A5067640680- Plant Virus Research Studies
- Plant Pathogens and Fungal Diseases
- Plant Disease Resistance and Genetics
- Plant Pathogens and Resistance
- Wheat and Barley Genetics and Pathology
- Genetic and Environmental Crop Studies
- Legume Nitrogen Fixing Symbiosis
- Plant and Fungal Interactions Research
- Insect-Plant Interactions and Control
- Plant Disease Management Techniques
- Fungal Plant Pathogen Control
- Agricultural pest management studies
- Agronomic Practices and Intercropping Systems
- Plant-Microbe Interactions and Immunity
- Mycotoxins in Agriculture and Food
- Insect symbiosis and bacterial influences
- Agricultural Innovations and Practices
- Organic Food and Agriculture
- Weed Control and Herbicide Applications
- Diverse Educational Innovations Studies
- Essential Oils and Antimicrobial Activity
- Yeasts and Rust Fungi Studies
- Bacterial Identification and Susceptibility Testing
- Amyotrophic Lateral Sclerosis Research
- Berry genetics and cultivation research
Montana State University
2015-2025
Virginia Tech
2023-2025
New Mexico State University
2017
Planta
2017
Plant (United States)
2011-2015
Agricultural Research Service
2005-2007
Cornell University
2006-2007
Field surveys in 2008 determined the prevalence and diversity of viruses present Great Plains wheat crops. Symptomatic plants (n = 754) nine states were tested for Wheat streak mosaic virus (WSMV), (WMoV, formerly known as High virus), Triticum (TriMV), Barley yellow dwarf virus-PAV (BYDV-PAV), Cereal virus-RPV (CYDV-RPV), using indirect ELISA. Virus varied greatly, with average frequency detection highest WSMV (47%), followed by WMoV (19%), TriMV (17%), BYDV-PAV (7%), lowest CYDV-RPV (2%)....
Cereal yellow dwarf virus-RPV (CYDV-RPV) is transmitted specifically by the aphids Rhopalosiphum padi and Schizaphis graminum in a circulative nonpropagative manner. The high level of vector specificity results from having functional components receptor-mediated endocytotic pathways to allow virus transverse gut salivary tissues. Studies F(2) progeny crosses nonvector genotypes S. showed that transmission efficiency heritable trait regulated multiple genes acting an additive fashion gut-...
Investigations of antimicrobial use in companion animals are limited. With the growing recognition need for improved stewardship, there is urgent more detailed understanding patterns this sector.To investigate medical and surgical conditions dogs cats by Australian veterinarians.A cross-sectional study was performed over 4 months 2011. Respondents were asked about their choices antimicrobials empirical therapy diseases cats, duration therapy, selection based on culture susceptibility...
Pulse crops such as chickpeas, lentils, and dry peas are grown widely for human animal consumption. Major yield- quality-limiting constraints include diseases caused by fungi oomycetes. The environmental health concerns of synthetic fungicides used disease management, emergence fungicide-resistant pathogens, demand organic pulse crop products necessitate the search effective alternatives. Safe environmentally friendly plant-derived essential oils (EOs) have been reported against some...
Root rot caused by Fusarium spp. is a significant issue in the chickpea-growing regions of Montana. The specific species responsible for disease and their prevalence remain uncertain. A survey was conducted 2020 2021 to identify Montana’s associated with chickpea. Four hundred twenty-six isolates were recovered from symptomatic chickpea roots across ten counties state. Isolates identified comparing translation elongation factor 1-α (TEF1-α) sequences FUSARIUM-ID database. Among isolates,...
Root rot caused by Fusarium species is a major problem in the pulse growing regions of Montana. isolates (n = 112) were obtained from seeds and roots chickpea, dry pea, lentil. Isolates identified comparing sequences internal transcribed spacer region translation elongation factor 1-α Fusarium-ID database. avenaceum was most abundant (28%), followed F. acuminatum (21%), poae (13%), oxysporum (8%), culmorum (6%), redolens sporotrichioides solani (4%), graminearum (2%), torulosum tricinctum...
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...
Wild grasses, crops, and grassy weeds are known to host Wheat streak mosaic virus (WSMV) its vector, the wheat curl mite (WCM). Their relative importance as a source of WSMV was evaluated. A survey small-grain fields throughout Montana conducted between 2008 2009. Cheatgrass most prevalent weed frequent viral host, with 6% infection by in (n = 125) 15% 2009 358). By mechanically inoculating plants greenhouse, highest susceptibility found rye brome (52.1%), jointed goatgrass (80.9%), wild oat...
Ascochyta blight (AB) of pulse crops (chickpea, field pea, and lentils) causes yield loss in Montana, where 1.2 million acres was planted to pulses 2016. Pyraclostrobin azoxystrobin, quinone outside inhibitor (QoI) fungicides, have been the choice farmers for management ascochyta pulses. However, a G143A mutation cytochrome b gene has reported confer resistance QoI fungicides. A total 990 isolates blight-causing fungi were isolated screened resistance. Out these, 10% from chickpea, 81% dry...
ABSTRACT Sexual forms of two genotypes the aphid Schizaphis graminum, one a vector, other nonvector viruses that cause barley yellow dwarf disease (Barley virus [BYDV]-SGV, luteovirus and Cereal virus-RPV, polerovirus), were mated to generate F1 F2 populations. Segregation transmission phenotype for both in populations indicated is under genetic control parents are heterozygous genes involved transmission. The ability transmit was correlated within populations, suggesting major gene or...
