-73- 
Water extracts of the whole plant killed only 20 percent of the 
mosquito larvae tested.— Hartzell and Wilcoxon ( 188 ) . 
KALMIA ANGUSTIFOLIA L. Lambkill. 
The dried leaves had no effect on fly larvae.-- Cook and Hutchison 
(103 , p. 4). 
The powdered leaves had no effect on grasshoppers and honeybees •— 
Mclndoo and Sievers (259 , p. 22). 
Extracts were not repellent to the Japanese beetle.— Metzger and 
Grant (277). 
KALMIA LATI FOLIA L. Mountain laurel. 
Infusions of the dried leaves had no effect on fly larvae in horse 
manure.— Cook and Hutchison ( 103 , p. 4). 
Extracts were not repellent to the Japanese beetle. — Metzger and 
Grant (277). 
LEDUM GROENLANDICUM Oeder. Synonym: L. latifolium Ait. True 
Labrador-tea » 
This plant was reported to kill lice and other insects.— 
Williams (428 , p. 916). 
LEDUM PALUSTRB L. Crystal-tea. 
It was reported from Austria that this plant killed lice, bedbugs, 
fleas, moths, and other insects. It was most active when green and in 
blossom, but the dried material was also effective.— Anonymous (3). 
The Reaves and twigs were used as an insecticide.— Lyons (248 , p. 
266). 
LEUCOTHOE GRAYANA Maxim. 
Extracts of dried leaves were sprayed on larvae of various insects 
in Japan. Some of the samples seemed to be fairly toxic to Phaedon 
brassioae Baly, 50 to 80 percent being killed, but most of them were 
not effective enough to be promising as insecticides.— Harukawa ( 189 ) . 
LYOKIA OVALIFOLIA (Wall.) Drude. Synonyms: Fieris ovalifolia (Wall.) 
D. Don., Andromeda ovalifolia Wall. 
In India the younr leaves and buds were used to kill insects, and 
an infusion was employed in cutaneous diseases.— Watt" (422, v. 3, p. 90). 
