148 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 10 



north to south at Marysvi le, Manhattan, Marion, Peabody, Newton, 

 Sedgwick, WeUington, and Caldwell (Fig. 5) The individual stations 

 of the western series are located from north to south at Norton, Smith 

 Center, Osborne, Hays, Wilson, Pratt, Sawyer, Isabel, and Medicine 

 Lodge. Each sowing consisted of seeding a series of plots at weekly 

 intervals for six or seven weeks, beginning the second week in Septem- 

 ber. The stations have been secured and managed cooperatively by 

 the departments of Agronomy and Entomology of the Kansas Experi- 

 ment Station. Representatives of the United States Bureau of Ento- 

 mology have visited most of the stations each year, taking such data 

 as they desired. In all cases, the ground was prepared, the seed selected 

 and planted, and the crop harvested under the directions of the Depart- 

 ment of Agronomy. 



In summarizing the data of the experimental wheat sowings, the 

 following conclusions may be had: 



(1) Inasmuch as the best time to seed wheat to secure maximum 

 yield varies with different sections of the state, with different seasons, 

 and with other conditions, the proper time of seeding must be deter- 

 mined for each locality by experimental sowing extending over a 

 period of years. 



(2) In Northeast Kansas (Table I), the best yield in one year was 

 obtained from seeding September 23 and in the four other years from 

 seeding September 29 to October 11. The experiments show a very 

 clear and definite decrease in the infestation of Hessian fly with late 

 seeding. In one season (1914), about 50 per cent of the wheat sowed 

 before September 20 was infested, while none sowed after the first 

 week in October had any flies. 



(3) At Manhattan (Table II), in practically all seasons, the best 

 yields were obtained from seeding during either the fourth week in 

 September or the first week in October. Even in several of the years 

 when very little Hessian fly was present, there was no advantage from 

 early seeding. This is especially true if the ground is well prepared. 



(4) In East Central Kansas (Table III), the best yields have been 

 obtained with seeding between September 29 and October 20. In 

 the years of 1914-15 and 1915-16, the wheat sowed early was practi- 

 cally a total loss because of fly. 



(5) In Southeast Kansas (Table IV), the sowings seem to favor 

 rather early seeding, that is, from September 15 to September 23, as 

 shown by the results obtained in 1913 and 1914. However, the 

 Hessian fly caused practically no damage in these two seasons. In the 

 seasons of 1914-15 and 1915-16, all plots sowed before October 1 were 

 practically destroyed by the fly, and the late sown wheat produced 

 very small yields because the fly which infested the early plots mi- 



