TiM"Ei/Y Hints for "Farmers. *n 



berry, and a number of other plants, both cultivated and wild. 



The disease may be readily recognized by the large knot- 

 like outgrowths which develop at the crown of the plant just be- 

 neath the soil, or, in older plants, on the roots and rootlets^ There 

 is no disease of deciduous fruit trees in irrigated regions that is as 





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Fig. 5. Five-year-old almond tree in a (Jlendale orchard, showing large galls al- 

 most completely surrounding the crown a few inches below the surface. 



widespread and that causes so much injury to the fruit industry 

 as the crown gall. Not only is it prevalent and rapidly increasing 

 in the irrigated regions of the southwestern United States, but it 

 is becoming one of the most menacing diseases which threaten 



