THE CODLING MOTH IN MICHIGAN. 



BAND-RECORD EXPERIMENTS IN 1909. 



In the band-record experiments of 1909, 30 apple trees were used, 

 of which 15 trees were located in the yard of the laboratory and 16 

 trees in two near-by orchards. Fall and winter apples, such as Rhode 

 Island Greening, Baldwin, Golden Russet, Northern Spy, Wealthy, 

 etc., were used. With these late varieties of apple a thorough test 

 was made of the relative abundance of first and second brood larva?. 

 The results of these experiments are recorded in Tables III and IV 

 and by curves in figure 3. 



Fig. 3. — Curves showing maturity of larvae of first and second broods; band-record curve, of 1909, at 



Douglas, Mich. (Original.) 



Table III. — Band-record experiments in 1909 at Douglas, Mich., by W. Postiff; com- 

 pleted in 1910 by A. G. Hammar. 



No. of 

 record. 



Date of col- 

 lecting. 



Number 

 of larvse 



and 

 pupa?. 



Number 



of moths 



emerged, 



1909. 



Number 

 of para- 

 sites, 

 1909. 



Number 



of moths 



emerged, 



1910. 



Number 

 of para- 

 sites, 

 1910. 



Injured 

 and win- 

 ter-killed. 



1 

 2 

 3 

 4 

 5 

 6 



8 

 9 



10 

 11 

 12 

 13 

 11 

 15 

 16 

 17 

 IS 

 19 



July 12 

 July 19 

 July 26 

 Aug. 2 

 Aug. 9 

 Aug. 16 

 Aug. 23 

 Aug. 30 

 Sept. 6 

 Sept. 13 

 Sept, 20 

 Sept, 27 

 Oct, 4 

 Oct. 11 

 Oct. 18 

 Oct. 25 

 Nov. 1 

 Nov. 8 

 Nov. 15 



Total.... 







62 

 66 

 87 

 81 

 80 

 85 

 138 

 62 

 124 

 174 

 213 

 124 

 94 



6 



49 

 49 

 41 

 30 

 17 

 1 

 1 











4 



6 

 5 

 2 







9 

 11 

 32 

 35 

 23 

 15 

 23 

 14 

 35 

 40 

 50 

 20 

 36 







7 

 13 

 36 

 61 

 110 

 47 

 88 

 119 

 137 

 92 

 55 



2 



1 



4 



8 



4 



1 



1 



15 



26 



12 



3 













































51 

 20 



8 







36 

 15 

 5 



2 

 1 



13 



4 

 3 















1,475 



194 



17 



821 



80 



363 



