84 STATE BOARD OF AGRICULTURE. 



small and the season bad. Fertilizer tests are continued in 1903 on 

 fields away from the College farm for the reasons already stated. 



VII. The work on the plots set aside in 1895 for rotation and fertilizer 

 experiments is still kept up although according to the original plan no 

 results for publication may be expected until 1905 when the series will 

 be completed. 



I am glad of an opportunity to express my appreciation and that of the 

 council for the generous support accorded the Station by the President 

 of the College, by the State Board of Agriculture and by other depart- 

 ments of the College. I am especially glad to report that the Department 

 of Practical Agriculture has shown its kindly attitude by generously 

 responding at every opportunity to aid the Station work. Professor 

 Jeffrey has undertaken a study of the effects of the application of barn- 

 yard manures on the temperatures, the soluble salts and the life of the 

 soil and is aided by the Bacteriological Department in the work. He is 

 using several series of plots and important results may be expected. 



I refer again to the several reports hereto attached and made part of 

 this report and to the bulletins, copies of which are also attached and 

 which are to be printed as part of this report. 



Respectfully submitted, 



C. D. SMITH, 



Director, 

 Agricultural College, Mich., 

 June 30, 1903. 



ANNUAL REPORT OF THE DEPARTMENT OF ENTOMOLOGY OF 



THE EXPERIMENT STATION. 



Professor C. D. Smith, Director: 



Following is a brief report of the work done by the Department of 

 Entomology during the year ending June 30, 1903. 



Two bulletins have been issued during the season by this office. Spe- 

 cial Bulletin No. 17, and a brief resume of the same, No. 204. The corres- 

 pondence has continued to be quite an item in the routine work. One 

 trij), in company with Professor Wheeler, was made to Detroit to investi- 

 gate the cause of the death of hickories at Belle Isle. Recommendations 

 were made for the restriction of the trouble, 



A study of the mosquitio problem was commenced and experiments 

 for the eradication of the insects were made on quite an extended scale. 

 In this work, the writer was allowed one-third of the time of Mr. Bronson 

 Barlow, whose efficient field work made the experiment possible. The 

 large amount of standing water and the exceptionally wet season, made 

 it impossible to get rid of the mosquitos on the campus, although the 

 petroleum oil acted perfectly where applied, killing the insects in the 

 adolescent stages very readily. It was deemed advisable to wait one year 

 before repeating the work in order to take advantage of drainage then con- 

 templated. This spring, the woods behind number seven, or in other 



