30 BULLETIN 78, U. S. DEPARTMENT OF AGRICULTURE. 



1899. Johnson, W. G. The stalk worm: Anew enemy to young tobacco. U. S. 



Dept. Agr.. Div. Ent.. Bui., n. s., no. 20. p. 99-102, 1899. 



An account of injury to tobacco by C. caliginosellus. States that tobacco growers in 

 southern Maryland reported injury for last fifteen years, or possibly longer. Recommends 

 system of crop rotation aimed at control. 



1900. Johnson, W. G. Xotes on insects of economic importance for 1900. U. S. 



Dept, Agr., Div. Ent,. Bui., n. s., no. 26. p. 80-84. 1900. 



Brief mention of Omnibus caliginosellus. Reports insect as destructive to tobacco on 

 sod lands, p. S3. 



1902. Sanderson. E. D. Insects injurious to staple crops. New York, 1902. 



"The corn-root webworm (.Crambus caliginosdlus Clem.)," p. 130-134. Account of 

 injury to corn and tobacco. Recommendations concerning control. 



1903. Chittenden, F. H. The principal injurious insects in 1902. U. 8. Dept. 



Agr. Yearbook for 1902. p. 726-733, 1903. 



Brief mention of Crambus caliginosellus. One of the most destructive insects to corn in 

 Delaware in 1902, p. 729. 



1907. McNess, G. T., Mathewson, E. H., and Anderson. B. G. The improvement 

 of fire-cured tobacco. Ya. Agr. Exp. Sta.. Bui. 166. p. 186-234, May, 1907. 

 Account of difficulty of securing a satisfactory stand of tobacco in experimental work: 

 description of injury to plants. 



1909. Mathewson. E. H. Intensive methods and systematic rotation of crops in 

 tobacco culture. U. S. Dept. Agr. Yearbook for 1908. p. 403-420. pi. 33-37, 

 1909. 



Mention of tobacco '•wireworaT' or • ' stafkworm ' ' and effect of crop rotation on control, 

 p. 411. 



1911. Runner. G. A. Report upon tobacco insect investigations. Ya. Polytech 

 Inst. Agr. Exp. Sta., Ann. Rpt. for 1909 and 1910, p. 40-43, 1911. 



Amount of economic importance of insect, food plants, feeding habits of larvae. Recom- 

 mendations concerning control, p. 41-42. 



1911. Morgan. A. C. Insect enemies of tobacco in the United States. U. S. Dept. 



Agr. Yearbook for 1910, p. 281-296. 

 Brief mention of tobacco Crambus, p. 291. 



1912. Hunter, W. D. Relation betveen rotation systems and insect injury in the 



South. U. S. Dept. Agr. Yearbook for 1911. p. 201-210, 1912. 

 Discussion of importance of systems of crop rotation in relation to control. 



O 



WASHIXGTOX : GOVERNMENT PRINTING OFFICE : 1914 



