EXPERIMENT STATION REPOET. 639 



April opened warm and farced deyelopment. General examinations 

 were made April 12th and 30th, and notes were made at intervals 

 during the month, as individual trees started and developed. At the 

 €nd of the month and early in May, cold winds and almost freezing 

 temperature checked development until the early start had been neu- 

 tralized and a normal seasonal development was noted. 



May 19th, all the apples and most of the pears were sprayed with 

 arsenate of lead, one pound to twenty gallons of water, until the 

 leaves dripped. On the 25th, used soluble petroleum, one to thirty, 

 on cherry and rose, to kill plant lice, and on the 27th noted that, 

 while most of the insects had been killed, all the foliage was more or 

 less injured. Nevertheless, as a further test, sprayed parts of trees 30, 

 ■32, 33 and 40 with the same, one to thirty mixture, and failed later 

 to find any material injury. 



May 29th, sprayed all apple trees a second time with arsenate of 

 lead, one pound in fifteen gallons of water. 



June 11th, sprayed parts of trees 42 and 43 with Tak-a-nap soap, 

 at the rate of one pound in four gallons of water, to determine effect 

 on foliage as well as on the insects. No satisfactory results noted later. 



After an earlier examination to detemiine condition, examined for 

 scale development June 25th, finding several infested trees on which 

 breeding had not yet started. July 3d, these trees, 24, 25 and 26, 

 were again examined and plenty of larvae were found : the delay was 

 due to the shaded position of the trees, which seemed unfavorable to 

 the growth of the insects. 



July 5th, examined all the trees that were treated with "Kill-0- 

 Scale" October 14th, 15th and 19th, 1904, and found that all were yet 

 free from living young or signs of breeding. These trees, 1, 7, 8, 17, 23, 

 30, 32, 33, 34, 38, 39, 44 and 47, are all in excellent condition and in 

 strong contrast to those that were untreated. Sprayed trees 24, 25 

 and 26, and half of tree 2, with soluble petroleum, one to thirty. On 

 the 8th, sprayed Nos. 18, 19, 21 and half of trees 2 and 29 with fish- 

 oil soap, one pound in four gallons of water, producing only a tempo- 

 rary check in each case. At this time the effect of the drought 

 became noticeable, and in spite of occasional watering the dry July 

 materially checked growth. 



August 19th, made a general examination for record, and in the 

 evening sprayed trees 18, 19, 21 and 29, and the top of tree 38, with 

 fish-oil soap, at the rate of one pound in seven gallons of water — with 



