Yury Noskov

Institute of Systematics and Ecology of Animals · Laboratory of Insect Pathology

Humic thermokarst lakes of permafrost peatlands in Western Siberia Lowland (WSL) are major environmental controllers of carbon and nutrient storage in inland waters and greenhouse gases emissions to the atmosphere in the subarctic. In contrast to sizable former research devoted to hydrochemical and hydrobiological (phytoplankton) composition, zoopl...

Here we present a method for studying Colorado potato beetle hibernation under the natural conditions of the temperate zone as well as a technique for collecting beetles in winter. This method allows to obtain a desired number of overwintering individuals for various analyses at any stage of hibernation. One of the major pests of potato Solanum tu...

Symbiotic bacteria have a significant impact on the formation of defensive mechanisms against fungal pathogens and insecticides. The microbiome of the mosquito Aedes aegypti has been well studied; however, there are no data on the influence of insecticides and pathogenic fungi on its structure. The fungus Metarhizium robertsii and a neurotoxic inse...

Combination of insect pathogenic fungi and microbial metabolites is a prospective method for mosquito control. The effect of the entomopathogenic fungus Metarhizium robertsii J.F. Bischoff, S.A. Rehner & Humber and avermectins on the survival and physiological parameters of Aedes aegypti (Linnaeus, 1762) larvae (dopamine concentration, glutathione...

Entomopathogenic fungi can be inhibited by different soil microorganisms, but the effect of a soil microbiota on fungal growth, survival, and infectivity toward insects is insufficiently understood. We investigated the level of fungistasis toward Metarhizium robertsii and Beauveria bassiana in soils of conventional potato fields and kitchen potato...

Different developmental stages of insects may be dissimilar in immunity functioning. Additionally, the stages often inhabit diverse environments with specific microbial communities. In the Colorado potato beetle, a strong increase in resistance to entomopathogenic fungi is observed during the intermolt period of last-instar larvae, but mechanisms o...

BACKGROUND We assume that certain representatives of gut microflora mediate immune changes during dysbiosis, accelerating septicemia caused by Bacillus thuringiensis. RESULTS Co‐introduction of Citrobacter freundii with Bacillus thuringiensis var. tenebrionis (morrisoni) (Bt) led to an increase in Colorado potato beetle (CPB) larval mortality to 6...

Gut physiology and the bacterial community play crucial roles in insect susceptibility to infections and insecticides. Interactions among Colorado potato beetle Leptinotarsa decemlineata (Say), its bacterial associates, pathogens and xenobiotics have been insufficiently studied. In this paper, we present our study of the survival, midgut histopatho...

Susceptibility to the fungus Metarhizium robertsii and changes in host defences were evaluated in different stages of the intermoult period (4–6h, 34–36h and 84–86h post moult in IV larval instars) of the Colorado potato beetle. A significant thickening of the cuticle during larval growth was accompanied by decreases in cuticle melanization, phenol...

p>The interaction between the entomopathogenic fungus Metarhizium robertsii and the pyrethroid insecticide esfenvalerate on Daphnia magna Straus was investigated. A synergy in the mortality of daphnids was detected after simultaneous treatment with sub-lethal doses of the fungus (1×10⁵ conidia/ml) and esfenvalerate (0.1 mkg/l). The defen...

The paper describes the results of the unique analysis of nucleotide sequences of two fragments of the mitochondrial DNA (mtDNA): cytochrome c- oxidase subunite 1 gene fragment (Co-1) and a control region fragment (D-loop) for Northern pike Esox lucius from Shchuchye (No. 1-3) and Bezymyannoye lakes (the Republic of Komi). Lake district Shchuch'ye...

The paper describes a complex novel airlift plant for the simultaneous cleaning of water reservoir bottom sediments and water. The plant’s design was tested in a model. Chemical analysis of the bottom sediments after experimental cleaning revealed a total oil content of 0.40–0.45 g kg-1, while the estimated initial oil content was around 16 g kg-1....

This study describes the benthic communities of different types of reservoirs in the Vasyugan River floodplain-river system. Twenty-one macroinvertebrate taxonomic groups of animals were found in the Vasyugan basin during the period of study (1992- 2002). The most frequently encountered groups were Chironomidae (90%), Oligochaeta (72%) and Mollusca...

Norm setting for oil and petroleum products concentration in bottom sediments of water bodies in the Russian Federation is very important for the protection of fishery water bodies. The lack of specified content standards for petroleum products in different types of bottom sediments in oil extraction regions impedes projects to rehabilitate water b...

Oil contamination of bodies of water in the Russian Federation is one of the most widespread impacts on ecosystems. The Khanty-Mansiysk autonomous district-Yugra, the main oil extraction area in Russia, is one of the most oil-contaminated regions. The article summarises data from hydrochemical research on the level of petroleum hydrocarbons in wate...

Experimental trial and manufacturing application of technologies and devices for purification of water bodies from oil and petroleum products are developed at the premises of Biological Institute of National Research Tomsk State University. More attention is paid to treatment of bottom sediments from oil and petroleum products. As a result of oil c...

Ecosystems are subject to a combination of recurring anthropogenic and natural disturbances, such as climate change and pesticide exposure. Biological com- munities are known to develop tolerance to recurring dis- turbances due to successive changes at both the community and organismal levels. However, information on how additional stressors may af...

The paper deals with modern technologies for decontamination of oil polluted water objects. The emphasis was put on complex technologies including bottom sediments cleaning. We have analyzed the efficiency of using technical devices and technologies for oil decontamination.

Considerable research efforts have been made to predict the influences of climate change on species composition in biological communities. However, little is known about how changing environmental conditions and anthropogenic pollution can affect aquatic communities in combination. We investigated the influence of short warming periods on the respo...

Climate change models predict an increase in the frequency and intensity of extreme fluctuations in water level in aquatic habitats. Therefore, it is necessary to understand the combined effects of hydrological fluctuations and toxicants on aquatic biological communities. We investigated the individual and combined effects of the insecticide esfenv...

Xenobiotics alter the balance of competition between species and induce shifts in community composition. However, little is known about how these alterations affect the recovery of sensitive taxa. We exposed zooplankton communities to esfenvalerate (0.03, 0.3, and 3 μg/L) in outdoor microcosms and investigated the long-term effects on populations o...

The sensitivity of seven zooplankton species (Daphnia magna, D. longispina, D. pulex, Simocephalus vetulus, Scapholeberis mucronata, Eudiaptomus graciloides, and Cyclops strenuus) to an insecticide, sumicidine alpha was studied. LD50 values upon a 24-hour exposure were determined. Daphnia pulex and D. longispina turned out to be highly susceptible...

Using aquatic worms (Oligochaeta: Tubificidae) for oil decontamination of bottom sediments has been first considered. In a set of experiments on Limnodrilus hoffmeisteri Claparede, 1862, worms survived the exposure to oil content as high as 16.72 g/kg; they died of natural causes. Vigorous silt agitation by worms (bioturbation) was observed: the si...