February, '21] felt: European corn borer 85 



any strain of corn sufficiently resistant to chinch-bug attack to with- 

 stand the onslaught of the nearly full-grown first brood bugs when they 

 leave the wheat fields at harvest time. The results thus far obtained 

 seem to prove that certain strains of corn show greater resistance to 

 chinch-bugs than others, and that where these strains are grown on 

 fertile soil in areas infested by chinch-bugs and protected from attack 

 b}' the first 'brood of bugs, moderate yields may be expected. 



President Wilmon Newell: How did these varieties compare in 

 maturity at the time of the chinch-bug attack? 



Mr. W. p. Flint: There was some difference in the different varie- 

 ties, but it was not very great. We tried to select those with similar 

 maturity. They were all varieties that mature in about 100 to 1 10 days. 



President Wilmon Newell: The next paper is by Mr. E. P. Felt, 

 on the "European Corn Borer in New York State." 



EUROPEAN CORN BORER IN NEW YORK STATE 



By E. P. Felt, Albany, N. Y. 



The known infested area in New York State as indicated by published 

 Federal quarantines, comprises 67 towns and cities located in 11 counties, 

 a total area of over 2200 square miles. 



The eastern infested area includes 1326.76 square miles according 

 to data kindly supplied by Mr. Worthley, is irregularly rectangular 

 in shape and centers approximately upon Schenectady. The federal 

 scouting of the present year has added 12 towns to this area, the exten- 

 sion rarely exceeding five miles in any one direction and since an area 

 of about two towns has been scouted outside the infested territor}^ the 

 limits of this infestation are fairly well defined and the spread must be 

 characterized as moderate, certainly not alarming. 



The western area covers 936 square miles, the extensions this year 

 north of Buffalo and west of Dunkirk being approximately 25 miles in 

 each direction and including 14 additional towns. It was not possible 

 to scout this area as thoroughly as was desirable in 1919 and conse- 

 quently a portion of this new area may have been due to infestations 

 not disclosed the preceding season. 



The following data are based upon field work conducted by Mr. D. B. 

 Young and Hall B. Carpenter under the writer's direction, the eastern 

 area being given the closest attention. 



Planting of sweet corn in the eastern area began as earl 3^ as May 14th 

 and some of the very early fields were up the 23d, some fields of field 



