Research object - pests - western flower thrips, potato moth, American tomato moth, Mediterranean fruit fly, tobacco whitefly; components of fumigant mixtures - methyl bromide and carbon dioxide. The aim is to experimentally determine the minimum consumption rates of methyl bromide in mebrocarbon fumigant mixtures effective against Western flower thrips, potato and South American tomato moths, Mediterranean fruit fly and tobacco whitefly. Research methods - laboratory-field, mathematical-statistical, calculation. Apparatus - Fumigation chamber, gas measuring devices, scales. Тhe influence of mebrocarbon mixtures on western flower thrips, potato and South American tomato moth, Mediterranean fruit fly and tobacco whitefly was studied; the dependence of the toxic effect of mebrocarbon mixtures on the state of carbon dioxide during its introduction into the fumigation space was substantiated - the sensitivity of the investigated pests to mixtures with supercritical CO2 was 2 times higher than for mixtures with saturated carbon dioxide vapors; the lower toxicological parameters of the use of methyl bromide in mixtures with carbon dioxide were achieved, which ensure a decrease in CH3Br dosages up to 75% of the cost rate when using exclusively methyl bromide; the effective minimum concentrations of bromomethyl in mebrocarbon mixtures have been determined; calculated lethal norms for mebrocarbon mixtures, which provide efficiency against the above-mentioned pests; it was found that when using mebrocarbon mixtures against the studied species, the lethal rates of hourograms decrease, depending on the state of carbon dioxide when introduced into the fumigation space, namely: 1.5-2 times for the vaporous state and 4 times for the supercritical state; it has been proven that with a decrease in the consumption rates of methyl bromide in mebrocarbon mixtures up to 4 times, compared with its classical use, the technical efficiency remains at the same level; the effective concentrations of methyl bromide in mebrocarbon mixtures with vaporous carbon dioxide at temperatures of 0 ° C and a pressure of 34.9 bar and 25 ° C and a pressure of 64.3 bar at the time of entering the fumigation space, which are 40 and 50% less than the consumption rates, respectively methyl bromide in pure form; - investigated the phytotoxic effect of mebrocarbon mixtures with consumption rates of methyl bromide 1.5-4 times less (depending on the state of carbon dioxide when introduced into the fumigation space) compared with the use of exclusively methyl bromide on fresh vegetables and fruits, flower cuts, vegetable seedlings, flower and ornamental and potted crops;
- the economic efficiency of the use of mebrocarbon mixtures (the level of profitability was 1263.6-1566.7%) was assessed by the fumigation method, compared with the financial costs associated with the return of imported products to the exporting country in case of a quarantine pest. Scope (area) of use - quarantine and plant protection.
