New York Agricultural Experiment Station. 397 



on the egg-laying habits of the pest, as the turning on of the water 

 would compel the insects to live on the margins of the bog, where 

 they would be more readily observed. The water was turned on 

 October 2, 1912, and left on for 48 hours. Large numbers of the 

 adults came ashore on drifting leaves and rubbish. The workmen 

 hauled this rubbish up on the banks with rakes and later, as it dried, 

 burned it. Part of the adults were dead as they floated ashore, 

 but enough live ones came with them to blacken the weeds and 

 grass on the margins. (No oil was applied to the rubbish on this 

 marsh at the time of this flooding.) 



TESTS OF FLOODING, 1913. 



The experiments conducted during the preceding year demon- 

 strated conclusively that the bugs could be driven from an infested 

 bog by means of flooding. As both of the bogs previously described 

 showed, early in July, 1913, that they were still infested, it was 

 decided to flood both. Aside from the desirability of protecting 

 the cranberries from the insects, it was also felt that more informa- 

 tion was needed as to the most efficient use of the water as 

 a means of control, as well as the most effective methods of disposing 

 of the insects as they floated ashore. 



Bog No. 2. — Since Bog No. 2 began growth a trifle earlier than 

 No. 1 and was also through blossoming sooner, it was the first to 

 receive attention. After waiting for a cloudy period in order to 

 avoid scalding of the fruit, and a favorable wind, the water was turned 

 on in this bog at 6 p. m. of July 23. At noon the next day part of 

 the vines on one side were not entirely submerged, and many sedges, 

 " three square," and weeds on part of the bog were not covered. 

 (Plate XIII, fig. 2.) Fortunately the direction from which the wind 

 blew was such that the insects from the worst infested sections were 

 not carried to the portions not entirely submerged. The water was 

 left on all day the 24th. Three men with knapsack and compressed- 

 air sprayers worked a good share of the day spraying the weeds, 

 grass and margins of the water with pure kerosene, kerosene emulsion 

 (one part to seven of water), and homemade fish-oil soap (one 

 part to seven parts water). The men also waded out and sprayed 

 the bugs that were found collecting on sedges and weeds not sub- 

 merged. All three substances used killed large numbers of the bugs, 

 but for penetrating the rubbish that floated ashore and for spread- 



