DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 

 Table V. — Life of spring brood of moths — Cage I. 



Moths emerged and put into 

 cage. 



Moths died. 



Average 

 life of 

 moths. 



Eggs laid (at night). 



Date. 



Number. 



Date. 



Number. 



! 



Date. 



Number. 



April 13 



1 

 2 

 1 

 2 

 4 

 1 

 1 

 3 

 15 



April 19 



l 

 l 



l | 



4 

 2 

 3 

 5 

 1 

 1 

 2 

 3 

 1 

 2 

 1 



•10.5 days. 



April 19. 



23 



April 15 



April 20 



April 24 



46 



April 16 



April 22 



May 2.. 



16 



April 17 



April 24 







April 18 



April 28 





April 19 



April 29 





April 20 



April 30 





April 21 



May 1 





April 23 



May 2 











Total 



30 



May 4 







May 5 







May 9 







May 10 







Escaped 



2 1 









1 







Table VI. — Life of spring brood of moths — Cage II. 



Moths emerged and put into 

 cage. 



Moths died. 



Average 

 life of 

 moths. 



Eggs laid (at night). 



Date. 



Number. 



Date. 



Number. 



Date. 



Number. 



April 25 



4 

 1 

 2 

 2 

 9 

 12 

 10 



May 2 



2 

 1 

 1 

 3 

 1 

 2 

 5 

 4 

 3 

 2 

 4 

 3 

 2 

 2 

 5 



•9.1 days. 





5 



April 28 





May 8 



16 



April 29 . 





May 11 



45 





May 6 







May 2 







May 3 



May 9 





May 4 



May 10 







May 11 





Total 



40 



May 12 







May 13 







May 14 













May 16 







May 17 

















THE FIRST GENERATION. 



FIRST-BROOD EGGS. 



Period of oviposition. — Eggs were cot laid in the rearing cages as 

 early as in the field, because of the lack of a sufficient number of the 

 earliest moths. Eggs collected in the field began to hatch April 27, 

 which, from the earliest observed periods of incubation, would indicate 

 that oviposition had commenced as early as April 7. Apple blossoms 

 had nearly all fallen by April 7. Eggs were abundant in the orchard 

 on April 27, 67 eggs being collected from the lower branches of 2 trees 

 in the space of half an hour. Of these, 6 were empty shells, 2 showed 

 the black head of the larva and hatched the same day, 36 showed the 

 red ring, and 23 were undeveloped. Eggs continued abundant in 

 the orchard during the early part of May. 



