A5026781544- Insect-Plant Interactions and Control
- Plant Pathogens and Fungal Diseases
- Plant Disease Resistance and Genetics
- Plant Virus Research Studies
- Plant Pathogens and Resistance
- Plant Pathogenic Bacteria Studies
- Insect Pest Control Strategies
- Plant and fungal interactions
- Entomopathogenic Microorganisms in Pest Control
- Insect Resistance and Genetics
- Plant and Fungal Interactions Research
- Phytoplasmas and Hemiptera pathogens
- Plant Disease Management Techniques
- Agricultural Practices and Plant Genetics
- Plant-Microbe Interactions and Immunity
- Turfgrass Adaptation and Management
- Nematode management and characterization studies
- Mycorrhizal Fungi and Plant Interactions
- Plant and animal studies
- Cocoa and Sweet Potato Agronomy
- Plant tissue culture and regeneration
- Insect and Pesticide Research
- Plant Gene Expression Analysis
- Potato Plant Research
- Lignin and Wood Chemistry
Oregon State University
2016-2025
United States Department of Agriculture
2016-2018
Agricultural Research Service
2008-2018
North Dakota State University
2018
University of Florida
2018
University of Georgia
2018
North Carolina Department of Agriculture and Consumer Services
2018
Clemson University
2018
University of Idaho
2016
Washington State University
2016
Long-term data sets are rare in agriculture, and the impact of plant diseases on food production is challenging to measure, which makes it difficult assess policy changes or research-based disease control efforts. Despite this challenge, clear that one largest impacts biological research security over past century has been vegetatively propagated fruit vegetable crops such as potato. The yield quality these higher countries have effective propagation certification systems. Of systems, seed...
Potato virus Y (PVY) is a serious threat to potato production due effects on tuber yield and quality, in particular, induction of necrotic ringspot disease (PTNRD), typically associated with recombinant strains PVY. These have been spreading the United States for past several years, although reasons this continuing spread remained unclear. To document assess between 2011 2015, strain composition PVY isolates circulating Columbia Basin area was determined from hundreds seed lots various...
Grasses, such as Zea mays L. (maize), contain relatively high levels of p-coumarates (pCA) within their cell walls. Incorporation pCA into walls is believed to be due a hydroxycinnamyl transferase that couples monolignols. To understand the role in maize development, p-coumaroyl CoA:hydroxycinnamyl alcohol (pCAT) was isolated and purified from stems. Purified pCAT subjected partial trypsin digestion, peptides were sequenced by tandem mass spectrometry. TBLASTN analysis acquired peptide...
Plant health is regulated by complex consortia of soil microbes with growth-promoting and pathogenic functions. In potato production, various management practices are undertaken to boost yields suppress diseases, but connections between these practices, microbiomes, tuber have not been characterized across diverse growing regions. To identify associated increased yields, we established four-year field trials eight US sites from Oregon Maine that consisted controls, fumigations, organic...
Abstract Potato production typically entails both greater soil disturbance and higher profits than alternative crops in the regions which they are grown. This article provides an analysis of economically relevant outcomes from health practice trials conducted potato systems four locations across continental United States 2019 to 2022. We compare revenue profit estimates over several health-related practices: rotation duration, chemical fumigation, mustard biofumigation, application organic...
In May 2023, one potato seed lot (variety ‘Russet Norkotah’) submitted to Oregon State University’s Hermiston Agricultural Research and Extension Center trials (Umatilla County, OR) had stunted plants expressing wilt stem rot at the base of stem. Disease incidence was 24% (43/182 plants). Four symptomatic were sampled shipped overnight on ice USDA Emerging Pests Pathogens Unit in Ithaca, NY. To isolate pathogens associated with disease, we incubated minced tissue from diseased double...
Wheat stem sawfly (WSS), Cephus cinctus (Hymenoptera: Cephidae), is a native grass-feeding insect and one of the most important pests wheat in North America. Yield losses from WSS can be due to boring and/or cutting which causes plants lodge. Current methods, such as solid varieties insecticides, do not effectively control WSS. A better understanding emergence, population size, related environmental factors critical building efficient effective integrated pest management (IPM) strategies for...
Many pollinator populations are experiencing declines, emphasizing the need for a better understanding of complex relationship between bees and flowering plants. Using DNA metabarcoding to describe plant-pollinator interactions eliminates many challenges associated with traditional methods has potential reveal more comprehensive foraging behaviour life history. Here we use ITS2 rbcL gene regions identify plant species present in pollen loads 404 from three habitats eastern Oregon. Our...
In Wisconsin, vegetable crops are threatened annually by the aster yellows phytoplasma (AYp), which is obligately transmitted leafhopper. Using a multiyear, multilocation data set, seasonal patterns of leafhopper abundance and infectivity were modeled. A index (AYI) was deduced from model predictions to represent expected risk pathogen transmission infectious leafhoppers. The primary goal this study identify periods time during growing season when crop protection practices could be targeted...
