346 Bulletin 180. 



in the Bradlej' orchard near Somerset, Niagara Co. Trees affected 

 with the yellows or otherwise enfeebled showed little or no tendency 

 to curl. 



Estimating the Amount of Cukl. 



While the past season has not been favorable to the develop- 

 ment of peach-curl, it has been possible to make the estimates in the 

 following experiments with more than usual accuracy. In Mr. 

 Lutts' Elberta block of one hundred and seventy-six trees, the curled 

 leaves were all counted. The same method was used in Mr. Wright's 

 orchard of one hundred and thirty-eight trees. With this experience 

 as a basis and by tedious comparisons of row with row and tree with 

 tree, stopping again and again to correct the estimates by actual 

 counting, I have obtained the results given in the tables to follow. 

 As a further precaution against error, all records of treatments were 

 left behind when the estimates were made ; and, in nearly every 

 case, the owner of the orchard has kindly accompanied me to check 

 the results. 



Experiment I. 



This is a continuation of the experiment described in Bulletin 

 164, pp. 379-380. The frontispiece, taken from Yig. 68 of that 

 bulletin, shows the effect of early spraying as compared with 

 late. The row on the right received its spraying with Bordeaux on 

 April 8, the one on the left May 10. From the experience of the 

 past year, we can add very little to the results already published for 

 this block. Following is the plan of the experiment with a tal)le 

 showing the treatments used and their comparative effects on the 

 curl. Early in tlie season aphis and bud moth appeared in abund- 

 ance, and a hail storm later on still farther complicated the injuries, 

 so that the effects of the solutions on the foliage were not estimated. 



