27 



astonishing crop of fruit. The trees were sprayed April 29th with 

 Bordeaux mixture, Mny 19th and June 9th with the Bordeaux 

 mixture and Paris green, and July 12th with the ammoniacal carbon- 

 ate of copper. 



The trees were heavily loaded with fruit, notwithstanding what 

 seemed like heroic thinning. Very few black warts were found upon 

 them and the fruit rotted very little. 



The location was favorable in every way, being on an elevation 

 and in rather light soil, and the weather very unfavorable for the 

 development of the spores of the brown fruit rot. It is seldom that 

 trees so heavily loaded with fruit escape this disease, and had there 

 been rains and a higher temperature during the month of Jul}', the 

 last spraying of ammoniacal carbonate of copper would have been 

 washed off and the fruit very likely have been destroyed by the rot. 

 As no check trees were provided, there is some uncertainty as to the 

 results of this experiment, but viewed in the light of the results 

 obtained in similar experiments made at the Hatch station, we feel 

 confident that tlie applications made assisted largely in. preserving 

 the crop, and preventing the growth of the black wart. 



REPORT OF A. C. HAWKINS, 



LANCASTER, MASS. 



Mr, Hawkins treated plum trees only, and owing to the delaj- in 

 receiving the pump and materials, was unable to make the applica- 

 tion of the strong solutions of sulphate of copper or iron before the 

 leaves unfolded. He reports as follows : 



" I think the results would have been more satisfactory had the 

 pump arrived in time to spray the trees before the buds had begun to 

 open. Application of the Bordeaux mixture was made May 1st, 12th 

 and the 28th. This experiment was on young trees, only three years 

 old, that I did not wisli to bear fruit, so no Paris green was used, as 

 would have been the case if it was desired to protect the fruit from 

 the plum curculio. All old warts had been cut off and burned before 

 the spraying, and the new warts seemed to start into growth about 

 the time the buds unfolded. 



While I think the spraying destroyed many spores and prevented 

 a large increase of the warts, those that had become established were 

 not apparently affected. The old trees that had the warts cut 

 off were headed back severely, and have thrown out a fine head 



