Ajanli°ary  ^i™"  ^       Plants  Used  as  Insecticides.  35 
Powdered  cimicifuga  seemed  to  be  devoid  of  insecticidal  prop- 
erties. Crickets  (Gryllus)  kept  in  contact  with  the  powdered  drug 
for  hours  showed  no  toxic  effect.  ...  As  a  fumigant  cimicifuga 
proved  unsatisfactory,  acting  more  as  an  anaesthetic  than  as  an  in- 
secticide. .  .  .  The  fluid  extract  of  cimicifuga  was  tried,  employing 
the  contact  method  in  open  jar.  This  preparation  of  the  drug  proved 
more  effective,  killing  the  insects  almost  instantly,  but  it  was  also 
observed  that  alcohol  alone  (which  is  the  menstruum  used  in  the 
manufacture  of  the  fluid  extract)  would  produce  practically  the 
same  result,  although  recovery  was  noted  in  some  cases.  Aqueous 
preparations  of  cimicifuga  were  ineffective.  (Sayre,  Trans.  Kan- 
sas Academy  of  Science,  Vol.  25,  1913,  pp.  140-141.) 
Citrullus  Colocynthis  (L.)  Schrad.    Cucurbitacece.  Synonyms: 
Cucnmis  Colocynthis  L.,  Colocynthis  vulgaris  Schrad.  Colo- 
cynth.   Asia,  Africa  and  southern  Europe. 
The  decorticated  fruit  =  Colocynthis  U.  S.  P.  IX. 
A  decoction  of  colocynth  serves  as  an  insecticide.  (Greshoff.) 
Cleistanthus  collinus  Benth.  &  Hook.  Euphorbiacece. 
"  The  bark  must  contain  some  poison  property,  for  not  only  dch 
white  ants  leave  it  severely  alone,  but  it  is  used  here  for  poisoning; 
fish.  The  inner  bark  placed  on  the  sores  of  sheep  and  goats  is 
efficacious  in  healing  them  and  in  destroying  maggots."  (W.  F. 
Biscoe,  Indian  Forester,  June,  1896,  quoted  by  Greshoff.) 
Cracca  sp.    Fabacece.    Synonym  :  Tcphrosia  Pers. 
Warm  and  tropical  regions. 
U.  S.  Patent  1,242,954.  A  compound  for  use  as  an  insecticide 
and  sheep  dip  is  formed  from  sulphur  soap  and  comminuted  Te- 
phrosia  {Cracca)  plants,  seeds  or  leaves.  U.  S.  1,242,955  specifies, 
for  the  same  purpose,  a  benzine  extract  of  Tephrosia  {Cracca)  0.5 
to  1,  soap  4,  and  dilute  alcohol  15  parts. 
Croton  flavens.  Euphorbiacea. 
Used  for  the  destruction  of  insects  in  Venezuela.  Thorns  found 
the  dried  plant  to  have  no  effect  on  roaches  (Blatta  orientalis)  nor 
on  flies  nor  gnats.  (Thorns,  Ber.  der  deutschen  Pharm.  Gesell- 
schaft,  Vol.  1,  Heft  8,  1891,  p.  241.) 
Croton   Texensis,   Croton   glandulosus,   Croton  capitatus. 
Croton  monanthogynus.    Euphorbiacece.    Goat  Weed. 
The  decoction  from  leaves  and  blossoms  was  without  effect  on 
cotton  worms  (Aletia) .  (Riley.) 
