XI 



been as troublesome this year as in preceding years. Our chief 

 experimental work during the summer has been against the cab- 

 bage maggot, and a report devoted to this pest will be made later. 

 As far as we have gone with the work, we feel that it can best 

 be controlled by the use of carbolic emulsion. Tarred paper disks 

 are not practical in this state. In the burrow of one maggot we 

 captured a Cynipid parasite, Pseudeucoela gillettei, Ashm. To the 

 best of our knowledge this parasite has not hitherto been reported 

 from ^Minnesota. A number of predaceous beetles were also cap- 

 tured, which were observed to feed upon the larvae and pupae of 

 this fly. This pest, which is such a serious menace to the market 

 garden industry, is figured and discussed in the body of this report. 

 On account of the loss sustained yearly through its work, it is well 

 worth serious study. 



"Fire Blight" on apple has been seriously injurious this year, 

 one party reporting that he had 2100 Wealthy trees affected. In- 

 quiries in this direction are referred to the Horticultural Depart- 

 ment of the Experiment Station. 



The entomologist is looking forward with pleasure to being 

 installed in the new building, now in process of construction in 

 the Experiment Station grounds. Sufficient room has been promis- 

 ed him therein to relieve the present over-crowded condition of 

 his department in the Drill Hall. The legislature has also grant- 

 ed $2,500 for an insectary, plans for which are now being made. 

 In this building the life histories and development of Minnesota 

 pests will be studied. Every well equipped experiment station has 

 a building of this kind, its importance being generally recognized. 



From Jan. i, 1905, to Nov. i, 1905, 1,326 letters have been 

 written by the entomologist, largely in reply to inquiries regarding 

 injurious insects, an average of 132 per month. From Jan. i, 1905, 

 to Sept. I, 1905, 930 circulars, bearing upon injurious insects, were 

 mailed. Lectures were delivered to farmers at Benson and Edina 

 Mills, two to the school teachers of St. Paul and one under the 

 auspices of the Minneapolis Y. W. C. A. Papers were also read 

 before the State Horticultural Society, at their spring and winter 

 meetings, before the St. Paul Market Gardeners' Association, before 

 the Association of Economic Entomologists at their annual meet- 

 ing, and various articles have been written to the press and other 

 publications. 



