Bui. 703, U. S. Dept.of Agriculture. 



Plate III. 



Wi?^W 



Sprayed and Unsprayed Rows of Globe Artichoke. 



The aphids Myzus hraggii and Aphis rumicis have been controlled in the row at left by spraying 

 ■with nicotine sulphate. The plants iu the row at right have not been sprayed. 



