44 



BULLETIN 932, U. S. DEPARTMENT OF AGRICULTURE. 



of each individual is definitely known, and this information aids in the 

 establishment of the approximate limits of the broods as they occur 

 in the field. 



Table XXVIII. — Band-record experiment. Codling moth larva? collected at the 

 Hamilton orchard, Grand Junction, Colo., 1915. 









Total 



Total 



Per cent of— 



Date 



of 



Col- 

 lec- 

 tion 

 No. 



Num- 

 ber of 



num- 

 ber of 



num- 

 ber of 















col- 



larvae 



moths 



moths 



Moths 



Moths 



Dead 

 individ- 

 uals. 



lection, 



col- 



emerg- 



emerg- 



emerg- 



emerg- 



1915. 





lected. 



ing, 



ing, 



ing, 



ing, 









1915. 



1916. 



1915. 



1916. 



June 28 



1 



138 



98 







71.01 







28.99 



July 1 



2 



127 



63 







49.60 







50.40 



5 



3 



116 



84 







72.41 







27.59 



8 



4 



124 



71 







57.25 







42.75 



11 



5 



130 



116 







89.23 







10.77 



14 



6 



185 



158 



2 



85.40 



1.08 



13.52 



17 



7 



191 



151 



1 



79.05 



5.23 



15.72 



20 



8 



252 



201 



3 



79. 76 



1.19 



19.05 



23 



9 



333 



238 



8 



71.47 



2.40 



26.13 



26 



10 



322 



245 



8 



76.08 



2.48 



21.44 



29 



11 



311 



225 



14 



72.34 



4.50 



23.16 



Aug. 1 



12 



235 



165 



13 



70.21 



5.53 



24.26 



4 



13 



176 



101 



25 



57.38 



14.20 



28.42 



7 



14 



176 



89 



53 



50.56 



30.11 



19.33 



10 



15 



127 



44 



31 



34.64 



24.40 



40.96 



13 



16 



123 



24 



37 



19.51 



30.08 



50.41 



16 



17 



131 



16 



51 



12.21 



38.93 



48.86 



19 



18 



101 



3 



54 



29.70 



53.46 



16.84 



22 



19 



109 







54 







49.54 



50.46 



25 



20 



108 







82 







75.92 



24.08 



28 



21 



98 







81 







82.65 



17. 35 



31 



22 



123 







76 







61.78 



38.22 



Sept. 3 



23 



129 







100 







77. 51 



22.49 



6 



24 



46 







26 







56.52 



43.48 



9 



25 



58 







30 







51. 72. 



48.28 



12 



26 



48 







22 







45.83 



54.17 



15 



27 



31 







16 







51.16 



48. 39 



18 



28 



14 







11 







78.57 



21.43 



21 



29 



23 







15 







65.21 



34.79 



24 



30 



22 







13 







59.09 



40.91 



27 



31 



27 







18 







66.66 



33.34 



30 



32 



11 







8 







72.72 



27.28 



Oct. 3 



33 



8 







4 







50.00 



50.00 



6 



34 



1 



















100.00 



9 



35 



6 







2 







33.33 



66.67 



12 



36 



12 







7 







58.33 



41.67 



15 



37 



2 







1 







50.00 



50.00 



IS 



38 



4 







2 







50.00 



50.00 



21 



Total lar 

 Total mol 



39 

 hs... 



5 







1 







20.00 



80.00 



4,183 









"'2*692' 



""869* 



50.01 



20.77 



29.22 







In figure 16 is presented the total combined number of moths emerg- 

 ing daily from the larvse collected in the Edwards and Hamilton 

 orchards during the season of 1915. As will be observed therein, the 

 moths began to emerge on July 9 and continued their emergence 

 until September 8, except on September 4 and 6. when no moths 

 issued. The maximum emergence, 152 moths, issued August 6. The 

 total number of moths emerging from this combined material in 

 1915 was 3,509 and in the spring of 1916, 1,845, or 45.37 per cent and 

 23.86 per cent, respectively, of the total number of larvae collected. 

 The rest of the larvae, 2380, or 30.77 per cent, died over winter or 

 through injury as a result of handling or from other undetermined 

 causes. 



