116 



Table XXXI. — Observations upon infestation, various localities, 1904. 



Locality (Texas). 



0) 



c3 



h 



a 



1' 



1 



S 



X 

 03 



o 



OS 



if 



Ill 





P 



m 

 < 



^ a 



Bo 



ll ■ 



< 



hi 

 ill 



< 



o 



Calvert 



12 



12 

 11 

 15 

 22 

 11 

 4 



2 



5 

 5 

 5 

 2 



13 

 4 



1904. 



Aug. 23 to 



Sept. 9. 



July 29 to 



Sept. 12. 

 July 28 to 



Sept. 12. 

 July 30 to 



Sept. 13. 

 Aug. 26 to 



Sept. 14. 

 June 18 to 



Sept. 24. 

 Julv22to 



Aug. 25. 



June 18 to 

 Sept. 24. 



2,754 



6,951 

 4,534 

 6,445 

 3,719 

 13, 227 

 5,005 



94.0 



72.4 

 80.4 

 64.4 

 91.3 

 54.2 

 65.0 



251 



376 

 407 

 317 

 274 

 170 

 167 



9.1 



5.7 

 9.0 

 5.0 

 7.4 

 1.3 

 3.3 



1,175 



2,506 

 3,261 

 4,618 

 2,456 

 544 

 230 



94.7 



71.9 

 64.9 

 64.9 

 92.8 

 66.9 

 46.4 



1.8 



.6 

 .6 



1.2 



.7 



6.1 



10.2 



4 2 



Corsieana: 



A 



27 



B 



19 



Mexla 



34 5 



Palestine 



8 2 



Victoria 



44.6 



Wharton 



25.3 







Total ... 



87 



6 



42, 635 



70.1 



1,962 



4.6 



14, 790 









Average 



80.0 



2.2 



27.7 













Under the conditions usually prevailing cotton will cease to make 

 when about two-thirds of the squares have become infested, since the 

 weevils have then become sufficiently numerous to attack nearly all 

 of the remaining clean squares before they have time to bloom and 

 form bolls. Even bolls which have set before this percentage of 

 infestation is reached are not entirely safe, as the smallest ones will 

 be more readily attacked by weevils, as they have greater difficulty 

 in finding uninfested squares. 



WEEVIL INJURY VERSUS SQUARE PRODUCTION. 



At the beginning of infestation the indications of the weevil's pres- 

 ence are inconspicuous. Even when considerably advanced most 

 farmers do not recognize the injury, and thus are led to believe that 

 the insect has not appeared. Among the most conspicuous indica- 

 tions of the weevil's presence may be mentioned the falling of infested 

 squares. As the squares remain on the plant after they become 

 infested fully as long as they lie upon the ground between the time 

 of their falling and the emergence of the weevil, it is plain that less 

 than half of the actually infested squares will ordinarily be observed. 

 Previous to falling, infested squares gradually turn yellow, and in 

 most cases flare somewhat; but flaring is by no means as closely related 

 to weevil injury as might be supposed. As the percentage of infesta- 

 tion increases, the great numbers of squares on the ground must attract 

 attention. (PI. XV, fig. 68.) Shedding of squares may take place for 

 other reasons than the attack of the weevil, but in fair weather^ when 



