32 



FARMERS BULLETIN 860, 



The}' work almost entirely in 

 the hn^er of trash which covers 

 the runners and will not be 

 found beneath • the surface of 

 the soil itself. The mature 

 worm (fig. 27) measurer about 

 five-eighths of an inch and has 

 a body of a pale, smoky color, 

 with a brown head. 



Treatment. 



fall plooding. 



The treatment which gives 

 the most complete control, 

 amounting practically to ex- 



FiG. 28.— Cranberry toadDug : Short-winged termination of the WOrmS, is the 

 form of adult. Much enlarged. n ■,■, n -,• » .i i c 



tall flooding of the bog tor a 

 period of one week, beginning the latter part of September and 

 certainly not later than the first week in October. The object is 

 to get the water on the bog while the worms are naked and before 

 they have formed cocoons. If flooding is practiced after the worms 

 have cocooned, the water may be kept on the bog all winter without 

 injuring them. The difficulty in carrying out this method of control 

 is either a lack of storage water or the lateness in ripening of the 

 fruit, 



LATE HOLDING OF THE WINTER FLOWAGE. 



ISIaintaining the winter flowage until July 20, with the consequent 

 loss of the current season's crop, is the method frequently used to 

 check severe infestations. If disastrous frosts are not met the fol- 

 lowing year, the crop of that year may be expected to be about 

 double that of a normal season. Holding the winter flowage until 

 July 1 permits some of the moths to emerge from their cocoons, 

 but holding until August 1 is likely to prevent a good set of buds 

 for the following year. 



SPRING REFLOWING. 



No dependence can be placed on spring reflows as a control measure 

 against the ci-anberry girdler. even on those lasting as long as 5 days 

 dui'ing the period of pupation. 



]Many bogs can not be fall flooded, and on some the winter flowage 

 can not be held until July 20. P'or these there seems to be no recourse 



