The effect of different doses of cattle liquid manure, with or without the VIT-TRA agent, on the mites of permanent meadow, with species analysis of oribatid mites (Acari, Oribatida) was investigated. Samples were taken from 13 plots, fertilized with cattle liquid manure in doses 40, 60 and 80 m3· ha-1 and VIT-TRA agent. The dose 40 m3· ha-1 increased the abundance of mites, comparing to the control plot, while doses 60 and 80 m3· ha-1 decreased it.
The fungicidal agent, with medium and high dose of fertilizer, signifi cantly decreased the density of Oribatida, Gamasida and Actinedida in relation to small dose of fertilizer with this agent. The mites reacted in a similar way to the bactericidal agent, but acting of virocidal agent was indistinct. The Oribatida dominated among the mites, while the Actinedida and Gamasida were less abundant. Among the Oribatida the most abundant were: Parachipteria bella,
Liebstadia humerata, Achipteria coleoptrata and Scheloribates laevigatus. The Oribatida preferred the lower part of grasses, and their density distinctly decreased with the soil depth.
