100 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



TIME OF EMERGENCE OF MOTHS OF THE SPRING BROOD. 



The first moth observed in 1907 appeared in the cages June 17 and 

 the last July 10. The emergence period, as shown in figure 23, lasted 

 twenty-three days, reaching a maximum on June 24. These emer- 

 gence records are given in Table XXXV. 



Table XXXV. — Emergence of spring moths during 1907, from material collected in a 



cider bin. 



Date. 



Number 

 of moths. 



Date. 



Number 

 of moths. 



Date. 



Number 

 of moths. 



D t Number 

 mte - of moths. 



June 17 

 June 18 

 June 20 

 June 21 

 June 22 



1 

 4 

 2 

 3 

 6 



June 23 

 June 24 

 June 25 

 June 26 

 June 27 



14 

 27 

 14 

 15 

 3 



June 28 

 June 29 

 July 1 

 July 2 

 July 3 



10 

 6 

 1 

 6 

 2 



July 5 

 July 6 

 July 10 



4 

 4 

 2- 



124 



In the spring of 1908 moths commenced to appear in the cages by 

 May 30. The last moth of this brood emerged June 24. Unfortu- 

 nately no record as to the number of emerging moths was kept, and 

 their relative abundance can thus only be estimated. Judging by the 

 size of a number of larvae collected in an orchard June 10, it was evi- 

 dent that moths in the field must have appeared even earlier than 

 those emerging in the cages and, on considering the band records also, 

 it is probable that the emergence extended to the end of June. 



TIME OF EMERGENCE OF MOTHS OF THE FIRST BROOD. 



In 1907 the first moth emerged August 6, the maximum number 

 emerged August 13, while the last moth appeared September 5; the 

 emergence period was thus limited to thirty days. (See Table XXXVI 

 and fig. 24.) 



Table XXXVI. — Emergence of first-brood moths during 1907. 

 material of 1907 and reared specimens. 



From band-collected 



Date. 



Number 

 of moths. 



Date. 



Number 

 of moths. 



Date. 



Number 

 of moths. 



Date. 



Number 

 of moths. 



Aug. 6 

 Aug. 8 

 Aug. 9 

 Aug. 10 

 Aug. 12 

 Aug. 13 



1 

 2 

 1 

 5 

 5 

 18 



Aug. 15 

 Aug. 16 

 Aug. 17 

 Aug. 18 

 Aug. 19 

 Aug. 20 



1 

 5 

 5 

 4 

 2 

 5 



Aug. 21 

 Aug. 22 

 Aug. 23 

 Aug. 24 

 Aug. 25 

 Aug. 26 



5 



4 

 2 

 4 

 4 

 1 



Aug. 27 

 Aug. 30 

 Aug. 31 

 Sept. 5 



2 

 2 

 1 



1 



80 



During 1908 the emergence period was remarkably extended. In 

 the cages the first moth emerged July 28, and the last moth emerged 

 September 9, covering a period of forty-four days. In Table XXXVII 

 are given the dates of emergence of the first-brood moths from band- 

 collected material. (See also lag. 25.) 



