124 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



larvae leave the fruit in the fall has no bearing upon the time of emer- 

 gence of the moths in the following spring; in fact, some of the larvae 

 which left the fruit the latest in the fall of 1909 emerged as moths the 

 earliest in the spring of 1910. The division line between broods 

 probably occurred about August 12 to 16, and by examining the 

 table of the emergence record of 1910 no difference can be seen 

 between the respective dates of emergence of the moths. 



Relative percentage of larvx wintering from band material and per- 

 centage emerging as first-brood moths the year the larvx were collected. — 

 An examination of Table XI shows that 65.3 per cent was the highest 

 number that emerged in 1909 for any single band collection and 6 

 per cent the lowest. No moths emerged in 1909 from band collections 

 later than August 31. Of the total number of pupae and larvae collected 

 from all the bands for the entire season only 28.31 per cent emerged 

 as first-brood moths for the year 1909. One curious fact of the per- 

 centages that emerged in 1909 from each band collection during that 

 year was the sudden rise in percentage to 39.6 for the lot collected 

 August 19, after the percentage column had begun to dwindle to smaller 

 proportions. It will be seen from a glance at the table that the moths 

 emerged from this collection from September 11 to 16 and this may be 

 explained by the very high mean temperature during this period. 

 Just why the high temperature influenced this one collection and 

 none of the earlier or later collections is difficult to explain, except 

 that this particular collection was the first important collection of 

 second-brood larvae. 



A very unfortunate thing happened during the winter of 1909-10, 

 in that the first three jars and also jar C-10 were nearly rilled with 

 water and consequently all of the overwintering larvae were drowned 

 before being noticed. This caused to a great extent the small total 

 percentage emerging in 1910, or 21.25 per cent, which might have 

 been 30 or 35 per cent. 



The total percentage emerging for both years 1909-10 from the 

 total amount of larvae and pupae collected was 49.56 per cent, the re- 

 mainder having died naturally or were in the four jars filled with water. 

 It will be noticed that the highest total percentage emerging for both 

 years from any separate band collection was 88.4 per cent and was 

 from the previously mentioned collection on August 19, 1909. 



