ations was most injured by the rot ; that on trees growing the most 

 rapidly rotted more than that grown on trees of only a moderate 

 growth. 



Black-Kriot. One of the results of the use of fungicides on the 

 plum trees in the station orchard has been that scarcely a specimen 

 of the black knot can be found on any of the trees, though no knots 

 have been removed for about a year. For treatment of the plum, 

 see Spraying Bulletin. 



Summer vs. Winter Pruning. 

 To determine whether heading in plum trees while dormant or in 

 the early stages of summer growth would give the best results 10 

 trees, two each of five kinds were selected. The first tree of each 

 variety was severely headed on ]\Iarch .'^0 and the second May 22, 

 with tfee following results : 



The wmter pruned trees made a vigorous growth of a few shoots. 

 " summer " " " fair " " many " 



" iciyiter " " developed a fair quantity of fruit buds. 

 " summer " " " large " '' " 



The following new varieties have given the best results. 



DOMESTIOA. 



Thomas (Peach?) ripened July 31, large yellow, shaded with red, 



freestone, fair quality. 

 Czar, ripened, July 31, large puri)le, fine quality. 



Lincoln, " Aug. 5, medium to large, purple, good quality. 



German Prune," Aug. 29, " " " freestone " " 

 Kingston, " Sept. 1.5, large rather acid, late. 



JAPANESE. 



Red June, ri[)ened, July 26, medium to large, fair quality. 



Abundance, " July 30, large, good quality. 



Georgeson, " July 30, medium to large, fair quality. 



Burbank, '' Aug. 14, large, firm, fair quality. 



Chebot, " Sept. 1, medium to large, good quality. 



Satsuma, " Sept. 10, large, valuable for canning. 



The Abundance ripened fruit prematurely on some of its branches. 



The Georgeson and Chebot were severely injured by the shot-hole 



fungus. Fertilizers used on the plum trees were : 



2 to 3 lbs. sulfate of potash, ^ . ,. ^ . ■, . 



, , ^ ,, -^4- e ^ f According to size and vigor 



1 to 2 lbs. nitrate of soda, Y f ^ . 



2 to 4 lbs. acid phosfate. ) 



