VOLUME V 



No. 6 



THE MONTHLY BULLETIN 



Crown gall, natural infection In a root of Royal 

 Hybrid walnut two years after planting from seed 

 in a nursery where the soil was artificially inocu- 

 lated with minced galls. (Original.) 



OF 



STATE COMMISSION OF HORTICULTURE 



SACRAMENTO, CALIFORNIA 



JUNE, 1916 



