404 Eeport of the Department of Entomology. 



be killed. Such complete extermination is not often met with in 

 the control of an insect pest. 



In flooding a bog to destroy this pest a word of caution is urged. 

 A study of the life cycle of the bug and of its different forms and 

 habits indicates that only the long-winged forms migrate under 

 natural conditions; and it appears more than probable that even 

 this form does not migrate very long distances. Carelessness in 

 flooding during the summer would undoubtedly distribute them 

 faster than any other method. It seems very doubtful if they are 

 ever distributed by the transportation of the vines; because, first, 

 the eggs rarely, if ever, remain on the vines; and second, the vines 

 for transplanting are usually taken before the eggs hatch. 



On what are known as " dry " bogs, where no method but spraying 

 can be adopted, the following suggestions are offered: First, in 

 cases where the vines are heavy and contain much old wood, mow 

 the vines off at the usual season for cutting. Second, between August 

 1 and 15 spray thoroughly with a soap solution made with any of 

 the three soaps — insecticide soap, resin-potash soap, or homemade 

 fish-oil soap — 1 pound to seven gallons of water, applying at least 

 200 gallons of solution to the acre at each application and making 

 two applications. By this method there would be no fruit to be 

 injured with the soap solution, as cutting eliminates a crop of fruit 

 for one year. In plantings where vines are very thin the cutting 

 might be dispensed with, but would probably be a good cultural 

 method even in such cases. 



ACKNOWLEDGMENTS. 



The senior author wishes to thank Messrs. Brown and Wood- 

 hull for their assistance in furnishing materials, apparatus and men 

 free of charge for carrying out the tests made; for taking all the 

 risk of damage to the crop by treatments tested; and for general 

 assistance which has helped to round out this report. 