Accelerating the pace of microbiome science to enhance crop productivity and agroecosystem health will require transdisciplinary studies, comparisons among datasets, synthetic analyses research from diverse management contexts. However, despite widespread availability crop-associated data, variation in field sampling laboratory processing methodologies, as well metadata collection reporting, significantly constrains potential for integrative comparative analyses. Here we discuss need...
Abstract BACKGROUND: Developmental changes occur in corn ( Zea mays L.) stems from cell initiation to fully mature types. During wall maturation the lignin is acylated with p ‐coumarates CA). This work describes characterization studies of ‐coumaroylation process relation stem development. RESULTS: Corn plants three locations were harvested and tissues analyzed all nodes even‐numbered internodes above soil line. Changes carbohydrates reflect a shift lignification at expense structural...
Journal Article Detection and Variability of Aster Yellows Phytoplasma Titer in Its Insect Vector, Macrosteles quadrilineatus (Hemiptera: Cicadellidae) Get access K. E. Frost, Frost Search for other works by this author on: Oxford Academic PubMed Google Scholar D. Willis, Willis R. L. Groves 3 3Corresponding author: Department Entomology, University Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706 (e-mail: groves@entomology.wisc.edu). Economic Volume 104, Issue 6, 1 December 2011,...
Soil microorganisms are integral to maintaining soil health and crop productivity, but fumigation used suppress soilborne diseases may affect microbiota. Currently, little is known about the legacy effects of on microbial communities their response at production scale. Here, 16S rRNA gene internal transcribed spacer amplicon sequencing was characterize bacterial fungal in soils from intensively managed fields with without previous exposure metam sodium (MS) fumigation. The effect history,...
In Wisconsin, vegetable crops are threatened annually by infection of the aster yellows phytoplasma (AYp), causal agent (AY) disease, vectored leafhopper, Macrosteles quadrilineatus Forbes. Aster leafhopper abundance and infectivity influenced processes operating across different temporal spatial scales. We applied a multilevel modeling approach to partition variance in multifield, multiyear, pest scouting data sets containing covariates associated with infectivity. Our intent was evaluate...
Two fields of coriander (
Hemp (Cannabis sativa) acreage in Oregon has increased by approximately 240 times the last 5 years, and a greater number of hemp diseases have been observed. This special report documents pathogens, particularly those causing virus virus-like diseases, that detected from field greenhouse-grown crops Oregon, based on plant samples submitted to Hermiston Agricultural Research Extension Center Plant Clinic State University 2019 2020. Symptoms signs were used evaluate disease types determine...
DNA metabarcoding of pollen is a useful tool for studying bee foraging ecology. However, several questions about this method remain unresolved, including the extent to which sequence read data quantitative, type count removal threshold use and how that choice affects our ability detect rare flower visits, artefacts may confound conclusions behavior. To address these questions, we isolated from five plant species created treatments comprised each alone combinations multiple varied in richness...
Knowledge of the Colorado potato beetle's, Leptinotarsa decemlineata (Say), relationship to previous crops has contributed development a pest management strategy focused upon crop rotation. Previous investigations revealed that rotations exceeding 0.4 km were effective in reducing colonization current season potato. The study examines between beetle abundance (Solanum tuberosum L.) and distance from multiple, year fields Wisconsin, integrates information about influence natural habitats...
Epidemics of late blight, caused by Phytophthora infestans (Mont.) de Bary, have been studied plant pathologists and regarded with great concern potato tomato growers since the Irish famine in 1840s. P. populations continued to evolve, unique clonal lineages arising which differ pathogen fitness pathogenicity, potentially impacting epidemiology. In 2012 2013, US-23 lineage predominated blight epidemics most U.S. production regions, including Wisconsin. This was unknown prior 2009. For...
1,3-Dichloropropene (1,3-D) is a well-known nematicidal soil fumigant on many crop species. Currently, little known about its impact microbial communities using culture-free methods. In this study, we investigated changes in bacterial and fungal diversity composition at two depths (30.5 61 cm) response to management practices of applying 1,3-D four different rates (103, 122, 140, 187 liters/ha) relative an untreated control potato production fields 16S rRNA internal transcribed spacer (ITS)...
Verticillium wilt (Vw), caused by the soilborne fungi dahliae and V. albo-atrum, is an important disease of potato (Solanum tuberosum). Host plant resistance a promising method Vw control. Culture-based methods that quantify pathogen in host tissue often are used for screening. To evaluate processing time, accuracy, precision these methods, 46 clones were planted field naturally infested with to collect data on visual symptoms, colonization, yield. In 2002, severity explained 4.34%...