THE CODLING MOTH ON PEARS IN CALIFORNIA. 



31 



interior counties and in the coast counties. The tables giving the 

 band records and emergence of moths for Walnut Creek and Suisun 

 sections show the maximum emergence of moths to be about three 

 weeks earlier than the maximum emergence at San Jose. Extended 

 field observations covering the seasons of 1909-10 confirm these 

 laboratory records. Many first-brood larvae were hatching and 

 entering fruit in early July in Santa Clara, Santa Cruz, and Monterey 

 and in Mendocino and Humboldt Counties along the coast, while all 

 this brood was in the 

 fruit by the 1st of 

 June in the adjoining 

 interior counties. 



Table XVII, giving 

 the band record, and 

 Table XVIII, giving 

 the record of the 

 emergence of moths, 

 show the conditions 

 for Santa Clara 

 County. The band 

 record was made in 

 an unsprayed apple 

 orchard. The data 

 given in the respective tables are shown diagrammatically in figures 

 14 and 15. 



Table XVII. — Band records from apple trees, San Jose, Cal., 1909. 



240 



220 



200 



180 



/GO 



140 



120 



100 



SO 



€0 



40 



20 



O 











































































































































































































































































































































































































































4 6/5 22 2S 



6 /3 20 27 



3 IO 17 24 3/ 



7 /4 2/ 

 ^£■^7-. 



Fig. 12. — Weekly emergence of moths from material collected under 

 bands on 11 apple trees at Walnut Creek, Cal., 1910. (Original.) 



Date of 

 collection. 



Number 

 of larvae 

 and pu- 

 pae col- 

 lected. 



Date of 

 collection. 



Number 

 of larvae 

 and pu- 

 pae col- 

 lected. 



Date of 

 collection. 



Number 

 of larvae 

 and pu- 

 pae col- 

 lected. 



Date of 

 collection. 



Number 

 of larvae 

 and pu- 

 pae col- 

 lected. 



June 21 



28 

 July 5 



12 



19 



26 



1.602 

 2,276 

 946 

 1,565 

 1,804 

 1,041 



Aug. 2 



9 



16 



23 



30 . 

 Sept. 6 



647 

 365 

 227 

 645 

 880 

 951 



Sept. 13 



20 



27 



Oct. 4 



11 



18 



634 

 649 

 271 

 135 

 92 

 18 



Oct. 25...... 



Nov. 1 



8 



Total . . 



1 

 8 

 3 



14,759 



Table XVIII. — Emergence of moths from banded apple trees, San Jose, Cal., 1909. 



Date of 

 emergence. 



Number 

 of moths. 



Date of 

 emergence. 



Number 

 of moths. 



Date of 

 emergence. 



Number 

 of moths. 



Date of 

 emergence. 



Number 

 of moths. 



July 12 



19 



26 



Aug. 2 



55 

 346 

 731 



777 



Aug. 9 



16 



23 



30 



884 

 694 

 441 

 165 



Sept. 6 



20 . 



40 



46 



133 



Sept. 27 



Total.. 



8 



4,320 



