44 



BULLETIN 1235, U. S. DEPARTMENT OF AGRICULTURE. 



LARV.E OP THE FIRST BROOD. 



Time of hatching. — The time of hatching of larvae of the first brood 

 was quite regular with the exception of June 17 and 18. Mean 

 temperatures below 60° F. on June 14 and 15 so delayed the de- 

 velopment of the eggs that no hatching occurred on June 17 and 18. 

 The first larvae hatched on June 2, and the last on July 10, with a 



/ 6 // /6 2/ 26 / 6 // 



Fig. 26.— Hatching of larvae of the first brood of the codling moth at Yakima, Wash., 1921. 



maximum of 755 on June 8. (See fig. 28.) Larvae of the first brood 

 were thus hatching over a period of 39 days. 



Length of the feeding period. — In Table 37 the length of the feeding 

 period of 722 first-brood larvae is tabulated. These data include both 

 transforming and nontransforming larvae. 



