The purpose of the research: to conduct commission and field testing of efficacy of the supramolecular complex of triclabendazole «Triclafascid» applied at the dose of 2,5-3,0 mg/kg against cattle fasciolosis. Materials and methods. Commission and field testing of Triclafascid were carried out in the private sector of the Chechen Republic in March-April 2017 on cattle naturally infected with Fasciola. Commission testing was performed on 30 animals infected with Fasciola that were divided into two equal groups of 15 animals each. Animals from the first group received triclafascid orally at the single therapeutic dose 2,5 mg a.i./kg (therapeutic dose 25 mg/kg) in water solution. The second group of animals as well as the first group received the substance of triclabendazole at five times lower dose (2,5 mg/kg) in water suspension. In field experiment, triclafascid was given individually to 108 animals at the dose of 3,0 mg a.i./kg (therapeutic dose 30 mg/kg) with compound feed. To determine the grade of animals’ invasion with fascioles, fecal samples were examined by Fuelleborn's method using ammonium nitrate. The average number of Fasciola eggs in 1 g of feces was defined with the use of VIGIS counting chamber. Fecal samples were investigated; the efficacy of the preparation was evaluated 30 days after dehelmintization. The efficacy of triclafascid was estimated by a «critical test» according to the Manual approved by World Association for the Advancement of Veterinary Parasitology (1995). Results and discussion. In commission testing of triclafascid for the treatment of cattle fasciolosis individually orally in water solution at the dose of 2,5 mg /kg and in field experiment at the dose of 3,0 mg /kg with feed compound at five times lower dose, 100 % efficacy was reached (in comparison with triclabendazole).

Методами механохимии получены перспективные многокомпонентные композиции препаратов для комплексной защиты растений на основе тебуконазола. Применение в этих процессах глицирризиновой кислоты и ее натриевой соли позволило получить протравители семян на основе тебуконазола с улуч-шенными физико-химическими, технологическими и биологическими параметрами. Испытания препа-ратов в лабораторных и полевых условиях показали синергизм биологических свойств, проявляющихся в ускорении роста культурного растения, снижении пораженности корневой системы яровой пшеницы и ярового ячменя обыкновенной корневой гнилью и увеличении их продуктивности при снижении нормы расхода действующих веществ препаратов. Показано, что межмолекулярные комплексы тебуконазола на основе глицирризиновой кислоты и ее натриевой соли обладали высокой биологической активностью при сниженном расходе препарата. promising multicomponent compositions of preparations for complex protection of plants based on tebuconazole were obtained using mechanochemical methods. The use of glycirrhizic acid and its sodium salt in this processes allowed obtaining of seed desinfectants based on tebuconazole with improved physicochemical, technological and biological parameters. The preparations tests in laboratory and field conditions have shown the synergism of biological properties, appeared by growth acceleration of the cultivated plant, decrease of the root system infestation of the spring wheat and spring barley by common root rot and productivity increase at lower application rates of preparations active substances. It has been shown that intermolecular complexes of tebuconazole based on glycirrhizic acid and its sodium salt possess high biological activity at lower application rates of preparations.

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The paper demonstrates the prospects of applying Arabinogalactan for mechanochemical modification of physicochemical and biological properties of antihelminthic substance. The study evaluates the parasitocidal effect of ivermectin (IVER) and albendazole (ABZ) compounds with Arabinogalactan (AG) in the form of solid dispersions (RD) in sheep intestinal helminthiasis. The authors tested compositions of new specimens with the active substance (DV) of ivermectin with three batches of arabinogalactan from different manufacturers in the ratio of 1:10 and compositions of IVER+ABZ+AG in the ratio of 1:1:10.  The experiments on parasitocidal activity of compositions in intestinal helminthiasis were carried out on spontaneously invaded sheep in Shebala district of the Republic of Altai, where 16 experimental and 2 control groups of animals were arranged following the principle of analogues. The sheep received the specimens on an individual basis: as a water suspension orally; composition of IVER+AG dosed as 0,1; 0,05 and 0,025 mg per a kilo of animal weight; composition of IVER+ABZ+AG - in calculation of IVER+ABZ - 0,1 and 0,2 mg of water suspension, albendazole 1, 2, 3 and 5 mg per 1 kg of animal weight. The experiment has shown that parasitocidal activity of laboratory samples of mechanical compositions of ivermectin and different in degree of purification of AB lots do not differ significantly. It is supposed that parasitocidal compositions can be used for non-pharmacopoeia AG samples of animals, which will reduce significantly the cost of the specimen. The efficiency of the composition of IVER+AG dosed 0.1 mg per 1 kg of animal weight is significantly higher than that of the initial specimen. Mechanical composition IVER+ABZ+AH dosed 0.2 mg of hemectin and 2 mg of albendazole per a kilo of animal weight is highly effective (100%) against sheep intestinal helminths and it assumes the possibility of significant (five times) decrease of AHZ dose in the composition with AH without loss of helmintocidal activity.

The purpose of the research is to study the influence of various technological factors on obtaining of complex solid dispersions of anthelmintics with polyvinylpyrrolidone and licorice extract on anthelmintic efficacy in experimental trichinellosis of white mice.Materials and methods. The study of the nematodocidal activity of complex solid dispersions samples based on fenbendazole (FBZ), fenasal (FNS) and praziquantel (PZQ) with polyvinylpyrrolidone (PVP) and licorice extract (LE) obtained by mechanochemical technology at different ratios of components and different exposure times was carried out on 130 white mice experimentally infected with Trichinella spiralis in two experiments. On the 3rd day after infection, the animals were divided into experimental groups of 10 animals each. Samples of various complex solid dispersions of anthelmintics were administered intragastrically to the mice of the experimental groups at a dose of 2 mg/kg according to the active substance. FBZ substance was used as the basic drug at a dose of 2 mg/kg according to the active substance. Animals of the control groups did not receive the drugs. The animals were killed by decapitation on the 4th day after experimental drug samples administration, and the activity of the drugs was counted according to the results of helminthological necropsy of the intestine, the efficacy was calculated by the type of control test.Results and discussion. The efficacy of complex solid dispersions of FBZ and FNS with PVP polymer was higher in comparison with the activity of complexes with LE at the same duration of mechanochemical treatment in a roller mill. The FBZ activity decreased from 67.05 to 37.77% with a decrease in the duration of mechanochemical treatment from 24 h to 5 h and the efficacy of the FBZ : FNS complex with LE turned out to be almost at the level of the basic drug when treated for 1 h. The use of mechanochemical technology for obtaining of a solid dispersion of FBZ : FNS with PVP for targeted delivery makes it possible to increase the anthelmintic efficacy by 2.7 times compared with the activity of the FBZ substance, and with LE by 2.2 times. It was noted that complex solid dispersions of PBZ with PZQ have lower biological activity in comparison with compositions of FBZ with FNS.