INDEX. . 79 



Cotton forms hanging, mortality of boll weevil ' 30, 3 1 33, 73 7 1 



proportion destroyed by natural causes versus boll weevil attack. til 7:2 



retention by plant of those dead 25 26 



versus shedding for control of boll weevil 31 33 



leaf-worm. (See Leaf-worm, cotton.) 



retention by plant of dead squares and bolls • 25 26 



stalks, fall destruction for control of boll weevil 18-19, 73 



wide spacing for control of boll weevil 45-47, 75 



Cultural conditions in control of boll weevil 43-51, 74 



practices, value in control of boll weevil 18-19, 73, 76 



Ectatomma tuberculatum, failure to maintain itself in Texas 23 



Gelatinization. (See Proliferation.) 



Heat and drying, factor in control of boll weevil 19, 23, 27-29, 30, 31, 32, 



34-35, 36, 37, 38, 40-41, 42-43, 47-50, 51-53, 54-59, 60, 61, 62, 63, 74-75 

 Humidity (see also Rainfall). 



as affecting abundance and injuriousness, of boll weevil 1 1-12 



relative 39 



Icterus hypomelas, enemy of boll weevil 22 



"Kelep." (See Ectatomma tuberculatum.) 



Leaf -worm, cotton, factor in control of boll w T eevil 19, 20, 21-22, 73 



Louisiana, boll weevil control by winter conditions 16-17 



dispersion 16 



western, boll weevil mortality 54-55, 61, 62-63, 75 



Parasites, factor in control of boll weevil 19, 20-21, 23, 26, 27-29, 30, 31, 



33, 34, 37, 38, 40-41, 42, 43-44, 49, 50, 51-53, 54-59, 60, 61, 62, 63, 74, 75 



of boll weevil more abundant in hanging than in fallen forms 30 



Proliferation, factor in control of boll weevil. 19, 20, 33, 35 



Rainfall (see also Humidity). 



as affecting mortality of boll weevil 13-15, 



17, 37, 38-39, 40-41, 42^3, 47-50, 75 

 Solenopsis geminata (see also Ants). 



enemy of boll weevil 24-25, 33 



Squares, fallen, boll weevil mortality 29, 30, 31-32, 33, 44, 47, 51, 54-59, 61-62, 75 



proportion destroyed by boll weevil versus natural causes 65, 



70, 71, 72. 76 



hanging dried, boll weevil mortality 27-28, 



30, 31-32, 33, 44, 51, 54-59, (iO, 61, 75 

 proportion destroyed by boll weevil versus natural 



causes 66, 68, 71, 72, 76 



proportion among fallen cotton forms 64, 76 



retention by plant of those dead 2.") 26 



versus bolls, mortality of boll weevil 33 •">:>. 7 I 



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



Temperature (see also Heat and drying). 



as affecting mortality of boll weevil II 19, 37, 10 43,47 50,73,74,75 



Texas, central, boll weevil mortality : 57-58, 6 L, 62 63, 75 



eastern, boll weevil mortality 55,61,62 (i: 1 .. 75 



northeastern, boll weevil mortality 58 59, 62 63, 75 



northern, boll weevil mortality 61 



southern, boll weevil mortality 56 57.61,62 63, 7.') 



southwestern, boll weevil mortality 59, 61, 62 63, 75 



o 



