抄録
The author tried for potato disease control a low-pressure, low-gallonage field sprayer in combination with the ordinary Bordeau wettable powder mixture, Dithane, and Calcium arsenate. The analysis of the result suggests the use of this type of the sprayer with tractors, both for a better disease control and for the increase of annual use of the tractor. Also shows economical advantages of this type of the sprayer.
