4 i4 



Journal of Agricultural Research 



Vol. XX, No. 6 



Table I.- 



-Rate of oviposition of Sitophilus oryza; extracts from oviposition records 

 at Orlando, Fla., June, IQIQ, to March, 1920 — Continued 



Female died Oct. 25, 1919. 



A Weev'! emerged Oct. 30. 1919. 

 i Weevil emerged Nov. 6. 1919. 

 ; Weevil died Nov. 26, 1919. 

 * Weevil emerged Nov. 30, 1919. 



1 Female died Dec. 30, 1919. 



m Weevil emerged Dec. 9, 1919. 

 « Weevil emerged Dec. 15, 1919. 

 o Female living, 

 p Female died Mar. 5, 1920. 

 q Female died Feb. 25, 1920. 



NUMBER OF EGGS LAID 



The largest number of eggs laid by a single weevil was 576. These 

 were laid during a period of 149 days. The weevil in question emerged 

 July 5, 1919, began laying eggs on July 12, and continued oviposition 

 until December 7, 191 9. Egg laying was apparently stopped by the 

 cold weather and the exhaustion of the weevil, and death occurred 

 December 30, 191 9. This oviposition record is in all probability longer 

 than the average, though it does not represent the maximum period, for 

 when winter intervenes, a period during which few eggs are laid, the 

 oviposition period may be considerably longer. 



