The equipment is intended for chemical protection of potato seed tubers from pests and diseases by surface spraying on a potato planter directly during planting. Three versions are made: SDK-1.x - for installation on a planter L-207; SDK-2.x - universal, can be mounted on potato planters of any models and manufacturers; SDK-3.x - the front frame of the tractor is mounted. Pump drive from a DC motor (12 V).