VOLUME II 



No. 12 



THE MONTHLY BULLETIN 



Parsnip, badly Infested by the root- 

 knot nematode, Heterodera radicola. 

 (Photo by Leroy Childs.) 



OF 



STATE COMMISSION OF HORTICULTURE 



SACRAMENTO, CALIFORNIA 



DECEMBER, 1913 



Printed at State Printing Office, Friend Wm. Richardson, Superintendent. 



