210 



Report of the Horticulturist of the 



ISeries 2. Italian Prune, Guii and Lombard were sprayed May 

 25 and June 24. 



Series 3. Italian Prune and Lombard were sprayed May 25, 

 June 17 and July 14. Guii was not included in this series for it 

 ripened its fruit in August and the last application July 14 would 

 be liable to show on the ripe fruit. 



Series 4. Guii sprayed May 25 and June 17. 



One hundred and sixty-eight trees were included in these exper- 

 iments, so it appears that the tests Avere sufficiently extended to 

 insure reliable results. 



Results. — Through the early part of the season the trees, 

 whether sprayed or not, showed but little of the leaf spot. Later 

 the disease became more noticeable, especially on the Italian 

 Prune. With this variety the trees in Series 2 showed- a little 

 more injury than coirrespondiiig trees in Series 1 and 3 but were 

 far superior to the unsprayed trees. 



As early as August 12 the ground under many of the unsprayed 

 Italian Prune was thickly strewn with fallen leaves and in conse- 

 quence of this loss of foliage the fruit was prematurely ripening 

 and dropping. At this time the unsprayed Guii trees had lost 

 some leaves but unsprayed Lombard were in nearly as good con- 

 dition as the sprayed Lombard. 



October 3 a careful estimate of the amount of loss or injury 

 to foliage was made from which the following summary is de- 

 rived. 



Injuky upon Spraykd and Unsprayed Plums. 



