22 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



Table XXII. — Length of life cycle of the first generation, as determined by rearing in 



1910 at Douglas, Mich. 



c3 



3 



•n 

 '> 

 '•3 



a 



o 



d 



Date of— 



Days — 



Egg dep- 

 osition. 



Hatch- 

 ing. 



Leaving 

 the fruit. 



Pupa- 

 tion. 



Emer- 

 gence. 



_o 



3 

 O 

 3 

 i— i 



Feeding of— 



a 

 3 . 



O o3 

 O > 



sa 







3 



$ 



3 



Pi 



6 





 •2 



O 



Eh 



3 ^ 



be 

 3 . 



■a & 



£ £ 



3 c3 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 



June 25 

 ...do 



July 2 

 ...do 



July 26 

 July 28 

 July 29 

 July 30 



...do 



July 31 

 Aug. 1 

 July 24 



...do 



July 26 

 July 27 



...do 



...do 



July 28 

 July 30 

 July 23 

 July 29 

 July 30 

 Aug. 1 

 Aug. 2 



...do 



Aug. 3 

 Aug. 4 

 Aug. 6. 



. .do... 



July 31 



Aug. 15 



7 

 7 

 7 

 7 

 7 

 7 

 7 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 7 

 7 

 7 

 7 

 7 

 7 

 7 

 7 

 7 

 7 

 7 

 7 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 

 6 



24 



"'"27" 



""28" 

 29 



""26" 



20 

 22 

 23 

 23 

 23 



"'27" 



27 

 "3T 



""25" 

 25 

 25 



"'24' 

 26 

 28 



""26" 

 ""28" 



""36" 



"24" 



26 



"23* 

 24 

 26 



""28" 

 29 



"""iji" 



17 

 20 



""26" 

 27 

 28 

 29 

 32 

 36 

 45 

 23 



"'29' 

 33 

 30 

 30 

 31 

 31 

 31 

 33 

 35 

 35 



5 



15 



51 



...do 



...do 



...do 



...do 



...do 



June 28 



...do 



...do.... 



...do 



...do 



...do 



...do../.. 



...do 



July 4 



...do 



...do 



Aug. 2 



Aug. 18 



4 



16 



54 



Aug. 8 

 Aug. 9 



Aug. 23 

 ...do 



9 

 9 



15 



14 



59 

 59 



July 29 



...do 



July 31 

 Aug: 2 



...do 



...do 



Aug. 13 



...do 



Aug. 16 

 Aug. 18 

 Aug. 20 

 Aug. 15 



5 

 5 

 5 

 6 

 6 

 6 



15 

 15 

 16 

 16 

 18 

 13 



46 

 46 

 49 

 51 

 53 

 48 



...do 



...do 



...do 



...do 



...do 



June 30 



...do 



do 



...do 



...do 



...do 



...do 



...do 



...do 



July 6 

 .do... 













July 27 



Aug. 12 



4 



16 



43 













...do 



...do 



...do 



...do 



...do 



...do 



...do 



July 1 

 do 



...do 



...do 



...do 



...do..... 



...do 



...do 



do 













Aug. 6 

 Aug. 12 



Aug. 20 

 Aug. 24 



4 

 10 



14 

 12 



51 



55 













Aug. 17 



Sept. 1 



11 



15 



63 



July 8 

 ...do 



July 25 

 July 28 

 Aug. 2 



...do 



...do 



Aug. 3 

 Aug. 4 

 Aug. 5 

 Aug. 6 

 Aug. 9 

 Aug. 13 

 Aug. 22 

 Aug. 3 

 Aug. 4 

 Aug. 6 

 Aug. 8 

 Aug. 9 

 Aug. 13 

 Aug. 12 



...do ... 























...do 



...do 



...do 



...do 



...do 



...do 



...do 



...do 



..do 



...do 



...do 



...do 



...do 



...do 



...do 



...do 



...do..... 

 ...do 



Aug. 4 

 ...do 



Aug. 9 



Aug. 18 

 Aug. 19 

 Aug. 23 



2 



2 

 7 



14 

 15 

 14 



48 

 49 

 53 





















































...do 



July 5 



...do 



...do 



...do 



...do 



...do 



July 7 



...do 



...do 



...do 



...do 



...do 



...do 



...do 



...do 



July 11 



...do 



...do 



...do 



...do 



...do 



July 13 



...do 



...do 



.do 























Aug. 12 

 Aug. 13 



...do 



...do 



Aug. 25 

 Aug. 26 

 Aug. 25 



8 



5 



4 



13 

 13 

 12 



51 

 52 

 51 



























Aug. 13 

 ...do 























...do.... 



...do 













...do 



...do 



...do 



Aug. 15 

 Aug. 17 

 ...do 







































Table XXIII. — Life cycle of the first generation; summary of Table XX LL. 





Incuba- 

 tion. 



Feeding of— 



In cocoon 

 as larva. 



Pupal 

 stage. 



Total 

 life cycle. 



Trans- 

 forming 

 larvae. 



Winter- 

 ing 

 larvae. 





Days. 

 6.37 

 7 

 6 



Days. 

 24.7 

 31 



17 



Days. 

 28.9 

 45 



Days. 

 6.0 

 11 

 2 



Days. 

 14.5 

 18 

 12 



Davs. 

 51.5 

 63 

 43 



Maximum 



Minimum 





The results of these experiments are given in Tables XXII and 

 XXIII. Although limited in number the results of these experiments 

 agree very closely with those of the previous experiments for the 

 separate stages, namely, the life-cycle experiments averaged 51.5 days, 



