- sg - .. 
Treatment '■ Mortplity 
■ . "■- Tercent 
Derri? Uo percent, gulfur 60 percent-, . 
(rotc-nonc 1»6 percent) Uq.1 
Derris 20 percent, sulfur 80 percent ' 
(rot-nono 0.8 p--^rcent) . ., ^g".7 
Derris 10 percent, sulfur 90 p-rcent 
(rotr^none O.U percent) 27.6' 
Ferris (rotnnone h -Dercent) . _ 72.5. 
Cube ( rot enone h percent) . ' S3?'-^ 
Devil^p-choestriugs (rotenone 1.7 
percent) 37*'^ 
Calcium arsenate 77*0 
Check 15»7, ' ■' 
S-^.ith and Sc^Ie? (^^2) in 1937 r-ported the rrpult? cf • insecticic'.- 
t-^^^te against 3 cotton insect?. Tests wer* Dlene.ec. to com-D">re derris, 
cube, and devil' s-shbe strings.:' containing equal, nuantities of rotenonr, 
in mixtures with sulfur. The mixture <=• were prepared, ho'rrev-r, b'-fore 
the analyses Vrere recei-ved, and- th.=! rotenone; cent '^nta of the mixtur's 
are only approxiriately eqiial. Cube contpining '^.'^ "':^ercent of rotenone 
produced a. higher mortality of boll wep'^-il- than did derris containing 
3.9 perqontof rotenone, de^H' s-shoestrings Cl.7 p^^rcent of rotenone), 
or calcium arsenate. The .mortality from calcium arsenate, how-vrr, was 
higher than' that from derris, devil' n-shoogtrings, or mixtures of cube, 
derris, and devil' s-shocritri'-:gs with sulfv.r. The results were as follows! 
mterial Mortality . Co.ntrol 
P..-rc-r:t , P?rce.n^ 
Derris-'^ulfur Uo:6o (rotenone I.56) 
Derri=!-oulfur 20:80 (rot^^nonn 0.78) 
Derris-sulfur 10:90 (rotenon*^- O.39) 
Cube-sulfur Uo:6o (rotenone 1,96) 
Cube- sulfur 20:80 (rotenone O.98) 
Cube-sulfur 10:90 (rotenone O.ij-9) 
Lpvil' s-shoe.strings-sulfur 9^^:^ (rot^non- 
Devil' s-shoestri:-:gs-sulfur ^7^=3 (rotenrr,; 
Devil' s-shoestrlngs-sulfur 23.5: 7'-, 5 
(rotenone O.U) 
I'erris (rot-none 3-9, tot^l extrecti'-'ep 11,6) 
Cube (rotcnonf U.9, tot^d extracti^^es 17) 
Devil' 3-shoestrings (rotenone 1.7, tot-'^l 
tract ives 7.5) 
Calciv'-m arsenate I'o, 2 
Checks 
^-19 ' 
uo, 
39 
27 
28 . . , 
ih 
53 
U5 
•■39 
28 
• 21 
6 
1.6) 37 
25 
0.8)38. ■■ 
26 
• ^1 
18 
.6) 72 . 
67 
83 
80 
:X- 
37 ■ 
26 
77 
73 
16 
— 
