66 



BULLETIX 1235, U. S. DEPARTMENT OF AGRICULTURE. 



In 1920, five ca^es of moths were used and, as shown in Table 55, 

 the majority of the eggs, 54.18 per cent, were deposited between 

 6 p. m. and 9 p.m., and 88.47 per cent were deposited between 3 p. m. 

 and 9 p. m. 



Table 55. — Time of opposition by codling moths of the first brood, in 8-hour periods, 



Yakima, Wash., 1920. 





Date of opposition. 





S 



3 



2 



h 



5 



J3 





Aug. 9 



Aug. 10 



Aug. 11 



Aug. 12 



Aug. 13 



Aug. 14 



CO 



u 

 <a 



ft 



Hour of 





























observation. 



& 





P> 





tc 





bO 





bo 





So 







3 







9 







fcO 





fcO 





60 





60 









° S 











3 





3 





* 







* 



o 



H 





a 



•o^* 





































u 

 | 



2 

 O 

 ft 



£ 



u 



a 



a 



CD 



Pi 



a 



1 



2 

 s 



ft 



a 



3 



a 



a 

 3 



P. 



a 



09 



JO. 



a 



03 

 o 



p) 



a 



o 



a 



a 

 3 



& 



a 



So 



bo 



o 



"c3 



o 



bo 



a 



s- 



l 





i 



£ 



z 



53 



E- 



fc 



En 



& 



£ 



b 



CD 



% 



£ 



o 



Eh 



> 



o 



ft 



6a.m 







70 







64 







63 







68 







tf.9 







71 







67.50 



0.00 







 



80 





 2 



81 



93 





 



80 

 90 







6 



79 

 99, 





 12 



5/ 

 .9,5 



2 

 4 



82 



9', 



2 

 24 



80.00 

 90. 67 



021 

 2 54 



12 noon 



3p.m 



20 



HO 



8 



H 



3 



91 



4 



95 







.9.9 



2 



99 



37 



93. 00 



3.92 



6 p.m 



51 

 86 



82 



71 



101 

 132 



87 

 76 



57 



85 

 68 



23 



82 



87 



71 



35 



119 



85 

 8/ 



39 

 36 



86 



89, 



324 



512 



85. 33 

 7 A. 83 



34.29 



9p. m 



54. IS 



12mr 







157 



78 



12 



75 



3 



72 



1 



65 



19 



50 



11 





46 

 945 



73.67 



4.87 







Total 





255 



138 



116 





185 





94 















Total number of eggs on foliage 676 



Total number of eggs on cages 269 



Per cent of eggs on foliage 71. 53 



In 1921, this study was again made with first-brood moths, five 

 cages being used. As in 1920, the majority of the eggs, 54.68 per 

 cent, were deposited between 6 p. m. and 9 p. m., and 89.35 per cent 

 were deposited between 3 p. m. and 9 p. m. (See Table 56.) 



Table 56. — Time of oviposition by codling moths of the first brood, in 3-hour periods, 



Yakima, Wash., 1921. 





Date of oviposition. 



Total 

 eggs. 



A v er- 

 ai' i' 

 tem- 

 pera- 

 ture 



Per 



cent 



of eggs 



per 

 3-nour 

 period, 



Hour of observation. 



Aug. 2 



Aug. 3 Aug. 4 



Aug. 5 





Num- 

 ber of 



Tem- 

 pt-! a- 

 fcure. 



Num- 

 ber of 



Tem- 

 pera- 

 ture. 



Num- 

 ber of 



eggs. 



Tem- 

 pera- 

 ture. 



Num- 

 ber of 

 eggs. 



Tem- 

 pera- 

 ture. 



6 a. m 









 

 

 199 

 310 

 1 



86 

 88 



70 





 

 

 13 



2 



60 

 71 

 80 



77 

 65 

 61 





 



B 

 78 

 210 



!7! 







60 

 69 

 SO 

 82 

 80 

 67 







11 



3 



35 



11 



56 



70 

 82 



71 





 

 19 



511 



61.00 

 71.76 



80. .'■> 



- 

 61.00 



00 



Q i. 3D 



(X) 





1.29 







:; |>. in 



6.38 



»> p. in 



34.67 





54.68 







2.98 









Total 



510 









470 





365 





i. 171 













. 1 ; 



Total numbei 



52. 65 



