-199- 
Th* ehoofly is an inaeot-rspelling plant* To repel flies distribute 
five or six plants about the room* A few dosen plants evenly distributed 
in the greenhouse will cause the white fly to disappear* Planted out of 
doors, the shoofly will grow rank* Several hundred planted near a barn, 
where oows were milked out of doors, apparently kept the animals fron 
being bothered by insects*— Altrlchter (39), 
This speoies was used In India as an insecticide.-- Chopra and 
Badhwar (98) • 
HICOTIANA epp. 
Tobacoo and its ohlef alkaloid, niootine, hare been used as insecti- 
cides sinoe 169C, the literature of which was reviewed up to 1934. Only 
three speoies (*• glauea , rust lea , and tabaoun) had been tested inseoti- 
oidally up to tbj. s dat e'*— Melndoo and coworkers ( 256 , 267) • 
During the present search for inseotioidal plants one more species 
(H* eylvcstris ) has been added to the list* The literature on nicotine 
and tobacco has been reviewed through 1942. but no other species were 
used against insects, although 29 or more speoies of Hi cot i ana have been 
analysed by ohemists* 
I1C0TIASA GLAUCA Graham. Tree tobacco. 
This speoies of tobacoo was recommended as an insecticide.— Sprenger 
(373). 
An infusion and a decoction of the leaves with soap had only a very 
slight eff eot on nasturtium aphida. while the powdered leaves had no ap- 
parent effect on them* An analysis of the leaves showed that the nioo- 
tine content was only 0*18 peroent*- Molndoo and Si overs ( 269 , p. 23)* 
The tree tobacoo in the southwestern part of the United States con- 
tains anabasine, an alkaloid similar to nicotine but even more potent 
as an aphicide* There was evidence that anabasine might prove as valuable 
an insecticide as nicotine*— Roark (341 ) * 
HICOTIANA RUSTICA L* Wild tobaoco. 
This speoies of tobacco was also recommended as an insecticide.- 
Sprenger ( 373 )* 
Apple trees were sprayed twice in 1 day with an extract prepared 
by boiling 1 pound for 16 minutes in 3 gallons of water and diluting 
with 6 gallons of water* This spray destroyed Psylla mall (Schmb.), 
young oaterpillara of Cheimatobla brnmata (L*) , Tortricidae, and simi- 
lar pests in Russia*- Glasenapp U62). 
