2009-2025
Louisiana State University
1989-2021
Annual decreases in soybean (Glycine max L. Merrill) yield caused by diseases were estimated surveying university-affiliated plant pathologists 28 soybean-producing states the United States and Ontario, Canada, from 2010 through 2014. Estimated losses each disease varied greatly state or province year. Over duration of this survey, cyst nematode (SCN) (Heterodera glycines Ichinohe) was to have more than twice as much loss any other disease. Seedling (caused various pathogens), charcoal rot...
Annual decreases in corn yield caused by diseases were estimated surveying members of the Corn Disease Working Group 22 corn-producing states United States and Ontario, Canada, from 2012 through 2015. Estimated loss each disease varied greatly state year. In general, foliar such as northern leaf blight, gray spot, Goss's wilt commonly largest Ontario during non-drought years. Fusarium stalk rot plant-parasitic nematodes most southern-most States. The mean economic due to 2015 was $76.51 USD...
Soybean (Glycine max [L.] Merrill) yield losses as a result of plant diseases were estimated by university and government pathologists in 29 soybean producing states the United States Ontario, Canada, from 2015 through 2019. In general, that resulted each 28 or pathogens varied state province well year. cyst nematode (SCN) (Heterodera glycines Ichinohe) caused more than twice much loss any other disease during survey period. Seedling (caused various pathogens), Sclerotinia stem rot (white...
Asian soybean rust, caused by Phakopsora pachyrhizi Sydow, has been known to occur in the eastern hemisphere for nearly a century. More recently, it was reported from Hawaii 1994, and southern Africa 1996-1998, Nigeria 2001, Brazil Paraguay 2002. Aerobiological models suggested that urediniospores of pathogen would be disseminated on wind currents continental United States association with tropical storms if disease became established north equator during hurricane season (U.S. Soybean Rust...
Annual reductions in corn (Zea mays L.) yield caused by diseases were estimated university Extension-affiliated plant pathologists 26 corn-producing states the United States and Ontario, Canada, from 2016 through 2019. Estimated loss each disease varied greatly state or province year. Gray leaf spot (caused Cercospora zeae-maydis Tehon & E.Y. Daniels) greatest parts of northern Ontario all years except 2019, Fusarium stalk rot spp.) also reduced yield. Tar Phyllachora maydis Maubl.), a...
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,...
Brown rust, caused by Puccinia melanocephala, can cause severe epidemics in susceptible sugarcane cultivars during spring and early summer Louisiana. The effect of the disease on yield was evaluated field experiments conducted three growing seasons. A mixture fungicides-azoxystrobin, propiconazole, tebuconazole-applied biweekly epidemic period kept brown rust severity low (<5%), plants protected fungicide applications throughout provided an estimate attainable for comparison with naturally...
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...
Fungicide efficacy guides, updated annually through the Crop Protection Network, inform fungicide selection for foliar and seedling diseases of corn (Zea mays) soybean (Glycine max). These guides rank fungicides based on multi-state field trials across U.S. Ontario, Canada. Trials were analyzed to validate these rankings by assessing under varying disease severities. Under high severity (≥5%), with best ratings significantly reduced gray leaf spot (GLS; caused Cercospora zeae-maydis)...
Fusarium head blight (FHB) caused primarily by graminearum, is a major disease of wheat in the United States. FHB managed part applications demethylation inhibitor (DMI) triazole fungicides during anthesis. The objective this study was to examine sensitivity U.S. populations F. graminearum DMI metconazole and tebuconazole. Isolates collected from between 1981 2014 were tested for fungicide using mycelial growth assays determine effective concentration at which 50% fungal inhibited (EC 50 )....
Soybean rust, caused by Phakopsora pachyrhizi, originally occurred in Asia. It has now spread to South America and the continental United States. This disease potential cause severe economic losses U.S. soybean growers, especially south, where environmental conditions are more favorable P. pachyrhizi survival during winter. In present study, effect of simulated southern Louisiana winter temperature (12°C, 14-h days 1°C, 10-h nights with 75% relative humidity) on rust urediniospore viability...
Field research in 2007 evaluated tracer deposition using different combinations of spray rates, vehicle speeds, and boom pressure aerial ground application Louisiana. The objectives were to compare canopy penetration soybean (Glycine max (L.) Merr.). Artificial mylar cards a (tartrazine) used quantify distribution penetration. Results showed that total increases when rates are equal or higher than 93.4 lha-1coupled with slower tractor speeds for ground-based systems (P < 0.05) 65.4 lha-1...
Certified Crop Advisers (CCAs) in Illinois, Kentucky, Louisiana, Mississippi, Missouri, North Carolina, and Ohio were surveyed to determine the usefulness of Soybean Rust Pest Information Platform for Extension Education (PIPE) public website (sbr.ipmpipe.org). Their responses collected using a webbased survey instrument. A total 361 CCAs 3,051 contacted (12%) responded survey. In addition being asked evaluate PIPE website, about value sentinel plot network used monitor spread soybean rust...