The research was conducted in the individual farm located in Opolskie Province. The purpose of investigation was the analysis of intensity of expenditure on chemical plant protection in cultivation of winter wheat, seed rape, sugar beet and potatoes. The expenditure on plant protection was expressed by pesticides usage in 1kg of active substance per 1 ha, the value PLN, treatments multiplicity and the costs of chemical treatments performance. The profitability was determined using guide profitability indices. Ten year analysis proved that since 2004 year the expenditure on plant protection had been increasing in each particular cultivation and its profitability had been getting worse despite the increased prices of the protected product and the yield obtained.