10 



BULLETIN 189, U. S. DEPARTMENT OF AGRICULTURE. 



First-brood larvae were taken from the bands on June 5, and con- 

 tinued to appear in increasing numbers through the remainder of June 

 and most of July, the largest collection of the season occurring on 

 June 20. Since moths of the summer or first brood appeared in the 

 rearing cages on June 14 and in numbers by June 20, second-brood 

 larvae were probably entering the fruit in the field June 25-30, and, 

 allowing a normal feeding period, must have begun to appear under 

 the bands in the last of July to the first of August. A few larvae were 

 collected up to September 15, when the remaining fruit was picked 

 and the records discontinued. Figure 4 represents graphically the 

 numbers and time of collection of the larvae taken from the bands 

 during the season. In all, 542 larvae were taken from the bands, 223, 



105 

 SO 

 75 

 6O 

 4-S 

 30 

 15 



IlilW 



A SECOND BROOD 



TNtmn imin iimrnfrTT^iirUr^^ 



in O \t) O 

 x- (Vj CV| Cj 



JUNE 



JULY 



IQ Q U) O U) IQ O lo 

 AUGUST SEPT. 



FIG. 4. Diagram to illustrate band collections of larvae of the codling moth at Charlottesville, Va., in 



1913. 



or 41.14 per cent, of which perished in the rearing Cf^ges; 49.82 per 

 cent emerged as moths the same season, while 9.14 per cent spun up 

 and wintered. As has already been explained, the comparative 

 numbers of wintering and transforming larvae given in Table V must 

 not be considered usual. At Charlottesville hi an ordinary season a 

 large proportion of the first brood transforms, giving rise to a rela- 

 tively large second brood, and with a fair crop of fruit the larvae of 

 the second brood taken under the bands should far exceed the first 

 in numbers. 



SUMMARY FOR SEASON OP 1913. 



Spring-brood moths began emerging at Charlottesville on April 18. 

 First-brood larvae might be expected to have entered the fruit by 

 April 28-30, though not in any number until several days later. 



