THE MONTHLY BULLETIN. 



CALIFORNIA STATE COMMISSION OF HORTICULTURE 



Vol. VI. 



June, 1917. 



No. 6 



WILD MUSTARD CONTROL. 



Bj O. W, Newman. 



An examinatii £ data Prom experiments carried on in many of 



the eastern state3 in the control of weeds in grain fields, brings oui the 

 interesting Eacl thai many noxious weeds, especially the wild mustards. 

 including Brassica campestris, Brassica arm usis and Brassiea nigra, can 



FlG. IK. — Willi mustard. llrassica tninpes- 

 tris L.. is our :>( tii.' most common grain 

 weeds in California. It is the earliest. nox- 

 ious weed to appear in the sprint; and as a 

 result covers the ground when the young 

 grain should l»- getting its strongest 

 growth. I Original. I 



he largely controlled l>y the use of chemical sprays. The agricultural 

 experiment stations in North Dakota, Wisconsin and other states have 

 de istrated this control method beyond a doubt lor their particular 



slates. 

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