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LACTUCA VIROSA L. Lactucariura. 
A 10-percent concentration in flour had no perceptible effect on 
Prodenia lltura (F.) •— DeBussy (76) . 
LEONTODON TUBEROSUS L. Synonym: ThrincJB tuberose DC. 
The opened flowers and roots were inactive «?ainst flies and dog 
fleas. — Pa8serini (303). 
LIATRIS SPICATA (L.) Willd. Spike gayfeather. 
Extracts were not repellent to the Japanese beetle. — Metzger and 
Grant (277). 
MATRICARIA CHAMOMILLA L. Synonyms » Chrysanthemum chamomilla Bernh., 
Chamomilla vulgaris S. F. Gray. German false-camomile. 
The flower heads had an action similar to that of Persian insect 
powder.~Schenck ( 356 ). 
The dried fresh flowers had an effect on the oriental cockroach 
somewhat similar to that of pyrethrum.~Glover ( 16 5, p. 133). 
The powder was inert towards roaches .--Hirschsohn ( 194 ) . 
Camomile flowers were ineffective against bedbugs and roaches.— 
Scott, Abbott, and Dudley (361 , pp. 5, 13). 
The flowers kill lice, although very slowly, but have little effect 
on flies and ants.— Passerini ( 303 ) . 
Extracts from camomile were not repellent to the Japanese beetle.— 
Metzger and Grant ( 277 ) . 
Extracts from the leaves and stems killed only 5 percent of the 
mosquito larvae tested. — Hartzell and Wllcoxon ( 188 ). 
MATRICARIA INODORA L. Scentless false camomile. 
The flowers have a benumbing effect on flies, acting within 1 or 
2 hours.— Kalbruner ( 224 ) . 
MATRICARIA MATRICARIOIDES (Less.) Porter. Synonyms t M. discoidea DC, 
M. suaveolens Buehenau. Rayless false-camomile. 
A decoction was ineffective against Malacosoma neustria (L.).~ 
Goriainov (166). 
