INSECTS INJURIOUS TO TOBACCO. 235 



controlling this j^est is that of hand-picking. This is, 

 however, both tiresome and expensive. I am informed 

 that in southern Maryland this task is willingly done by 

 large flocks of turkeys, which are kept largely for that 

 purpose and fed on little else during the time the worms 

 are most numerous. 



In many parts of Kentucky a spray of Paris green has 

 been used against the Tobacco-worm. Against this there 

 has been more or less of a popular prejudice on account of 

 possible poisoning. Such a prejudice having also existed 

 against the use of this well-known arsenite upon apples 

 for the Codliug-moth and on numerous other crops, and 

 with no deleterious results, it seems safe to assume that 

 such a prejudice is unfounded. Xevertheless Prof. H. A. 

 Garman has made a careful test of such spraying, and 

 plants sprayed were analyzed by Dr. A. M. Peters, chemist 

 of the K3^ Agr. Exp. Station, who found that the amount 

 of arsenic left on leaves sprayed three times wdth a solution 

 of one pound of Paris green to IGO gallons of water would 

 not be sufficient to be injurious to the consumer. In the 

 numerous tests made, one-third of a grain of arsenic per 

 pound of tobacco was the most ever obtained, and would 

 hardly be injurious. Prof. G-arman (Bulletin No. 63, Ky. 

 Agr. Exp. Station) also made thorough tests as to the 

 efficiency of this method of controlling the worm, which 

 he found to be entirely satisfactory. Usually it will not 

 be necessary to spray over three times, if aj^plied at the 

 proper time. The time of these apj^lications will vary for 

 different latitudes and seasons, but should be made as soon 

 as the young of each brood make their appearance. In 

 general this will be early in July, early August, and middle 

 or late August. One pound of Paris green to 160 gallons 



