JOS 



JOUENAL OF AGRICULTUEE OF P. K. 



Control. — This pest may be controlled by spmying the i)lants 

 with arsenate of lead three ponnds in fifty gallons of water. 



Chchj)ii(iri)li<i (ir<)us var. geuiculata. 



The sweet potato is also attacked by anotlier tortoise l)eetle. It 

 is much larger than the preceding species, and is a lirick red in color, 

 marked with numerous black dots. 



Its habits are very similiar to the preceding species, and it may 

 be controlled by similiar means. 



SWEET POTATO FLE.v-BEETLE (Ckoetocnema apricaria). 



This minute bronze-green fiea-beetle. wliicli usually lives on the 

 wild morning glory, is very fond of the sweet potato foliage, and 

 often causes injury liy its feeding activities. 



It may he controlled by dusting the plants with a mixture of 

 equal parts of arsenate of lead and air-slacked lime or dry, leached 

 wood a.shes; or by spraying the plants with arsenate of lead three 

 pounds ill fifty gallons of water. 



Fig. 62. — Sweet Potato Hoot Borer (Vtilas formicarius). .\iliills mi sweet [)Otato. 

 THE SWEET POTATO ROOT-BORER (CijUts furmicariiui) . 



The sweet potato root-borer is a slender lieetle about one-fourth 

 inch long and l^luisli black in color, except the thorax and legs which 

 are rufous. 



The eggs are deposited in small cavities hollowed out of the stem 

 of the potato plant. Small white grubs liatch from these and huirow 



