10 



PAPERS ON THE COTTON BOLL WEEVIL^ ETC. 



Immature stap'es and adult weevils are often found in early winter 

 in the unopened bolls hanging on the stalks thruout the infested 

 regions. We received live adult weevils in bolls from Hamilton, 

 Hamilton County, in December, 1903, and the}" have been observed 

 here and elsewhere, but we have no record of weevils having been 

 found alive in these situations in earh^ spring in central Texas, and 

 it is exceedingly doubtful if many of them would survive the winter 

 except in southern Texas. 



Table II. — Condition of immature stages of weevils after date of normal hibernation. 





Date. 



u 

 O 



a: 

 (D . 



05 



a 550 

 o98 

 a 50 



a 200 



a 100 



moo 



a 200 

 a 200 

 «200 

 n 200 



a 200 



fa200 

 \clOO 



«250 

 c250 

 a 500 

 c200 



Contain- 

 ing eggs. 



Containing larvte. 



^ o 



.5 l=i 



o 



O O 

 0) > 



Per cent of squarrs shOw- 

 weevil injury, but no 

 stage present. 





o 



3 



o 



o 



G 

 o 

 <x> 



o 

 o 



a 



C 

 a; 

 o 



P-, 



Per cent of total. 



Per cent less than 

 half grown. 



> a 



t-l 



> 



o 

 o 



Ph 



1 



in 



s 



0) 



Remarks. 



1 



1903. 

 Nov. 13 

 Nov. 12 

 Nov. 18 

 Nov. 20 



Nov. 22 



Nov. 28 



Nov. 26 



Nov. 30 



Dec. 4 



....do... 



....do... 

 Dec. 12 



Dec. 5 

 ....do... 



Dec. 4 

 ....do... 



9.15 

 25 



8 





25.5 

















40.5 





9 











Collected Nov. 7. 



s 





24 io i 14 

















Squares frozen Nov. 18. 

 Collected from plant Nov. 



15. 

 Collected from ground 



Nov. 22. 

 Collected from ground 



Nov. 8. 

 One-half collected from 



4 



10 













5 



12 

















6 



2 

 4 







100 

 100 



100 







9 

 4 



1 





7 









100 







p 







2 ! 100 







ground, one-half from 

 plant, Nov. 1. 

 OTit>-hfl.lf nollented from 



q 









1 







ground, one-half from 

 ' plant. Nov. 15. 

 ft 100 One-half collected from 



10 





















groiind, one-half from 

 plant, Nov. 18. ^ 

 ft 100 One-half collected from 



n 



















1 



ft 99 



ft 100 



ft 100 

 ft 87. 2 

 ft 95. 8 

 ft 96 



ground, one-half from 

 plant. Nov. 22. 

 One-half collected from 



T? 



















ground, one-half from 

 plant, Nov. 24. 

 One-half collected from 



IS 



















ground, one-half from 

 plant, Nov. 28. 



11 







12.8 

 42 

 4 



....1 





100 



'ioo" 



....!.... 





15 

 16 









57 1 43 

 ' 100 



100 



1.... 

 ! 























a Squares. 



ft Squares with no stage of weevil in them. Percentage injured unknown, but probaljly 40 per cent 

 as in lot 1. 

 c Bolls 



In November and December, 1903, Mr. Conradi made careful obser- 

 vations at College Station upon the condition of the immature stages 

 after the freeze of November 18. The results of these observations 

 are shown in Table II. It will be noticed that no pupie or adults 

 were found in over 3,600 squares and bolls examined, showing that 

 egg la34ng had temporarily ceased during some period before Novem- 

 ber 1. The most probable explanation of this remarkable absence of 



