32 



HIBERNATION OF THE COTTON BOLL WEEVIL. 



sion of the significance of ginneries and oil mills in the distribution 

 of weevils and of the methods recommended for controlling them 

 which may be found in Farmers' Bulletin No. 209 of the Department 

 of Agriculture, "Controlling the Cotton Boll Weevil in Cotton Seed 

 and at Ginneries." Numerous observations have shown that weevils 

 have been taken into new localities through the agency of shipments 

 of cotton seed and cotton-seed hulls from ginneries and oil mills 

 handling infested stock. Definite observations have been made 

 showing that living weevils may occur in cotton seed at planting 

 time. While it is probable that few would survive in a large mass 

 of seed it is certain that some might do so and be distributed in 

 the planting of the seed. 



Table XI. — Experiments of 1904 to 1906 to test hibernation in cotton seed. 



Locality. 



Terrell, Tex 



1904. 

 Nov. 13 



Do 



Nov. 30 



Do 







Nov. 14 



Calverl . Tex 



Nov. 15 



Do 



Nov. .30 



Do 



Dee. 15 



Victoria, Tex 



Nov. 10 



Do 



Nov. 17 



Do... 



Nov. 25 



Do... 



Dec. 1 



Do 



Dec. 8 



Do... 



Dec. 15 



Total . . 





Dallas, Tex , 



1905. 

 Nov. 1 



Do 



Nov. 18 



Do... 



Dec. 4 



Do 



Dec. 15 



Total 







Nov. 7 



Do 



. .do 



Do... ...'... 



Nov. 13 



Do 



Nov. 30 



Do... 



Dec. 11 



Total 





When 

 put in 

 hiberna- 

 tion. 



Weevils 

 put in 



hiberna- 

 tion. 



200 

 200 

 250 

 150 

 200 

 200 

 200 

 200 

 200 

 200 

 200 

 200 

 200 



When 

 exam- 

 ined. 



1905. 

 Apr. 20 

 Apr. 21 

 Apr. 22 

 Apr. 19 

 Apr. 7 

 Apr. 8 

 ..do.... 

 Apr. 3 



..do 



Apr. 1 

 Mar. 31 

 .Mar. 29 

 Mar. 28 



2,600 



1906. 

 100 Apr. 2S 

 200 I Apr. 30 

 200 Mav 3 

 900 Mav 4 



1,400 



100 | Apr. 

 100 Apr. 

 100 Apr. 



..do. 



Apr. 



Weevils 

 found 

 alive. 



Weevils 

 found 

 dead. 



154 

 139 

 170 

 L27 



152 



17ti 

 142 

 130 

 144 

 150 

 115 

 149 

 L23 



100 

 100 



500 



ao 



1,871 







92 







160 







181 







-J 







1,295 







93 







93 







"7 







100 







96 



179 



a On January 27 47 (load and is living weevils were removed, and on March 4 4 dead and 1 living weevils 

 were removed! 



While the number and percentage of weevils surviving in these 

 experiments is very small indeed, the fact that some do survive is the 

 special point having significance. The occasional occurrence up to 

 planting time of living weevils among seed from infested localities 

 is alone sufficient justification for every quarantine restriction which 

 has been placed upon cotton seed and other cotton products by 

 uninfested territory. 



The Mexican entomologist Prof. L. de la Barreda, under the direc- 

 tion of Prof. A. L. Herrera, of the Comision de Parasitologia Agricola, 



