IV DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



Page. 



Seasonal-history studies of 1911 32 



Source of rearing material 33 



Winter-killed larva? 33 



Spring brood of pupa? 34 



Time of pupation 34 



Length < >f pupal stage 35 



Relation of temperature to the duration of the pupal stage 35 



Spring. brood of moths 37 



Time of emergence of moths 37 



Egg deposition by individual moths 38 



Egg deposition in stock-jar experiments 40 



Period of egg deposition 41 



Length of life of moths 41 



The first generation 42 



First brood of eggs 42 



Length of incubation 42 



Effect of temperature upon time of incubation 44 



First brood of larva? 46 



Time of hatching 46 



Length of feeding period of transforming larvae 46 



Length of feeding period of wintering larvae 46 



Time of maturity of larvae 47 



Percentage of transforming and wintering larva? 47 



1 ,ar val life in the cocoon 47 



First brood of pupa? or summer pupa 1 18 



Time of pupation 48 



Length of pupal stage 49 



First brood of moths or summer mot lis 50 



Time of emergence 50 



Time of oviposition 51 



Length of life of male and female moths 52 



Length of life cycle of the first generation 53 



The second generation 55 



Second brood of eggs 55 



Time of incubation 55 



Effect of temperature upon the time of incubation 58 



Second brood of larva? 58 



Time of hatching 58 



Length of feeding period 60 



Time of maturity (iO 



Band records of 1911 60 



Summary of seasonal-history studies of 191 1 65 



Weather records for 1909, 1910, and 1911 66 



Comparative life-history studies for the seasons of 1909, 1910, and 1911 70 



Insect enemies 73 



Predaceous insects 73 



Parasitic insects 74 



Nematode worms 76 



Miscellaneous observations 76 



Number of larval instars and molts of the codling moth 76 



Cannibalism among larvae of the codling moth 83 



Codling moth Larvae remaining two seasons in the larval stage 83 



( lodling moth larvae feeding on apple foliage 84 



Summary 84 



