-193- 
SOLahACEAB 
(Nightshade or Potato Family) 
ATROPA BKLIADONHA L. Belladonna* Deadly nightshade* 
In 1915 and 1916 Molndoo and Sievers did considerable work with the 
powders and extracts of belladonna but the results were not published* 
The various preparations had little or no effect on houseflies, German 
oookroaohes, fall webworms, oatalpa oa<**rpi liars, silkworms, and honey- 
in alcoholic extract and a deoootion of the leares had no effeot 
on cotton caterpillars.— Riley (325, p« 184)* 
Extract of belladonna (10 peroent in water) had no effeot on the 
oaterpillars of Prodenia litura (F*) • — DeBussy ( 76) • 
Commercially prepared extracts were not significantly toxic to the 
bean aphid.— Tatter sfi eld and ooworkers ( 393) * 
In India belladonna was reported to hare inseotieidal or repelling 
properties.— Roark (332 , p. 4)* 
Extracts applied as sprays against adult mosquitoes were such in- 
ferior to the standard nosquitooide*— Wats and Singh (421) • 
The alkaloid atropine is found in Atropa belladonna and in the seeds 
of Datura stramonium , but the following papers on atropine will be dis- 
cussed here* 
A weak concentration of atropine after an hour had a tendency tb 
reduoe the heart sot ion of the larva of Corethra crystalline (Peg.) .— 
Dogiel (120). 
An aqueous solution of atropine sulfate and tincture of belladonna, 
eaoh mixed with honey, did not affect ants*— Cobelli ( lOO) . 
Hypodermic injections of atropine sulfate produced in large cater- 
pillars loss of creeping ability, segmental tremblings, and contractions, 
with slight stimulation of the dorsal nusoles. — Crosier (110 , pp. 242- 
246). 
The mini mum concentration of atropine sulfate required to kill a- 
bout 95 peroent of bean aphids was 6 gn* to 100 co* of liquid, while 
that of niootine sulfate was 0.009 fm.— Richardson and 8ml th (322) ♦ 
Atropine sulfate (0*001 pound per 50 gallons of water) in a spray 
did not kill Japanese beetles within 6 days.— Moore and Campbell (284, 
p* 400)* 
