Into the loamy sand and sandy loam introduced the insecticide Spintor 240 SC,
containing active substance spinosad, in the field dose, 5, 10 and 25 times larger. After treatment
soil of spinosad o-diphenol oxidase activity was significant changed, but effect of spinosad was
not connected with dose of insecticide. Effect of spinosad depended on soil properties: in loamy
sand induced stimulation, but in sandy loam induced inhibition of o-diphenol activity.