^ebJruarV,Pih9aiT' )       Plant s  Used  as  Insecticides.  99 
With  cotton  worms  (Aletia)  no  result  was  obtained  with  the 
alcoholic  extract  of  this  plant.  (Riley.) 
Millettia  auriculata  Baker.  Leguminosce. 
The  root  is  used  as  an  insecticide.    (Greshoff,  1913.) 
Monarda  punctata  L.   Labiatce.   Horsemint.    Eastern  U.  S. 
The  alcoholic  extract  of  the  leaves  was  ineffective  against  cotton 
worms  {Aletia).  (Riley.) 
Myrica  cerifera  L.  Myricacece. 
Maryland  to  Florida,  west  to  Texas. 
The  Welsh  lay  branches  of  it  upon  and  under  their  beds  to  keep 
off  fleas  and  moths.    (Quoted  by  Porcher.) 
Nelumbo  lutea  (Willd.)  Pers.    Nelumbonacece.    Synonym:  Ne- 
lumbium  luteum  Willd.   American  Lotus  Lily.   Eastern  U.  S. 
According  to  Schaffner  it  is  said  to  be  used  to  destroy  cock- 
roaches. (Pammel.) 
Nerium  Oleander  L.  Apocynacew.  Synonym :  Oleander  vulgaris 
Medic.    Oleander.    Mediterranean  region. 
The  bark  is  very  frequently  used  for  the  destruction  of  rats  and 
insects.  (Ed.  Schaer,  Arzneipflanzen  als  Fischgifte,  1897;  quoted 
by  Greshoff.) 
Nicotiana  Tabacum  L.   Solanacece.   Tobacco.   Tropical  America. 
The  use  of  tobacco  powders  and  extracts  (nicotine)  for  insec- 
ticidal  purposes  is  well  known. 
Pachyrhizus  tuberosus  Spreng.  Leguminosce.  Synonym :  Doli- 
chos  tuberosus  Lam. 
The  seeds  (in  decoction  or  in  the  form  of  powder)  are  used  in 
Merida  (Venezuela)  for  killing  vermin.  (Ernst,  quoted  by  Gres- 
hoff.) 
Padus  Virginiana  (L.)  Mill.  Rosacece.  Synonyms:  Cerasus 
serotina  Lois,  Prunus  Virginia  L.  Black  Cherry.  Eastern  U. 
S.    Bark  =  Prunus  Virginiana  U.  S.  P. 
Persicaria  Hydropiper  (L.)  Opiz.  Polygonacecu.  Water-pepper, 
Smartweed.    Europe,  nat.  in  U.  S. 
Neither  the  decoction  nor  alcoholic  extract  of  the  leaves  was  ef- 
fective against  cotton  worms  (Aletia).  (Riley.) 
It  is  found  a  convenient  and  useful  application  for  driving  off 
