METHOD FOR CALCULATING OF THE CATTLE PRODUCTIVITY LOSS CAUSED BY AN ATTACK OF THE GNUS COMPLEX

Abstract

Two-winged blood-sucking insects - mosquitoes (Culicidae), gadflies (Tabanidae), midges (Simuliidae) and biting midges (Ceratopogonidae), cause considerable con-cern to agricultural animals and reduce their productivity in the summer grazing season. The aim of the work is to obtain more accurate objective data on the expect-ed degree of decrease in animal productivity, depending on the abundance of both individual components of gnats parasitizing on them and gnats in general, needed to determine the thresholds of the harmful numbers of these insects, the appropriate-ness, nature and extent of the corresponding events. The article presents data on the calculation of cattle productivity losses caused by the attack of the gnus complex.The article presents the formulas for calculating the definition of insect insect com-plex "cattle" for cattle, in particular for cows, including an assessment of the ef-fect of these insects on the productivity of animals, achieved by the fact that the comparative quantitative injuriousness of individuals from each of the families of bloodsucking dipterans or gnat components the average weight of their females who were sucking blood, and the harmfulness expressed by the degree of decrease in the productivity of the affected animals was calculated depending on the average about the abundance of parasitic insects (gadflies, mosquitoes, midges and biting midges) detected during the periods of their highest daily activity during the mass flight sea-son by taking one-time, 5-minute, 15-minute or daily counts for animals in a herd or humming top-shaped traps (for gadflies) on pasture.