20 INSECT ENEMIES OF THE BOLL WEEVIL. 



Table VI. — Monthly rate of mortality of the boll iveeril in infested forv^s of all classes 



Month. 



1906. 



June 



July 



August 



September 



October 



Totals and averages for 1906 



1907. 



June 



July 



August 



November 



Totals and averages for 1907 



1908. 



February 



March 



May 



June 



July 



August 



September 



October 



November 



Totals and averages for 1908 



1909. 



January 



February 



March 



July 



August 



September 



November 



December 



Totals and averages for 1909 



Forms 

 exam- 

 ined. 



4,621 

 11,120 

 55, 686 

 23, 175 



6,042 



100, 644 



2,274 



6.658 



12.898 



150 



21,980 



12,451 

 1,.329 

 100 

 10,0.35 

 16. 974 

 5,177 

 3 2. 7ns 

 11,. 302 

 2,248 



72, 234 



5,687 

 1,146 

 1,261 

 8,307 

 7,162 

 1,495 

 136 

 2,663 



27. 857 



Stages 

 found. 



3,831 

 5,111 

 19, 173 

 9,832 

 2,126 



40,073 



1,354 

 4.166 



7.792 

 93 



13,405 



515 



22 



56 



5,. 523 



7,764 



2,441 



6,415 



6,157 



653 



29,546 



1,285 

 150 

 137 

 4.717 

 3,764 

 860 

 52 



Percentage of stages killed by- 



All 



causes. 



73.80 

 61.67 

 54.64 

 50. 40 

 44.12 



55.81 



48.67 

 36.55 

 64.19 

 97.70 



54.27 



92.81 

 100. 00 

 10.70 

 43.81 

 45.63 

 61.53 

 42.29 

 33.92 

 50.53 



44.34 



45.52 

 58.00 

 43.06 

 45.36 

 37.32 

 21.25 

 100. 00 

 52. 32 



41.73 



Climate. 



46.90 

 34. 29 

 21.19 

 20.80 

 19.56 



25.15 



27.03 

 20.11 

 33.39 

 96.70 



29.06 



Preda- 

 tors. 



23.80 

 21. 83 

 29.32 

 24.14 

 19.75 



26. 31 



14.99 



10.77 



20.67 







16.88 



82.33 

 95.50 

 7.20 

 15.78 

 20.99 

 29.79 

 16.66 

 15.57 

 .35.52 



21.21 



.36. 42 

 16.66 

 21.89 

 28.70 

 20.64 

 9.30 

 32.00 

 38.37 



25.84 





 

 

 15.78 

 14.73 

 16.87 

 17.06 

 5.73 

 3.06 



13.12 



4.90 

 40.00 

 20.43 

 11.19 

 13. 33 



3.02 

 



2.03 



10. 56 



Para- 

 sites. 



3.10 

 5.53 

 3.61 

 5.43 

 4.79 



4.31 



6.64 

 5.66 

 10.12 

 1.00 



8.32 



10.48 

 4.50 

 3.50 

 6.24 

 9.90 



14.91 

 8.55 



12. 61 



14.70 



10.00 



4.20 



1.33 



.72 



5.25 



3.34 



8.95 



68.00 



11.91 



5. .32 



All 

 insects. 



26.90 

 27.36 

 32.93 

 29.57 

 24.54 



30.62 



21.63 



16.43 



30.79 



1.00 



25.20 



10.48 

 4.50 

 3. .50 

 22.02 

 24.63 

 31.78 

 25.61 

 18. .34 

 17.76 



23.12 



9.10 

 41.33 

 21.15 

 16.34 

 16.67 

 11.97 

 68.00 

 13.94 



15.88 



4. A GEOGRAPHIC STUDY OF THE STATISTICS OF INSECT CONTROL. 



A study of these same statistics, when arranged to show the insect 

 control by States, has given much interesting hght upon the subject 

 of the control of the weevil. 



In fallen squares we find an average for total insect control of 26.8 

 per cent in Oklahoma, 25.9 per cent in Mississippi, 24.5 per cent in 

 Texas, 20.6 per cent in Louisiana, and 12.5 per cent in Arkansas. 

 Analyzing these figures from another standpoint, we find that the 

 State of Mississippi leads in parasite control with 14.27 per cent, 

 Oklahoma standing next mth 4.71 per cent, Texas vnth 3.9 per cent, 

 Louisiana with 2.52 per cent, and Arkansas with 0.71 per cent. The 

 relative rank of the States for predatory control is quite different. 

 Oklahoma leads with 22.16 per cent, Texas comes next with 20.6 per 

 cent, Louisiana with 18.1 per cent, Arkansas with 11.82 per cent, 

 and Mississippi with 11.63 per cent. In climatic control Texas leads 



