A5101468108- Plant Pathogens and Fungal Diseases
- Plant Pathogenic Bacteria Studies
- Yeasts and Rust Fungi Studies
- Plant Pathogens and Resistance
- Food Industry and Aquatic Biology
- Plant-Microbe Interactions and Immunity
- Phytoplasmas and Hemiptera pathogens
- Potato Plant Research
- Plant Disease Resistance and Genetics
- Plant pathogens and resistance mechanisms
- Cocoa and Sweet Potato Agronomy
- Agricultural Productivity and Crop Improvement
- Soil and Environmental Studies
- Seaweed-derived Bioactive Compounds
- Allelopathy and phytotoxic interactions
- Mycorrhizal Fungi and Plant Interactions
- Powdery Mildew Fungal Diseases
- Geological Studies and Exploration
- Plant nutrient uptake and metabolism
- Marine and environmental studies
- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Agriculture and Biological Studies
- Marine and coastal plant biology
- Ecology and biodiversity studies
Pennsylvania Department of Agriculture
2010-2025
Nizhny Novgorod State Pedagogical University
2023
Karelian Research Centre
2023
Russian Academy of Sciences
2023
Institute of Geology of the Karelian Research Center
2023
All-Russian Institute of Plant Protection
2014
Pennsylvania State University
2008-2013
Russian Research Institute for Phytopathology
2003
N.D. Zelinsky Institute of Organic Chemistry
1999
Lomonosov Moscow State University
1999
An ongoing outbreak of X-Disease, associated with ‘Candidatus Phytoplasma pruni’ has resulted in severe economic losses for cherry and stone fruit growers the U.S. Pacific Northwest last decade. Given that this pathogen is transmitted by polyphagous leafhopper species, primarily Colladonus montanus ssp. reductus C. geminatus PNW, alternative plant hosts present a significant management concern. Here we surveyed phytoplasma incidence non-Prunus plants found around orchard borders compared...
Phytophthora is a long-established, well known and globally important genus of plant pathogens. Phylogenetic evidence has shown that the biologically distinct, obligate biotrophic downy mildews evolved from at least twice. Since, cladistically, this renders ‘paraphyletic’, it been proposed evolutionary clades be split into multiple genera (Runge et al. 2011; Crous 2021; Thines 2023; 2024). In letter, we review arguments for retention generic name with broad circumscription made by Brasier...
Phytophthora spp. represent a serious threat to agricultural and ecological systems. Many novel have been reported in recent years, which is indicative of our limited understanding the ecology diversity nature. Systematic cataloging genotypic phenotypic information on isolates previously described species serves as baseline for identification, classification, risk assessment new isolates. The Database (PD) was established catalog such data web-accessible searchable format. To support...
The emergence of plant pathogens is often associated with waves unique evolutionary and epidemiological events.
The increasing movement of exotic pathogens calls for systematic surveillance so that newly introduced can be recognized and dealt with early. A resource crucial recognizing such is knowledge about the spatial temporal diversity endemic pathogens. Here, we report an effort to build this Pennsylvania (PA) by characterizing identity distribution Phytophthora species isolated from diverse plant in PA nurseries greenhouses. We identified 1137 isolates cultured clinical samples >150 submitted...
Rhodococcus fascians, a gram-positive phytopathogenic bacterium, causes fasciation and leafy galls on wide range of monocotyledonous dicotyledonous plants for which it requires the plasmid-borne fas operon. Strains isolated from symptomatic over 20-year-period exhibited high degree variability when their virulence was assessed garden pea seedlings. Polymerase chain reaction amplification fas-1 fasR genes randomly chosen single colonies showed that many strains consisted two subpopulations,...
Recent investigation of bacteria isolated from samples submitted to the Plant Disease Diagnostic Laboratory, Pennsylvania Department Agriculture indicated that in 1995, Xanthomonas gardneri (ex Sutic 1957) (2) caused a leaf spot on tomato plants (Lycopersicon esculentum Mill.). In we examined 185 and 36 pepper (13 field, 2 garden center, 38 greenhouse, 4 residence, 16 field-grown transplant, 148 greenhouse-grown transplant samples). A processing company representative collected showing...
