HIBEKNATION AND DEVELOPMENT OF BOLL WEEVIL. 21 



time the cotton commences to square freely and frequent counts be 

 niade, the number will be found to decrease for a few days, and there 

 is then a sudden rise due to the maturing of the first brood early in 

 June, and it is practically impossible to determine in the field whether 

 any hibernated weevils subsequently emerge. However, in 1904, it is 

 certain that no weevils emerged later than June 29, for at that date 

 practically no weevils could be found in the field, tho the bulk of the 

 hibernating weevils appeared from June 5 to June 10. Consequently 

 this year (1904) certainly no weevils emerged later than 22 days after 

 the maximum number. 



It has previously been shown b}^ Professor Mally (1. c, p. 16) and 

 by Hunter and Hinds, and noted above, that the weevils emerge grad- 

 uall^y over a period of from 4 to 6 weeks, normally more nearl}^ the 

 latter time. This range covers practically the same length of time as 

 from planting to the formation of the first squares on the bulk of the 

 cotton in any given community. The gradual emergence from hiber- 

 nation is shown by the number of weevils to 100 stalks in Table HI 

 for 1904 at College Station. In 1903 Mr. Teltschick picked the wee- 

 vils from three-fourths of an acre of trap rows, planted March 13, on 

 which the first bloom appeared May 28, and secured weevils as follows: 



April, about 40 weevils. 

 May 4, 36 weevils picked in 1 hour's time. 

 May 11, 43 weevils picked in 1 hour's time. 

 May 18, 68 weevils picked in 2 hours' time. 

 May 25, 54 w^eevils picked in 4 hours' time. 



In 1904 Mr. Teltschick made observations especially to determine 

 this point. His notes are as follows: 



Two plats of one-fourth of an acre each were selected in that part of the field 

 which was farthest away from my own as also from any other cotton patch. The 

 two plats themselves were separated by 25 rows of corn and surrounded by sugar 

 cane on two sides and by timbered land on the other two. No cotton had been 

 grown on or near these plats in 3 years. Plat 1 was planted in King cotton March 

 4, was up to a good stand March 14, and chopped to a stand April 11. From plat 1 

 the weevils were picked as follows: 



April 1 , 14 w^eevils. May 2, 96 weevils. 



April 11, 27 weevils. May 12, 140 weevils. 



April 21, 26 weevils. May 23, 150 weevils." 



Plat 2 was planted in Shine cotton April 25 (7 weeks later than plat 1), was up to 

 a good stand April 30, and was chopped to a stand May 12 (one month later than 

 plat 1 ). On plat 1 the first squares appeared May 2 and on plat 2 May 28. All fallen 

 and flared squares were picked up on both plats at intervals of 8 days up to July 1. 

 From plat 2 there were picked, on May 12, 3 weevils; May 23, 35 weevils. 



These records show very clearly the gradual emergence of the wee- 

 vils from winter quarters. In 1903 the maximum number of weevils 



« Weevils were picked also during June, but these doubtless belonged to the first 

 summer brood. 



