haps be the easiest to build) across the bog from these catchwaters, 

 dividing it into small areas of nearly equal elevation, and 

 thus allowing the water to be held up among the vines without cover- 

 ing them. These dikes need not be built at right angles to the 

 main ditch, but could be placed at angles to suit the general " lay " 

 of the surface of the bog. By this arrangement, the benefits of an 

 annual late holding of winter fiowage could be obtained without the 

 attendant injury. This method should get rid of the fruit worm 

 almost entirely, and in many cases, would also be of great value by 

 preventing injury from frost. In case of necessity, this method of 

 flooding the bog could also probably be made use of in fighting the 

 fire worm (see discussion under Fire Worm.) 



THE FIRE WORM. 



Eudetnis vacciniana (Pack.) 



This insect is rarely if ever troublesome in Massachusetts on 

 strictly dry bogs. Those which have water supply for quick and 

 repeated reflowage can also be easily kept free from this pest if the 

 water be properly handled, and such bogs are seldom infested to 

 any extent. Those bogs, many of them very large, which are win- 

 ter flowed and have at most a rather scanty reflowage are the ones 

 often found seriously infested, and the infestation is usually most 

 serious where the winter flowage is deepest. 



Parasites and winter killing of the eggs of this insect are appar- 

 ently the chief factors working against this pest on dry bogs, the 

 former probably being by far the more effective of the two. Winter 

 flowage will destroy the parasites present when the water is put on, 

 but this treatment, instead of also destroying the fire worm eggs, 

 seems to protect them against the severity of the winter. These facts 

 lead us to make the following 



Recommendations and suggestions for treatment : 



A. With Water:— 



I. Where bogs may be so treated it is advisable to divide them into 

 smaller areas by dikes, thus permitting the late holding of the winter 

 flowage on the higher sections, so that the lower sections can be 

 quickly reilowed at any time up to the end of the first week in June. 

 With a bog thus divided, all the sections could be covered with much 

 less water than would be needed to cover the bog as a whole without 



