272 Repokt of the Entomologists of the 



The same number of rows of miiskmelon were treated in same 

 manner. These measures Avere started May 25, that is, we did 

 not wait for the beetles to appear before making the first treat- 

 ment. With the exception of the covers the treatments were 

 repeated as follows: June 1, 11, 14, 23, and July 6. "Where 

 Paris green was used in water or dry, the vines were replanted 

 whenever killed. 



A summary of the notes shows that none of the above measures 

 except the covers kept all the beetles away and in a few cases the 

 beetles worked through and under the covers. As soon as a cover 

 was removed, the beetles would attack the plants, and where the 

 covers were left over until the vines were ready to run, the plants 

 were twisted and injured by the wind after the covers were re- 

 moved, so that the plants were worthless. 



During the first ten days a few dead beetles were found around 

 the plants treated with dry Paris green. 



In all other places where Paris green was used, also in all cases 

 where the laurel green was employed, no dead beetles were found. 

 In every case where air-slaked lime was used, the plants were 

 stunted. 



Of all mixtures and combinations of mixtures the Bordeaux 



mixture gave the best results. The resin-lime mixture answered 



as well as the Bordeaux mixture simply because it contained lime. 



Kerosene and turpentine used with air-slaked lime or with 



land plaster gave no better results than air-slaked lime used alone. 



Where all the above substances were used, the beetles worked 



on the under side of the leaves and gnawed the stems below the 



surface of the ground or wherever they could find a spot not 



covered with an unpalatable substance. Rags and cobs soaked in 



kerosene were absolutely worthless ; none of the vines were saved 



by these substances. The same was true of tobacco dust. In 



fact, the beetles would feed on the leaves that were dusted with 



tobacco and if disturbed would hide in it, where piled around 



the base of the vines. 



