IXDKX. 7^) 



I'llk'O. 



Cotton forms luinjjitiLr. moilalily <>t" l>oll \v(r\ il ;{(). :\\ xi ;;{ 74 



|)roi)orlion (Icstroycd l)y iialiinil causes vt-isiis Ix.ll weevil allaek. (il 72 



retention hy plant of thosi* dead L'.") L'(i 



vei-sus .slieddinu; for control of ill. 11 wees il .. \\\ ;};{ 



leaf-worm. {Sec Leaf-worm, cotton.) 



ri'tention hy plant of dead s(juares and ludls . '2'> li(i 



stalks, fall destruction for control of holl weevil. . ... is III. 7:J 



wide spacini; for conlmi of holl \vee\ il . . ... 45 -47, 75 



Culiund conditions in control of holl weevil 43-51, 74 



practices, value in control of holl weevil IH-H). 73, 70 



JuldloiiiiiKi lithi iriildtuiii, failure to maintain itself in Texas 2'.] 



(Jelatini/.ation. {Sec Proliferation.) 



Heat and dryini:, factor in control of holl weevil I'M';). 27 2'.». :U). 31. 32, 



34-35, 3(), 37, 38. 40-41. 42^13. 47 50. 51-53. 51 5i), (iO. (il, (12. (i3, 71 75 

 Humidity {s<r aho Raintall). 



as affi'ctinu; ahundanc(> and injuriousness of holl wee\il II I2 



relative 3!l 



Jcld'us hyj)()nu'la.s, enemy of holl weevil 22 



' Kelep." (See Ectatoinma tuberculatum.) 



Leaf-worm, cxitton. factor in control of boll weevil I !>. 20, 2 1 22, 73 



Louisiana, boll weevil control by winter conditioniv Hi 17 



dispersion 1 (> 



■western, boll weevil mortalit y 54-55, (J 1 . (i2-()3, 75 



Parasites, factor in control of l)oll weevil U), 20-21, 23, 2(), 27-29, 30, 31, 



33, 34, 37, 38, 40-11, 42, 43-44, 49, 50, 51-53, 54 59, (iO, (il, ()2, (i3, 74, 75 



Proliferation, factor in control of boll weevil 19, 20, :i3, 35 



Rainfall (see also Humidity). 



as affecting mortality of boll weevil 13-15, 



17, 37, 38-39, 40-41, 42-43, 47-50, 75 

 Solejiopsis (jeniinata (see also Ants), 



enemy of boll weevil 24-25, 33 



Squares, fallen, holl weevil mortality 29, 30, 31-32, 33, 44, 47, 51, 54-59, G1-G2, 75 



]>roportion destroyed by boll weevil versus natural causes G5, 



70, 71, 72, 70 



hanging dried, holl wee\'il mortality 27-28, 



30, 31-32, 33, 44, 51, 54-59, CO, (il , 75 

 proportion destroyed by boll weevdl versus natural 



causes 66, G8, 7 1 , 72. 7(5 



proportion among fallen cotton forms ()4, 76 



retention by plant of those dead 25-26 



versus bolls, mortality of boll weevil 33-35. 74 



Statistical data, value in study of natural control of holl weevil 25 



Temperature (see also Heat and drying). 



as affecting mortality of boll weevil 11 -19. 37, 40 43. 17 50, 73, 74, 75 



Texas, central, boll weevil mortality '>7 .")S. d I . (i2-(i3, 75 



eastern, boll weevil mortality 55, (il, (i2-G3, 75 



northeastern, holl weevil mortality. 58-59, 62-63, 75 



northern, boll weevil mortality 61 



southern, boll weevil mortality 56-57. 61, (52-63, 75 



southwestern, 1)<>11 weevil mortality 59, 61, 62-(53, 75 



o 



