102 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



Table XXXVII.— Emergence of first-brood moths during 1908. From band-collected 



material. 



Date. 



Number 

 of moths. 



Date. 



Number 

 of moths. 



Date. 



Number 

 of moths. 



Date. 



Number 

 of moths. 



July 28 

 July 31 

 Aug. 2 

 Aug. 3 

 Aug. 4 

 Aug. 6 



1 

 2 

 6 



20 

 17 



7 



Aug. 7 

 Aug. 11 

 Aug. 12 

 Aug. 14 

 Aug. 17 

 Aug. 18 



9 



29 1 



9 

 5 



19 i 

 20 

 | 



Aug. 19 

 Aug. 22 

 Aug. 24 

 Aug. 26 

 Aug. 28 

 Aug. 30 



3 



3 

 1 

 1 

 1 

 9 



Sept. 2 

 Sept. 5 

 Sept. 7 

 Sept. 9 



4 

 1 

 3 

 2 



172 



BAND RECORDS OF 1907 AND 1908. 



For the banding work in 1907 an unsp rayed orchard was kindly 

 placed at the disposal of the Bureau of Entomology, through the 

 courtesy of Mr. W. Towne, of North East, Pa. 



After the loose bark on the trunk and larger branches had been 

 scraped off, 16 trees were properly banded. The banded trees were 

 examined once a week from July 12 to November 5 for larvae and 

 pupae. The results of these observations are given in Table XXXVIII. 



Table XXXVIII. — Band records taken from 16 apple trees during 1907. 



No. 



of record. 



Date of 

 collecting. 



Number 

 of larvae 



and 

 pupae. 



Number 



of 



emerging 



moths. 



No. 



of record. 



Date of 



collecting. 



Number 

 of larvae 



and 

 pupae. 



Number 

 of 



emerging 

 moths. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 

 12 



July 12 



July 23 

 July 27 

 Aug. 1 

 Aug. 6 

 Aug. 11 

 Aug. 17 

 Aug. 21 

 Aug. 26 

 Aug. 31 

 Sept. 5 

 Sent. 11 







14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 



Sept. 21 

 Sept. 26 

 Oct. 1 

 Oct. 6 

 Oct. 11 

 Oct. 16 

 Oct. 21 

 Oct. 26 

 Oct. 31 

 Nov. 5 



85 

 41 

 25 

 17 

 9 

 6 

 10 

 8 

 9 

 8 











23 



25 



29 



51 



76 



127 



272 



157 



182 



176 



14 

 14 

 8 



1 































1,457 



37 



13 Sent. 16 i 121 













Because of the short and cool season of 1907, the great majority of 

 the larvae of the first brood wintered, which resulted further in a very 

 small second generation. It is evident from figure 26 that the second- 

 brood larvae constituted only a small fraction of the total band col- 

 lection. Since the two broods of larvae evidently always overlap, the 

 relative number for each brood can only be approximately estimated. 

 Judging by the first emergence of moths of the first brood and by 

 other rearing records of the year, the first larvae of the second brood 

 reached maturity about October 10. Judging by this the entire band 

 collection would consist of 96.5 per cent of first-brood larvae and 3.5 

 per cent of second-brood larvae. Considering, further, that out of the 

 1,400 larvae of the first brood only 37 individuals transformed, while 

 the rest wintered, it can be figured approximately that only 3 per 

 cent of the first-brood larvae transformed, while 97 per cent wintered. 



