New York Agricultural Experiment Station. 403 



This injury was more marked where insecticide soap was used, 

 apparently due to the fact that more of it would dissolve in a given 

 amount of water, whereas with homemade soap, used 1 to 5, some 

 of the material always remained undissolved in cold water. 



conclusions as to methods of control. 

 The experiments herein described indicate plainly that of the two 

 methods of control — flooding and spraying — the former is to be 

 preferred if submersion of the bog is possible. Spraying the plants 

 proved in the main less satisfactory as measured by the numbers 

 of the bugs destroyed and the injury to the plants. Damage to 

 cranberries may apparently arise from the use of too strong mixtures 

 of soap, by too liberal applications of the spraying materials or 

 by early treatments when the vines are in blossom. Further experi- 

 ments with contact insecticides are desirable in order to determine 

 conclusively the practicability of combating this pest by the applica- 

 tion of spraying mixtures. 



DIRECTIONS FOR CONTROLLING THE CRANBERRY 



TOAD-BUG. 



From the knowledge of the life history and habits which has been 

 so far ascertained, flooding should be deferred until from the first 

 to the middle of August for sections in the same latitude as New 

 York City. If submersion is practiced earlier than August 1 some 

 nymphs may make their appearance after the water is removed, while 

 if postponed until after August 15 eggs may be deposited in the bog 

 which would permit reinfestation of the vines in the following summer. 

 In selecting a date, some allowance should also be made for seasonal 

 conditions. On the basis of the experiments previously described 

 a cloudy period should be selected for flooding. The water should 

 be turned on in the evening so that the bog will be completely covered 

 by the next morning. Advantage should be taken of a favorable 

 wind in order that the bugs may be floated ashore. Grass and weeds 

 should be removed from the bog before flooding, while similar growth 

 about the margins of the marsh should be mowed. Kerosene oil 

 should be applied as a spray to all insects and debris floating on 

 the surface of the water. Thick grass, weeds and drift on the shore 

 should be burned by means of the burning torch-spray. If these 

 precautions are carefully followed practically all of the insects can 



