MORTALITY IN EACH CLASS OF FORMS. 61 



Table XII. ( 'omparison of mortality results by class of forms and section of State. 



Class of fruit and section 

 of State. 



Total 

 num- 

 ber of 

 forms 

 exam- 

 ined. 



Total 

 num- 

 ber of 

 stages 

 found. 



Total number of 



stages destroyed. 



Mortality per- 

 centage. 



Total 



mortal- 



Rank 



of sec- 

 tion by 

 total 

 mor- 

 tality. 



Heat. 



Ants. 



Para- 

 sites. 



Heat. 



Ants. 



Para- 

 sites. 



ity 



three 



factors. 



Dried hanging bolls: 



Western Louisiana . .. 



Eastern Texas 



Southern Texas 



Central Texas 



Northern Texas 



Southwestern Texas. . 



2,955 



2,223 

 2,361 



4,900 



4, 004 



310 



1,163 



021 



92S 



1.358 



1,302 



1 



137 



29 

 49 

 144 



07 

 



252 

 74 

 109 

 234 

 232 

 1 



69 



40 

 27 

 113 

 07 

 



P. ct. 



11.8 

 4.7 



5.3 

 10.4 

 4.9 

 0.0 



p. ct. 



21.7 

 11.9 

 11.0 

 17.2 

 17.0 

 100.0 



/'. ct. 



(i.O 

 7.4 

 2.9 

 8.4 

 4.9 

 0.0 



1\ Ct. 



39.4 



24.0 

 20.0 

 28.8 



20.9 

 100.0 



2 

 5 

 

 3 

 4 

 1 





17,359 



5, 433 



420 



902 



322 



7.8 



10.6 



6.0 



30.4 





Dried hanging squares: 

 Western Louisiana. . . 



Eastern Texas 



Southern Texas 



Central Texas 



Northern Texas 



Southwestern Texas . . 



1,208 



800 



3,028 



1,370 



225 



307 



847 

 004 

 1,848 

 706 

 110 

 115 



175 

 102 

 322 

 180 



18 



7 



274 70 

 119 70 

 301 235 



128 | 154 

 19 1 9 

 42 2 



20.7' 

 17.0 

 17.3 

 25.5 

 10.4 

 6.1 



32.3 

 19.7 

 16.3 

 18.1 

 17.3 

 36.5 



8.3 

 11.3 

 12.7 

 21.8 



8.2 

 1.7 



I'd. 3 

 48.2 

 47.0 

 65.4 

 41.8 

 44.3 



2 

 3 

 4 



1 

 





7,004 



4.230 



804 



883 540 



19.0 



9.0 

 12.8 

 14.4 

 11.6 



8.0 



2.7 



20.9 



23.5 

 36.2 

 10.0 

 13.3 

 10.7 

 5.0 



12.8 



0.8 

 4.0 

 1.3 

 1.1 

 0.0 

 1.8 



52.6 





Fallen bolls: 



Western Louisiana . . . 



Eastern Texas 



Southern Texas 



Central Texas 



Northern Texas 



Southwestern Texas. . 



2, 000 

 5,570 

 8,280 

 4, 400 

 1,127 

 030 



22, 085 



599 

 1,294 

 1,315 

 796 

 177 

 437 



54 

 105 

 190 

 92 

 14 

 12 



141 

 452 

 211 

 106 

 19 

 22 



5 

 5 

 17 

 " 9 

 1 

 8 



33.4 

 50.0 

 31.8 

 26.0 

 19.2 

 9.6 



2 

 1 

 3 

 4 

 5 

 





4, 018 



527 



951 45 



11.4 



21.0 



1.0 



33.4 





Fallen squares : 



Western Louisiana. . . 



Eastern Texas 



Southern Texas 



Central Texas 



Northern Texas 



Southwestern Texas. . 



4, 170 



4,340 



23,411 



5,970 



1,210 



795 



39, 908 



2,508 

 2,820 

 15, 583 

 2,939 

 573 

 287 



160 

 296 

 5,009 

 640 

 147 

 49 



859 

 820 

 5,280 

 669 

 100 

 52 



12 



34 



532 



107 



9 



24 



6.4 

 10.5 

 31.2 

 21.7 

 25.2 

 17.0 



34.2 

 39.1 

 36.0 

 22.7 

 18.2 

 18.1 



0.4 

 1.2 

 3.0 

 5.7 

 1.5 

 8.5 



43.0 

 40.8 

 70.7 

 50.0 

 44.9 

 43.0 



5 

 

 1 

 2 

 3 

 4 





24,710 6,301 



7,786 778 



25.5 



32.8 3.3 



60.8 





In Table XII one of the most striking points is the rather uniformly 

 high percentage of parasitism in each section found in dried hanging 

 bolls and squares. By far the highest percentage of parasitism is the 

 21.8 per cent shown in dried squares in central Texas. Western 

 Texas leads in the percentage of parasitism in fallen squares, but when 

 the comparatively small number (287) of weevil stages found is con- 

 sidered, it would appear that 8.5 per cent may be largely in excess of 

 the percentage which would have been found in so extensive a series 

 of observations as was made in central or southern Texas. A similar 

 exception should be noted for the 100 per cent of mortality from ant 

 work in dried hanging bolls in western Texas where only a single 

 weevil stage was found. In dried hanging squares the mortality 

 from heat, as a general rule, very nearly equals that from ant attack, 

 while in other classes of forms ants destroyed many more stages of the 

 weevil than did heal and parasites together. 



In regard to ant work, it is evident that the high percentage shown 

 among fallen squares in each of the six sections examined is very 

 important. This is especially so because of the fact that t hese per- 

 centages apply to the largest series of examinations made, t be number 



