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CALIFORNIA FRUITS: HOW TO GROW THEM 



ment of infectious gumming of the cherry, studied closely by Prof. 

 H. P. Barss, of the Oregon Agricultural College, is as follows : 



The disease starts out late in winter, enlarging old cankers and becom- 

 inc a source of new infection. It is caused by organisms which live over 

 winter in the discolored bark at the edges of the old cankers. The gumming 

 is simply incidental and is not always noticeable, neither does gumming 

 always indicate the disease. The only remedy is to cut all tha bark and wood 

 close to the disease, taking enough to be sure to get all the organisms newly 

 working in bark not yet discolored. Then wash with a 1 to 1000 solution of 

 corrosive sublimate prepared under direction of the druggist who sells the 

 tablets and apply pruning paint or white lead mixed with raw (not boiled) 

 linseed oil. Close watch through the spring and summer for new cankers or 

 blighted spurs and twigs will probably reveal some to be cut out. Always 



Twelve-year-old cherry trees with acute and wide angled crotches. 



dip cutting tools in the sublimate solution, which is deadly poison to bacteria 

 and human begins. The disease on twigs and branches is easily handled 

 without great loss by cutting them out. 



Gum in the crotch should be cleanly brushed out when softened 

 by the winter rains. If allowed to remain, it becomes sour and 

 offensive and may injure the tree. In places where two or three 

 limbs come out closely together a kind of cup is formed (as just 

 mentioned in the discussion of pruning), which will hold the gum 

 from one year's end to another, and in its soft state, leaves, sticks, 

 cherry pits, dust, and dirt will stock and hang and sometimes the 

 mass becomes very foul. By this collection also, a nest is made for 

 all manner of insects, bugs and worms. Another evil in letting the 

 gum stay on is, if the rain does not wash it off clean, it runs down 

 the trunk of the tree and makes the bark look bad, and if it is very 

 thick on the bark when it dries, it will contract and crack the bark 

 crosswise, and is very injurious to the tree. 



