Control of the spread of potato moth at the use of mebrocarboxylic mixtures

Abstract

Goal. To minimize the consumption of methyl bromide in the mixture with carbon dioxide in the states of saturated vapor and supercritical fluids, while maintaining their 100% technical efficiency against potato moth (Phthorimaea operculella Zell.) in fresh potato tubers. Methods. Analysis of knowledge systems in the areas of physics, chemistry and biology for more detailed information on physicochemical properties of the fumigant, biological characteristics of pests, etc.; analogy (simulation), namely the application of norms of consumption of fumigant, time of exposure to species with similar morphological and biological characteristics; study of the scientific sources (paper and electronic), books and laws and regulations in sphere of fumigants; expert estimates — acquaintance of experts with the task of research in order to obtain useful recommendations; experimental — conduct fumigation treatment in the laboratory with necessary equipment (fumigation chamber, gas analyzing devices, etc.); mathematical-statistics — B. O. Dospehov’s method, computer mathematical functions embedded in Microsoft Excel 2010. Results. The rate of flow of methyl bromide in the mixture with carbon dioxide in the states of saturated vapor of carbon dioxide fell by half, and supercritical fluid CO2 — 4 times. Conclusions. The quarantine treatment using the method of fumigation of fresh potato tubers with a mixture of carbon dioxide and methyl bromide against quarantine pests (potato moth) is possible in the dose of CH3Br which is 4 times lower the dosage it applied in its pure form.