New York Agricultural Experiment Station. 615 



These traps covered about 4 square feet of surface. They were 

 made by inserting two barrel hoops into the ground in such a way 

 that the hoops met at the centre and formed an arch like the 

 centre-arch of a croquet set. The cheese cloth was placed over 

 these and fastened to the ground at the edges by covering with 

 dirt. 



Some of the midges were noticed flying to the flower buds the 

 (lay (April 19) the traps were set. 



These traps were examined by Mr. Cornell on April 27. The 

 midges were so numerous under each of the traps that no esti- 

 mate of the difference, if any, could be made. 



When the infested fruit was examined, May 9, 1895, there 

 was a slight difference in favor of the treated orchard in the 

 amount of damage done by the midges. In fact, there was no 

 fruit to speak of on the Lawrence trees in the old untreated or- 

 chard, while in the young orchard, which had been treated with 

 kainit, there was about one-fourth of a crop. 



During June. 1S95, Mr. Cornell made a second application of 

 kainit to the young orchard, using about the same amount as 

 on the previous year. The main difference in the treatment this 

 year was that the kainit was sown at the time the young pears 

 were dropping to the ground. 



At Newburgh, Aj)ril 18, 1806, five traps were set in Mr.. Cor- 

 nell's orchards. Two were placed in the young orchard which 

 had received applications of kainit two years in succession; one 

 was placed under the tree which was treated with kainit, April 

 15, 1895, and two were placed in the old untreated orchard. 

 Under one of the latter traps, the sod was spaded over to a uni- 

 form depth of four inches before setting. Some of the midges 

 were noticed issuing about noon on the same day the traps were 

 set. The traps were examined on .\pril 21. We found that 

 where kainit had been applied, even where it had only been ap- 

 plied once, there was only one midge under these traps to where 

 there were five hundred under the traps over untreated ground. 

 In the case where kainit was only applied one year the tree was 

 somewhat isolated, so that too much dependence cannot be placed 



