30 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



last moth of the spring brood emerged July 27; it required at that 

 time of the season 45 days from the date of emergence of the moth 

 to time of maturity of the resulting larva. Thus the larvae of the 

 first brood must have ceased to appear b} T September 10. The first 

 moth of the first brood or summer moth emerged July 29 , at which 

 time the insect developed rapidly and mature larvae resulted in 33 



5 10 15 20 25 JO 5 10 15 zo 2* 30 5 10 15 20 25 30 5 10 /5 20 25 30 f 10 

 JULY AUGUST SEPTEMBER OCTOBER NOV. 



Fig. 10. — Curves made from band-record experiments in orchards at the lake shore near Douglas, at 

 Saugatuck, and at New Richmond, Mich., 1910. (Original.) 



days. Thus the first larvae of the second brood appeared August 31. 

 Similarly, the first-brood and second-brood larvae in the Lake Shore 

 and New Richmond experiments have been determined, with due 

 consideration given to the seasonal conditions of each locality. 



The results from three band experiments may be appreciated by 

 an examination of the curves in figure 10. A difference in the time 

 and rate of maturity of larvae will be noted in considering the height 

 of the curves representing the first brood. In the Lake Shore orchard 



