А biotic potential of a red fruit tick (<i>Metatetranychus ulmi</i> Koch.) against the background of acaricides' use
A comparative evaluation of a biotic potential of a red fruit tick on apple trees is given. The decreasing of a biological effect after repeated use of acaricides and emergence of acaricide-resistant red fruit tick emergence have been discovered. The meaning of a clear reproduction (R<sub>0.</sub>> 1), points at ability of population to restore after acaricide Envidor KS, Ortus SP, Sunmight, SP, Demitan 200 SC, Masai, SP use. After use of acaricides Kraft, VDG, Oberon Rapid, KS (R<sub>0</sub>)<sub>. </sub>< 1, it shows dying of the pest population.