154 



PESTS OF GARDEN AND FIELD CROPS 



:,;ec'*'^ 



Fig. 157. — Larva of the Asparagus 

 Beetle. Enlarged and natural size. 

 Original. 



to pupate. There are two to 

 four generations annually. 



To control, permit a few 

 shoots to grow up at once, 

 and poison with Paris green the 

 beetles and grubs on these. 

 Collect the shoots desired for 

 the table or market at frequent 

 intervals. Fresh, air-slaked 

 lime dusted on the grubs will 

 kill them. 



The Twelve-spotted Asparagus Beetle {Crioceris duodecimpundata L.) 



Injury by this species to the young shoots is much the same as 

 that due to the common asparagus beetle. Holes are dug and the 

 surface is eaten both by the grubs and by the adult beetles. 

 Later, when the tops are 

 grown, the adults tend to 

 feed largely on the substance 

 of the berries. 



The adult beetle is one 

 fourth inch long, orange in 

 color, with six black dots on 

 each wing cover. The grub 

 is three tenths of an inch 

 long, with yellowish body and 

 brownish head. There are 

 from two to four generations 

 annually. 



Control is the same as that for the common asparagus beetle. 



Fig. 158. — The Twelve-spotted Aspara- 

 gus Beetle. Enlarged and natural size. 

 Original. 



Tortoise Beetles attacking Sweet Potatoes 



As soon as sweet potato plants are set out in the field they are sought 

 out by odd little insects known as tortoise beetles. Holes are eaten 



