-200- 
A decoction of this species mas «n effective stomach poison against 
llalaoosoma noustria (L.) in Russia. A tobaooo decoction prepared as 
given by Glaeenapp killed 62*6 percent of the oabbage worms tested.— 
Goriainor (166 ) . 
A 6i6»3 mixture of tobacco, hydrated lie©, and eater proved a Tory 
efficient insecticide against currant worms, various aphids, leafhoppers, 
and many other insects under both laboratory and field oondition*.- 
Haley and ooworkers ( 177 ). 
In Russia a tobaooo- extra ot spray (0.5 percent nicotine) paralysed 
flea beetles in 15 minutes. Applied undiluted, tobaooo dust was Tory 
effective in protecting radish and cabbage seedlings against flea 
beetles, but it proved of little value against lepldopterous larvae and 
various Rhynchota or against Bruohus pisorum (L.) on peas. — Bondarovioh 
(67)* 
KI COTI AHA SYLVESTRI8 Speg. « Cooes. 
This weed contains nornicotine, an alkaloid of proved inseotieidal 
value and of greater potency than nicotine for the ocntrol of oertain 
insects.— Roark (541 ). 
1 -Nornicotine obtained from the leaves of this species grown at 
Ithaca, H. Y., was tested against the bean aphid. The plants yielded 
1*4 percent of orude alkaloids, of which 67 percent was nicotine and 48 
percent nornicotine. All the nornicotine* tested seemed more toxic than 
natural nicotine, substantiating earlier work with the raeesdo compound. 
1-Hornicotine is doubtfully more toxic than the dextro or inactive form. 
The d-niootine is much less toxic than the levo form, but no such pro- 
nounoed difference exists between the two forms of norniootine. The 
data indicated that extracts of this plant might yield an insecticide 
superior to nicotine in toxicity to some inseots.— Hansberry and Morton 
(182) . 
HICOTIAHA TABACUM L. Common tobaooo. 
Host, if not all, of the commercial nicotine is derived from this 
species. 
PETUNIA HYBRIDA Vilm. Common petunia. 
Extracts were not repellent to the Japanese beetle.— Metsger and 
Grant (277). 
PETUNIA sp. 
A decoction of petunia was recommended as an inseotioide.— Sprenger 
(373). 
