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



Plate III. 





Pig 



?■= -sax iikS i 5v < ? , l s wf^ : 





Sprayed and Unsprayed Rows of Globe Artichoke. 



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

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