To document the distribution of potentially harmful Phytophthora spp. within Pennsylvania, Pennsylvania Department Agriculture collected 89 plant, 137 soil, and 48 water samples from 64 forested sites during 2018 to 2020. In total, 231 strains were isolated using baiting assays identified based on morphological characteristics sequences nuclear mitochondrial loci. Twenty-one in nine clades one unidentified species present. Phytophthoraabietivora, a recently described clade 7a species, was...
Rhodococcus fascians is a gram-positive bacterium that causes bacterial fasciation on wide range of ornamental plants. To address the need for reliable, sensitive, and specific method detecting R. in infected plant materials, real-time (RT) PCR assay was developed. The target detection fas-1, plasmid-borne gene essential virulence. DNAs from all confirmed pathogenic strains consistently tested positive, with limit 30 fg DNA. In repeated experiments pure culture, as few 2.5 CFU were positive....
Recurrent epiphytotics of X-disease, caused by ‘Candidatus Phytoplasma pruni,’ have inflicted significant losses on commercial cherry and peach production across North America in the last century. During this period, there been multiple studies reporting different disease phenotypes and, more recently, identifying strains through sequencing core genes, but symptoms not, to date, linked with genotype. Therefore, study we collected assessed differing from U.S. states conducted multilocus...
The article presents the results of researching morphometric and hydrological characteristics Lakes CHarskoe Nuksenskoe suggests their genesis. have scientific (zoological, botanical, geological, geomorphological), water conservation significance, perform environmental function typical biocenoses karst lakes. During research, a bathymetric survey was carried out from board boat, using an echo sounder, combined with navigator. field research were processed geoinformation program QGIS, digital...
The results of improving selection the early ripeness potato plants varieties - Red Scarlett, Latona, Impala in original seed production culture are presented. During two years research, visual evaluation best progenies by number and weight tubers correspondes to their using cluster step-by-step discriminant analyses 35.3%. 50.0. 62.5%. In studied varieties, based on diagnostics contributes obtaining more fruitful with average 73.5-147.1 g a large fraction 67.7-103.7 per plant. Additionally,...
Aloe vera (L.) Burm. f. is a tropical evergreen perennial in the family Liliaceae. Native to Arabian Peninsula, it sold Pennsylvania as an ornamental and for its medical topical purposes due high levels of amino acids, anthraquinones, saponins, vitamins A, B, C, E (Sahu et al. 2013). In February 2020, at plant nursery Lancaster County, Pennsylvania, 5 out 15 mature A. plants cm pots showed symptoms signs rust on leaves, exhibiting dark-brown erumpent pycnial spots with chlorotic band...
The article presents the results of studying peculiarities formation aboveground mass and biological adaptability three-component legume-cereal grass mixtures with participation varieties timothy (VIK 9), awnless brome (Fakelny) changeable alfalfa (Selena, Pastbishchnaya 88, Agnia). Using method main components for a comprehensive analysis length, number shoots studied species, as well yield dry matter stands, two were identified, which explain variability characteristics each mowing by...
The aim of the research was to study yield indicators 36 early maturing potato varieties in northern region (Arkhangelsk region) and highlands North Caucasus (an altitude 2500 m above sea level). experimental work carried out 2015–2020. characteristic features are light period (up 21 hours June – July), 
 which contributes an increase duration interphase periods plant development, a short (14 hours), sharp temperature drop daytime (15.1 25.8 °С) night (7.8 15.2 ° C) hours, intense solar...
The article presents the results of a three-year field experiment to study potato yields, as well incidence Kholmogorsky (early ripening) and Nevsky (middle early) varieties with black scurf silver when planting visually infection-free seed tubers varying degrees growth cracks. Tuber cracking can be caused by abiotic, biological anthropogenic factors. leads decrease in marketability, an increase waste during mechanical peeling potatoes, likelihood its infection pathogens. It was found that...
The article presents the results of a 4-year study three potato varieties different maturity groups on 70th, 80th and 90th days harvesting in Karelia. At same time, highest yield indicators were found early-maturing variety Pushkinets first date harvesting, middle-early Nevsky — second third dates. maximum medium-ripened Peterburgsky was at later date. reliable influence growing conditions number, mass tubers per plant, yield, marketability starch content determined. In contrast to "variety"...