30 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



Table XIV. — Band records from 11 apple trees, Walnut Creek, Cal., 1910. 



Date of 

 collection. 



Number 



of larvae 



and pupae 



collected. 



Date of 

 collection. 



Number 



of larvae 



and pupae 



collected. 



Date of 

 collection. 



Number 



of larvae 



and pupae 



collected. 



Date of 

 collection. 



Number 



of larvae 



and pupae 



collected. 



June 1 



/ 



252 

 200 

 394 

 185 



June 28 



July 5 



12 



19 



196 



105 



125 



71 



July 26. 



Aug. 2 



9 



16 



80 

 93 



120 



82 



Aug. 23 



. Total.. 



88 



14 



21 



1,991 



It will be seen (fig. 10) that the maximum number of larvae and pupae 



was collected on June 

 14, 1910, as against 

 June 26, 1909 (figs. 7 

 and 8), showing that 

 the greatest number 

 of larvae and pupae 

 was present nearly 

 two weeks earlier in 

 1910 than in 1909. 



Tables XV and 

 XVI show emergence 

 of moths from ma- 

 terial collected un- 

 der bands at Walnut 

 Creek and Suisun in 

 the summer of 1910. 

 Both tables are illustrated diagrarnmatically in figures 12 and 13. 



Table XV. — Weekly record of emergence of moths from material collected under bands 



on 11 apple trees, Walnut Creek, Cal., 1910. 



ZOO 

 90 



do 



70 



eo 



50 

 40 

 30 

 20 

 10 

 



Fig. 11.- 







































J 



— 1 



























/ 





, 

























r 





\ 









/ 



\ 











^ 



r 







\ 









/ 



\ 



















\ 



■ 



/ 



\ 



1 





\ 





















r 



\ 



/ 





\ 























\ 



f 





































































3 



1 10 17 24 

 /Ufis/E' 



/ 6 /S 22 29 , 



r /2 /a 



-Band records from 15 Bartlett pear trees at Suisun, Cal., 1910. 

 (Original.) 



Date of 

 emergence. 



Number 

 of moths 

 emerged. 



Date of 

 emergence. 



Number 

 of moths 

 emerged. 



Date of 

 emergence. 



Number 

 of moths 

 emerged. 



Date of 

 emergence. 



Number 

 of moths 

 emerged. 



June 22 



29 



Julv 6 



13 



3 



175 

 133 

 228 



July 20 



27 



Aug, 3 



65 

 84 

 30 



Aug. 10 



17 



24 



36 

 36 

 76 



Aug. 31 



Sept. 7 



14 



50 



15 



4 



Table XVI. — Weekly record of emergence of moths from material collected under bands on 



15 Bartlett pear trees, Suisun, Cal., 1910. 



Date of 

 emergence. 



Number 

 of moths 

 emerged. 



Date of 

 emergence. 



Number 

 of moths 

 emerged. 



Date of 

 emergence. 



Number 

 of moths 

 emerged. 



Date of 

 emergence. 



Number 

 of moths 

 emerged. 



26 



Julv 3 



1 



13 

 25 



July 10 



17 



24 



74 

 26 



18 



July 31...... 



Aug. 7 



14 



7 

 9 

 6 



Aug. 21 



28 



Sept. 4 



14 

 2 

 2 



There is a noticeable difference in the dates of development of the 

 first-brood larvae and the emergence of moths from this brood in the 



