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CALIFORNIA FRUITS: HOW TO GROW THEM 



be due to standing water or to lack of soil moisture, either of which 

 will destroy the root-hairs and bring the tree into distress. The 

 treatment is cutting back to sound wood and correcting the soil con- 

 ditions, either by irrigation or drainage, as one or the other may be 

 needed to advance vigorous growth in the tree. 



Gummosis. This is a convenient term to designate the gumming 

 which is seen on many kinds of trees. As has been said of die-back, 

 gumming may result from excess of water or of drouth in the soil. 



The peach blight twigs from sprayed and unsprayed trees. 



