26 PAPERS ON THE COTTON BOLL WEEVIL, ETC. 



last on June 29. At Terrell, Tex. , the first brood commenced to emerge 

 on June 30 and the last of these was secured on July 12. 



Altho the hibernating weevils may continue to oviposit for some 

 time there seems to be but little overlapping in the appearance of the 

 first and second generations of weevils. There is a period from the 

 first to the middle of July thruout the greater part of the infested 

 area when but little damage is reported from the weevil and when but 

 few weevils are found. This is the period during which the second 

 brood is developing within the squares. About the middle of July 

 and during the next ten days the second brood of weevils appears and 

 is generally reported. In some instances the injury by the second 

 brood is serious, especially where large numbers have hibernated suc- 

 cessfully, and after the second brood appears practically all the squares 

 become punctured and no more cotton is made. This condition is 

 more common in southern Texas, but usually the injury by the second 

 brood is no more serious than that due to the first in late June, and in a 

 great many cases it is reported as being decidedly less. In general, 

 unless there be exceptional rains, the hot suns of July seem to check 

 the development and injury of the weevil. N 



The distinction between the second and third broods is not so marked. 

 The period of oviposition of the second brood doubtless being longer 

 than that of the first, the third brood commences to appear before the 

 last of the second brood has emerged. However, there is still a very 

 decided and notable increase in the number of weevils from the first 

 to the middle of August, depending upon the latitude and season. 

 This is generally noticed, and commonly reported as the third brood. 

 Usually with the emergence of this brood the weevils have become 

 sufficiently numerous to destroy all the squares as they form so that 

 no more blooms are seen. From this time the weevils attack the 

 maturing bolls much more frequently. After the appearance of the 

 third brood the different generations become so involved that it is 

 impossible to distinguish between them. 



At Terrell, Tex., five distinct broods were reared in 1904 up to 

 October 3, and these weevils then commenced to oviposit, so that 

 there would doubtless have been a maximum of six complete broods 

 in that locality. The records at Terrell are as follows: From the first 

 fallen squares injured by the hibernated brood, weevils emerged on 

 June 30, July 5, and July 12. On July 5 these weevils were placed 

 in a cage upon fresh squares, and the weevils developing from these 

 squares emerged on July 22, or in from 17 to 22 days. These were 

 placed on squares on July 23, and the weevils from them, or the third 

 brood, emerged August 17 to 20, or in 25 to 28 days. These weevils 

 were placed on squares August 20, and the weevils developing from 

 them, or the fourth brood, emerged September 8 and 9, or in 19 to 20 

 days. These were placed on squares September 10, and the weevils 



