1554 



ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 



The following method of preventing 

 brown rot on the peach in the East and 

 Middle West has been recommended by 

 Scott: 1. Three or four weeks after the 

 petals fall spray with 8-8-50 self-boiled 

 lime-sulphur. 2. Three weeks later re- 

 peat, using the same mixture. 3. Spray 

 again about one month before the fruit 

 is expected to ripen with the same mix- 

 ture. 



On the prune, Bordeaux mixture, 4-4-50, 

 or commercial lime-sulphur, 1-30, would 

 doubtless be safe to use. The applica- 

 tions should be made as recommended 

 for peach. 



Scott has shown that the self-boiled 



lime-sulphur, 10-10-50, the commercial 



lime-sulphur, 1-40, and Bordeaux mixture, 



2-4-50, may be used safely on the cherry 



in the East. The writer would suggest 



that cherry growers who find it advisable 



to spray for this disease try any one of 



these mixtures. 



H. S. Jackson, 



Corvallis, Oregon. 



California Peach Blight and Fruit Spot 



Coryneum 'beijerincMi 

 One of the very important diseases of 

 the peach in Oregon is the so-called Cal- 

 ifornia peach blight or fruit spot. The 

 disease has also been referred to as the 

 winter blight. The disease has been 

 quite pervalent for some years in the 

 peach-growing sections of the Rogue 

 River valley, particularly in the vicinity 

 of Ashland. It has also been reported 

 from various sections of the Umpqua and 

 Willamette valleys and has recently been 

 reported as serious in the Milton-Pree- 

 water district of Umatilla county. It 

 seems to be rapidly spreading in the 

 state, but since no thorough survey work 

 has yet been attempted with special ref- 

 erence to this disease, the exact distribu- 

 tion is unknown. It has also been for 

 many years one of the most serious dis- 

 eases of the peach in the peach-growing 

 sections of California, where the greater 

 part of the investigations concerning its 

 cause and control have been conducted. 



Symptoms 



The most evident symptoms are the 

 dying of the buds on the fruiting wood, 



Fig. 1. Cankers of Peach Blight on First 

 Year Growth. 



accompanied later by a splitting of the 

 bark on the branches of the current 

 year's growth. The buds may die before 

 spring and fail to develop altogether, or 

 they may start and later die after the 

 leaves are well out and the young fruit 

 set. Under the latter conditions the 

 foliage and young fruit die and later 

 fall. Usually associated with the dying 

 of the buds and spots on the twigs is a 

 copious "gumming," which manifests it- 

 self in the exudation of masses of gel- 

 atinous sap from these spots and from 

 the dead buds. The exudation of gum is 

 most abundant in wet weather, and 