The soybean aphid, Aphis glycines, causes yield loss and transmits viruses such as Soybean mosaic virus (SMV) in (Glycine max). Field experiments were designed to monitor the landing rate of A. glycines transmission SMV grown six crop management environments. Management systems evaluated application postemergence insecticide or no insecticide, within each treatment herbicide, glyphosate, imazamox application. In 2001, early-season incidence was 2%, which increased 80% 18 days after beginning...
Clonal populations of the aphid, Schizaphis graminum, have been separated into biotypes based on host preference and their ability to overcome resistance genes in wheat. Recently, several were found differ transmit one or more viruses that cause barley yellow dwarf disease grain crops, vector competence was linked preference. The genetics has studied S. but how this may relate transmission plant is unknown. Sexual morphs a nonvector graminum genotype induced from parthenogenetic females...
Field pea is an annual, cool-season legume native to northwest southwest Asia. It was among the first crops cultivated by man. The crop grown primarily in North Dakota, Washington, Montana, Idaho, Oregon, and southern Canada. Ascochyta blight a serious disease affecting above ground portions at all growth stages. Stem, crown, pod, foliar diseases of are caused complex pisi, Mycosphaerella pinodes, Phoma pinodella. This paper reviews pathogens involved. Accepted for publication 28 January...
Management of Ascochyta blight in pea, lentil, and chickpea relies on repeated fungicide applications, which has led to development resistance disease control failures some systems. In vitro assays were conducted determine baseline sensitivity Mycosphaerella pinodes (Ascochyta pinodes), A. lentis, rabiei populations the demethylation-inhibiting prothioconazole succinate dehydrogenase-inhibiting fungicides boscalid fluxapyroxad by determining effective concentration at 50% germination or...
Damping off of chickpea (Cicer arietinum) can lead to stand loss and yield reduction. Fungicide seed treatments are able successfully control damping off, but the effectiveness many commercially available biological has not been well tested. The objective this study was test effect fungicide on cultivars kabuli desi types. Bacillus pumilus GB34 (Yield Shield), subtilis GB03 (Kodiak), B. MBI 600 (Subtilex), Streptomyces lydicus WYEC 108 (Actinovate), griseoviridis K61 (Mycostop), Trichoderma...
Although chickpeas are reported to be susceptible more than 50 pathogens, few diseases currently recognized as significant economic constraints production. Ascochyta blight, caused by the fungal pathogen rabiei, is most serious chickpea disease worldwide. This paper describes pathogen, symptoms of infection, biological and morphological characteristics, methods study fungus. Accepted for publication 17 November 2010. Published 3 January 2011.
Plant genotype, age, size, and environmental factors can modify susceptibility tolerance to disease. Understanding the individual combined impacts of these is needed define improved disease management strategies. In case Wheat streak mosaic virus (WSMV) in winter wheat, yield losses plant have been found be greatest when crop exposed fall central southern Great Plains. However, seasonal dynamics risk may different northern Plains, a region characterized by relatively cooler conditions,...
Wheat streak mosaic, caused by mosaic virus (WSMV; family Potyviridae), is the most important and common viral disease of wheat (Triticum aestivum L.) in Great Plains North America. WSMV transmitted curl mite (WCM; Aceria tosichella). We evaluated how mean daily temperatures, cumulative growing degree-days, day year, surrounding alternative host identity affected WCM infestation infection from late summer through early autumn Montana, United States. Cumulative warm temperatures (i.e.,...
Following the discovery of two new wheat virus diseases in United States, Great Plains region (Colorado, Kansas, Montana, Nebraska, North Dakota, Oklahoma, South Texas, and Wyoming) National Plant Diagnostic Network (NPDN) initiated a project to measure prevalence five using indirect ELISA. Wheat streak mosaic (WSMV), (WMoV), Triticum (TriMV) were found all nine states. WSMV was most prevalent, averaging 23 47% samples each year. TriMV WMoV detected with (in up 76% samples). All three...
Management of vector-borne plant viruses requires understanding how abiotic (e.g., resource availability) and biotic virus-vector interactions) factors affect disease via effects on epidemiological parameters that drive spread. We conducted two complementary experiments using Wheat streak mosaic virus (WSMV): (i) a field study to determine the nitrogen (N) fertilization winter wheat (Triticum aestivum L.) susceptibility WSMV infection (ii) growth chamber evaluate N carbon dioxide (CO2)...
Didymella pisi is the predominant causal pathogen of ascochyta blight dry pea causing yield losses in Montana, where 415 000 acres were planted to 2018. Thirty-three microsatellite markers developed for pathogenic fungus, pisi, these used analyze genetic diversity and population structure 205 isolates from four different geographical regions Montana. These loci produced a total 216 alleles with an average 1.63 per marker. The polymorphic information content values ranged 0.020 0.990 0.323....
spp. cause gray mold and are significant pathogens of pulse crops (dry pea, lentil, chickpea). Seedling infection can result in plant stunting death. In this study, 100
Fusarium root rot/wilt caused by various spp. significantly threatens lentil (Lens culinaris Medikus) production in the Northern Great Plains (NGP) region. However, specific composition of seedborne causing this disease is not well understood. To address gap, we conducted a comprehensive study spanning 2019 and 2020, collecting seeds from 75 commercial fields across Montana, North Dakota, Washington, Idaho, Ontario. Our analysis focused on both externalized internalized pathogens, with...
Summary Over‐winter mortality, that is, winterkill, reduces cereal crop competitive ability and yield. While management environmental variables are known to affect the extent which weeds contribute increased winterkill is largely unknown. Winter annual may increase through resource competition by increasing incidence of damage from plant pathogens cause winterkill. We evaluated impact summer ( A vena fatua ) winter B romus tectorum on over‐winter survival rate wheat over three winters,...