1728 



ENCYCLOPEDIA OP PRACTICAL HORTICULTURE 



BSIS 



Fig. 2. (1) Work of Tuber Moth on Potato. (2) Cross-section of Potato Showing the 

 Interior Work of the Potato Tuber Moth. (Essig, M. B. Cal. Hort. Com.) 



of a light brown or amber color, with the 

 abdomen dark excepting an extreme pos- 

 terior band around each segment, which 

 is amber and gives a decided striped ap- 

 pearance. The antennae are long and 

 filiform; legs large and strong. There 

 are two noticeable horn-like processes on 

 each side of the posterior end, which 

 stand perfectly upright. They are light 

 in color and slightly hairy. The ends of 

 all spines are black. The length of the 

 adults varies considerably, but the 

 largest are one and three-quarters inches 

 long. This species is separated from 

 others by having five inner spines above 

 on the hind tibiae, the third and fourth 



of which have the greatest interspace be- 

 tween them. 



They are often responsible for consider- 

 able damage to potatoes before they are 

 dug. The tubers are gnawed so as to be 

 unfit for keeping or selling. Occasionally 

 a large proportion of the crop may thus be 

 injured, but this is more likely to happen 

 only in small places. 



Control 



The most injury is done in fields 

 placed under cultivation for the first time 

 or lands left for some time to sod or 

 pasture. Well cultivated fields seldom if 

 ever suffer from the attacks of this pest. 

 Clean cultivation around the fences so as 



