258 STATE BOARD OF, AGRICULTURE. 



beneficial. It often becomes so numerous however, that it must be made away with 

 in order to save our crops, in which case it can usually be killed by a spray of Paris 

 green applied in the ordinary way, provided the insect is not too abundant. Paris 

 green acts slowly on it and the damage may be all done before the poison takes effect. 

 When they come in droves, it may be necessary to use other measures. It is said 

 that they easily drive when brushed with branches from a tree, and that they may be 

 driven from a field in this manner or driven into straw placed on the edge of a field and 

 there burned. It is also said that they dislike dust on their food-plants and that air- 

 slaked lime dusted on the plants will drive them away. If air-slaked lime is to be used, 

 it will be well to add one pound of Paris green to every one hundred pounds of lime and 

 to dust this on through coarse sacking or burlaps, after thoroughly mixing the whole 

 together. 



This old-fashioned potato-beetle is regarded as a southern species, which seldom 

 does much damage as far north as this, though occasionally it has been serious. In 

 his annual report for 1894, Mr. G. C. Davis, formerly of this station, records an invasion. 



