AFeJ^,Pih9air?"  )       Plants  Used  as  Insecticides.  91 
in  the  Naval  service  and  glad  of  the  recognition  the  Navy  ha^ 
accorded  them. 
E.  FULLERTON  COOK, 
Secretary,  N.  P.  S.  A. 
PLANTS  USED  AS  INSECTICIDES.1 
By  R.  C.  Roark. 
(Continued  from  page  37.) 
Echinops  echinatus  Roxb.  Composites. 
"  The  roots  are  pounded  and  applied  to  the  hair  to  destroy  lice, 
also  the  powdered  roots  applied  to  wounds  in  cattle  to  destroy  mag- 
gots."   (Burkill,  quoted  by  Greshoff,  191 3.) 
Erigeron  viscosus.  Composite?. 
In  Greece,  bunches  of  this  plant  are  hung  over  the  beds,  and  all 
insects  that  alight  upon  it  are  held  fast  by  its  sticky  exudation.  Lan- 
derer  found  that  fumigation  with  it  did  not  narcotize  insects  as  is 
the  case  with  Caucasian  pyrethrum,  but  did  drive  them  away.  (Lan- 
derer,  Bonplandia,  Vol.  10,  No.  22,  November  15,  1862,  p.  342.) 
Erigeron  viscosus  is  one  of  the  most  frequent  plants  of  Greece 
where  it  is  called  psyllochorton,  or  flea-plant.  Being  very  viscous 
before  flowering,  it  is  placed  in  the  beds  of  children  to  attract  the 
fleas,  which  adhere  to  it.  The  fumes  of  the  burning  plant  have  the 
same  stupefying  effect  upon  the  mosquitoes,  Sknipes-kenopes  {Culex 
pipion)  as  fumigations  of  Caucasian  insect  powder.  (Landerer, 
Am.  J.  Pharmacy,  4th  series,  Vol.  5,  November,  1875,  pp.  49S-499.) 
Eucalyptus  Globulus  Labill.    Myrtacece.    Blue  Gum-tree.  Vic- 
toria and  Tasmania. 
Leaves  =  Eucalyptus  U.  S.  P.  IX. 
Branches  of  Eucalyptus  will  drive  mosquitoes  and  other  insects 
out  of  rooms,    (von  Mueller.) 
EUPATORIUM  AMARISSIMUM  L.  CompOsito?. 
Listed  as  an  insecticide  by  GreshofT. 
1  Contribution  from  the  Insecticide  and  Fungicide  Laboratory,  Miscel- 
laneous Division,  Bureau  of  Chemistry,  Department  of  Agriculture,  Wash- 
ington, D.  C. 
