12 



PAPERS ON THE COTTON BOLL WEEVIL, ETC. 

 Table III. — Percentage of weevils surviving hibernation infields. 



Year. 



Locality, 



1900-1 

 1902-3 

 1903-4 

 1900 

 1903 

 1902 

 1903 



1903-4' 



1903 



1903 

 1904 



1904 



1904' 



1.5 



(?) 



Vienna a ,.. 



do 



do 



Booth 



Hunter 



Wellborn .J g 



do i'«2.00g'+2. 



io 



Weather: December- 

 March. 



Rainfall. 



Win- t Nor- 

 ter. mal, 



h-f-5. 



+6. 



-6. 

 e-t-5. 

 /+9. 



do 



College Sta- 

 tion.? 



do.fc 



do.i.... 



do.w ... 



Rosprim.".. 



I 

 1.00 {7-2. 



-1. 



.75 

 1.00 



(?) 



-1. 

 -6. 



54 8. 

 86 8. 

 08 8. 

 7114. 

 60 7. 

 8413. 

 91113. 



45! 13. 



i 

 3812. 



I 

 88!l2. 

 12112. 



1212. 



6. 



-6.12|12. 



I 



Tempera- 

 ture. 



W^in- 

 ter. 



Nor- 

 mal. 



-t- 2.7 

 + .5 

 -fl4.1 



- 5.0 



- .8 

 -9.1 

 -11.6 



+ 2.1 



- 3.5 



- 3.5' 



+14. li 



-1-14.1 

 +14.1 



Date first ^^tk 

 emerged, -^te^; 



55.8 

 55.8 

 55.8 

 55.5 

 54.7 

 55.7 

 55.7 



55. 7| 



53.6 



53.6 

 53.6 



53.6! 



53.6' 



Mar. 10 

 Mar. 15 



May 8 



Apr. 17 



May 15 



Mar. 29 



Apr. 1 



Apr. 8 



May 17d. . . 

 May 22-31 - 



May 30 



May 22-29. 

 June 26- 



July 17. 

 May 20- 



Jiine 17. 

 June 18... 



do.... 



May 19- 



Junel4. 

 May 22- 



June 9. 

 June 7 



2,400 

 2,000 



6 

 397 



1 



26 



5 



2 

 49 



20 



Area 

 counted. 



10 acres 



J acre c 



1 acre 



2 acres 



140 stalks . . 



2 acres 



2, 125 stalks. 



l.eOOstalks. 



940 stalks . . 



40 stalks . . . 

 2,930stalks. 



1,840 stalks. 



> . 

 ^':3 





<y be 



31.0 



13.0 



4.0 



2.5 

 .04 



1.6 



5.0 

 1.66 



1.0 



10 1,000 stalks. 1.0 



rf30 

 13 



2.5 

 .08 



1.6 



5.0 

 1.66 



1.0 



a Obseryations by Louis Teltschick. 



b Record for Hallettsyille. 



c Three-fourths-acre trap roAvs. 



d Estimate of several fields. May 17. 



e Records of Houston, as far as given. 



/ Record for New Braunfels. 



g Records for Brenham. 



h August 17, 2 Aveevils per 100 stalks. 

 i In sorghum in 1902. 

 fc Cotton, 1902. a cro-'^sroad by barn. 

 I Cotton not destroyed in fall of 1903. 

 tn Cotton destroyed in fall of 1903. 

 n In corn in 1903. 



In the field we have never found the percentage surviving at the 

 college to approach this number, except in one instance. As shown 

 in Table III, in the spring of 1903 cotton was planted near the college 

 barn, where it had been grown the previous year and left standing. 

 The weevils had the most favorable conditions possible for hibernat- 

 ing around the barn. They appeared so numerously on the cotton in 

 the following spring that on June 18 there were 5 hibernated weevils 

 to every 100 stalks. More weevils were found in this cotton thruout 

 the year than in any other locality. If it be fair to assume that about 

 one weevil to a stalk occurred in this field at the time of hibernation 

 in the fall of 1902, then about 5 per cent survived. It is quite possi- 

 ble that there were more than this number in the fall, and the per- 

 centage surviving would therefore be somewhat less. Elsewhere, in 

 the neighborhood of the college, not over 2 per cent have ever been 

 found to survive the winter in the field, tho several fields within a 

 distance of 4 miles have been carefully observed. 



In the Brazos bottom, on Smith & Carson's plantation. Professor 

 Mally (report,^ p. 16) records picking 397 weevils from 2 acres May 

 22-29, 1902, or 2.5 weevils to 100 stalks, which would give not over 2.5 

 per cent surviving hibernation. In 1903 but 1 weevil was found to 

 2,125 stalks, or 0.04 to 100 stalks, which would give a percentage of 

 hibernation of not over 0.04 and probably 0.08, as there were 2 weevils 



''^Report on the Boll Weevil, Austin, Tex., August, 1902. 



I 



