24 



DECIDUOUS FKUIT INSECTS AND INSECTICIDES. 



The third brood shown in the 1907 band record (beginning Sep- 

 tember 2) is probably normal in bulk, though the curve should per- 

 haps rise more abruptly and stop earlier at the date of harvesting 

 the apples. There were taken October 7 from the bands 156 larvae, 

 an average of 52 per week since the last previous examination; mean- 

 while the fruit had been gathered, but the exact date could not be 

 ascertained. Picking the fruit would of course put an end to the 

 band record. 



It will be noticed in the curve (fig. 2) that the second brood is many 

 times larger than the first. But the third brood, instead of showing 

 a further increase, is scarcely larger than the first. This is not to be 

 taken as evidence of only a partial brood, but is due to the fact 

 that the fruit was harvested before the bulk of the third brood had 

 matured. 



Fig. 2.— Curve showing record of larvae and pupae of the codling moth taken from bands in 1907. 



The 1908 band record (Table XXXI and fig. 3) was influenced by 

 the very smal 1 size of the apple crop in that year. 



Table XXXI. — Band record of 1908, made from 18 trees in an orchard sprayed once after 



the calices had closed. 



[Record by Mr. S. W. Foster.] 



Date. 



June 6-15 

 June 22.. 

 June 29.. 

 July 6... 

 July 13.. 

 July 20.. 

 July 27.. 



Number 



of larvae 



and pupae 



taken 



from 



bands. 



Date. 



August 3 



August 10 



August 17 



August 24 



August 31 



September 7. 

 September 14 



Number 

 of larvae 

 and pu- 

 pae taken 

 from 

 bands. 



28 



23 



The trees from which this record was made had lost all their fruit 

 by September 7. 



