Spraying Vegetables, Field-Crops 

 and Domestic Animals 



THE POTATO 



INSECT ENEMIES OF THE FOLIAGE 



The Colorado Potato-beetle deposits its orange- 

 colored eggs (a) in masses, varying in number from 

 a dozen to fifty or more, on the under surface of the 

 potato-leaf, and occasionally also upon the leaves of 

 grass, smart-weed, or other plants in the potato field. 

 They hatch about a week later into peculiar little grubs 

 (fo) that feed upon the foliage a few weeks. They 

 then descend to the ground, where just beneath the soil 

 surface, or under the rubbish above it, they change to 

 pupae {c). About ten days later they emerge as 

 perfect beetles. There are from two to four annual 

 broods, the number varying with the latitude ; and the 

 insect hibernates in the beetle state. 



Remedies — Spray with almost any of the arsenical 

 poisons. Arsenate of lead has been found best by the 

 Maine Experiment Station. The application should be 

 made as soon as the beetles appear, in order to kill off 

 the first brood, and it must be repeated as often during 

 the season as is necessary to keep the pests in check. 



The Flea-beetle is one of the most troublesome 

 insect pests affecting potatoes. Although very small 

 it appears in enormous numbers and eats small holes 

 in the surface of the leaves. They thus not only injure 

 the tissues of the leaf directly, but the holes they make 



