8 BULLETIN" 435, U. S. DEPARTMENT OF AGEICULTTJRE. 



OVIPOSITION OF THE MOTHS. 



As the motlis emerged from day to day they were transferred to 

 rearing jars containing apple twigs in leaf, the ends of which were 

 placed in small vials of water to maintain freshness. The eggs are 

 laid singly or in irregular groups, usually on the underside of the leaf, 

 but sometimes on the upper side, and are securely glued to the leaf; 

 in fact, they can not be removed without crushing. In the rearing 

 cages the eggs are often deposited indiscriminately upon the sides 

 and bottom of the jars. 



Table II. — Oviposition of moths of apple leaf-sewer, Winchester, Va., 1915. 



Numter of cage. 



Number 



of 

 moths. 



Date of— 



Days. 



Emer- 

 gence. 



First 

 oviposi- 

 tion. 



Last 

 oviposi- 

 tion. 



Before 

 oviposi- 

 tion. 



Of ovi- 

 position. 



From 

 emer- 

 gence to 

 last ovi- 

 position. 



1 



3 

 4 

 3 

 4 



June 1 

 June 6 

 June 7 

 Jxme 8 



June 2 

 June 7 

 June 9 

 ...do.... 



June 7 

 June 11 

 June 19 

 June 21 



1 

 1 

 2 



1 



6 



5 



11 



13 



7 



6 



13 



14 



2 



3 



4 





2 



1 



1.25 



13 



5 



8.75 



14 

 6 

 10 





























From Table II it will be seen that the moths begin to deposit eggs 

 in from 1 to 2 days after emergence, the average for 4 observations 

 being 1.25 days. The average period of oviposition lasted 8.75 days, 

 the longest period observed being 13 days and the shortest 5 days. 



While these observations show that the moths oviposit very shortly 

 after emerging, Johannsen, in 1909, states that in Maine moths appear 

 in April and deposit their eggs in June. 



Copulation has not been noted, but occurs very soon after emer- 

 gence, as indicated by the short period between emergence and 

 oviposition. 



No individual egg-laying records were obtained, but in confinement 

 the moths averaged about 65 eggs each. 



LENGTH OF LIFE OF MOTHS. 



The length of life of 11 adults is given in Table III. 

 Table III. — Length of life of moths of apple leaf-sewer, Winchester, Fc., 1915. 



Number of moths. 



Length 

 of life. 1 



Number of moths. 



Length 

 of life. 



1 



5 



8 

 10 

 12 

 14 ' 



1 



15 

 15 



17 

 18 



2 . . . . 



1 



1 



1 



1 



1 



2 



11 



Maximum . . 

 Minimum... 

 Average 



Total . 





114 







IS 



5 



10.3 



