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The results of the implementation of high-porous cubic boron nitride (CBN) grinding wheels in the operation of double-sided deep grinding of the fir-tree profile of the locking element of the turbine blade are presented. The features of designing the working layer of the CBN wheel for this operation are described. Recommendations for the selection of the characteristics of diamond dressing rollers are formulated. The principles of organizing an efficient production process when introducing CBN grinding wheels are described. [ABSTRACT FROM AUTHOR]

Background: Henosepilachna vigintioctomaculata is a polytrophic pest, causing the greatest damage to plants from the nightshade family. The study aimed to research the resistance of potato cultivars that are promising for breeding to damage by a potato ladybug in laboratory and field experiments. Methods: In laboratory experiments, the indicators of fertility, mortality and duration of development, morphological anomalies and the effect of potato varieties on the composition of Epilakhna's hemolymph were studied. The sample consisted of 50 individuals with a slight predominance of females. The experiment used 13 varieties of potatoes. Result: A specific dependence of the frequency of phytophage anomalies on the variety was revealed. The influence of nutrition on survival and the timing of ontogenesis has been established. The results obtained indicate the high breeding value of the material when recommending it for cultivation in regions with a high number of pests, as well as when creating new varieties. [ABSTRACT FROM AUTHOR]

Background: Horseradish is a valuable agricultural crop with gastronomic and medical significance. It contains mono- and polysaccharides, protein compounds and organic acids, minerals and starch, as well as a rich vitamin complex. Unfortunately, horseradish diseases are still insufficiently studied, while crop losses from them can be quite significant. The purpose of our study was to determine the composition of pathogenic fungi on horseradish Armoracia rusticana G. Gaertn., B.Mey. & Scherb. and to develop measures to combat them. Methods: The research was carried out on horseradish “Atlant” varieties in the plantings of the of FSBSI “Far East Federal Research Center of agrobiotechnology n.a. A.K. Chaika” at 2019-2020. Studies of phytopathogens were carried out in the field conditions and in vitro. Microscopy was performed using Levenhuk D740T, 5,1 MP. Lifelong injuries photofixation was performed using Sony SAL1855. Processing of the microscopy results was carried out using Outfi, PluriIQ, CellProfiler software. In the experiment to study the agent fungicidal efficacy against horseradish diseases, we used: Acrobat WG, Bravo SC, Zummer SC, Consento SC, Infinito SC, Topaz EW, Ordan SP, Thiovit Jet WG, Rajok EW, Proton Extra RG, Ridomil Gold MZ RG. The agents were diluted in doses of 10%, 30% and 70% of the recommended dose, the index of conidia occurrence was calculated, phytotoxicity was carried out. Result: For five iterations, the greatest fungicidal activity was demonstrated by the Acrobat WG, Topaz EW and Proton Extra WG agents. The maximum effectiveness was observed for the agent Ridomil Gold MZ WG. The lowest efficiency was shown by the Infinito SC, Consento SC, Ordan SP, Thiovit Jet WG agents. No phytotoxic effect was found in any of the agents. [ABSTRACT FROM AUTHOR]