36 a FATERIMENT STATION. [Jan. 



REPORT OF THE DEPARTIMEXT OF 

 ENTOMOLOGY. 



H. T. FERNALD AND A. I. BOURNE. 



Report of Project Work. 



The Onion Maggoi. — Studies on control of the onion maggot 

 have been seriously interfered with by the reduction of acreage 

 of onions raised, owing to lack of labor in the Experiment Sta- 

 tion. Only a small part of the acreage usually available could 

 be obtained for experimental work on this subject, and the 

 tests were less satisfactory for that reason. Such results as 

 were secured, however, were distinctly favorable, and if an 

 unrestricted opportunity to continue the work in 1921 can be 

 arranged, and the year proves to be a "maggot year," it is prob- 

 able that this project can be brought to an end. 



Importance of the Codling Moth. — Studies on the importance 

 and time of appearance of the codling moth have made satis- 

 factory progress. Considerable information has been added to 

 that already obtained, but the results thus far, it must be 

 acknowledged, are rather perplexing. The usual directions as 

 to treatment for this insect include spraying with arsenate of 

 lead three to four weeks after the calyx spray. This time is 

 rather too late for a fungicide spray, which should be applied 

 about two weeks after the calyx spray. If the codling moth 

 spray can be as successfully applied earlier, with the fungicide, 

 a distinct saving will be made. Tlie data thus far gathered are 

 insufficient to settle this point, and the entire project evidently 

 calls for further observations. 



Studies on Common Scales. — Observations on the dates of 

 appearance of the crawling young of our common scales have, 

 as stated last year, shown that the original idea of the experi- 

 ment could not be held to, but another basis for the work has 



