S]VEET-POTATO 453 



through and ruins the maturing potatoes (Fig. 197). No 

 treatment is loiown except to avoid storing or bedding 

 anj- infested roots, which rnay be recognized by the bur- 

 rows ■ftitliin them. Care should be tal^en to avoid intro- 



FiG. 197. — Cross Section through a Stveet-potato. shot\-i>7o Ixju- 

 RiES BY Sweet-potato Root-boher. 



ducing this serious pest on sweet-potatoes brought east- 

 ward from the infested regions. 



For various leaf-eating insects, occasional^ attacking 

 the foliage of this plant, the recommendation is to dip 

 the slips, before being set, in a solution of arsenate of lead, 



