10 



THE LARGER CANNA LEAF-ROLLER. 



are not protected by gates; but this is not the case with our public 

 parks, Avherc the cannas grow in great profusion and are sufficiently 

 protected by frames and where warning is always given by the offi- 

 cers in charge to keep away from the growing plants. These arsen- 

 icals may be used with a knapsack or other hand sprayer in just about 

 the same manner as advised against the Colorado potato beetle in 

 Bureau of P>ntomology Circular 87, a copy of which may be obtained 

 on application to the Department of Agriculture. 



It can not be too strongly emphasized tliat whatever method is 

 used, Avhether si)raying or hand-picking, should be inaugurated early 

 in the season to ])revent serious injury later ou. 



Approved : 



James Wilson, 



Secretary of Agr'tciilttiic. 



AVashington, D. C, Decemher 2U, 1011. 



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