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GUAREA RUSBYI (Britton) Rusby. Cocillana. 
Extracts from the dry bark were repellent to the Japanese beetle.— 
Metzger and Grant (277 ) . 
MELIA AZEDARACH L. Synonym: Azedaraoh oommelini Medio. China berry. 
Dharek. 
Much has been written on the China berry as an insecticide, but 
only a few abstracts will be given here. 
Decoctions and alcoholic extracts from the leaves, twigs, and 
berries had considerable effect on cotton caterpillars but were not 
efficient.— Riley ( 325 , p. 185). 
Water extracts of the berries were efficient against honeybees and 
had a slight effect on cockroaches. The powdered leaves and water ex- 
tracts (not filtered) of this powder were efficient against silkworms, 
but had only a slight effect on aphids and tent caterpillars. The 
alcoholic, ether, and petroleum-ether extracts were lethal to bees, but 
a strong alcohol! o extract did not kill any of the silkworms tested. 
The alcoholic and benzene extracts, used with soap, were inefficient 
against aphids.— Mclndoo and Sievers ( 259 , p. 8)« 
Tfater extracts, macerated juices, and dusts of the leaves had some 
effect on a psylla, aphids, lucerne weevil grubs, and adult beetles 
(Aulacophera abdominalis F.) but were inferior to tobacco.— Chopra 
(97,- pp. 106, 109). 
In soil treatment of wheat plots in India, leaves of dharek applied 
at the rate of 7 tons to the acre reduced the termite attack to 0.7 per- 
oent as compared with 8 percent in the untreated plots.— Husain (206 ). 
In Russia neutral, acid, and alkaline alcoholic extracts of the 
fruits were prepared at the rate of 32 gm. of fruits per 100 cc. and 
tested as sprays on the cabbage aphid. The alkaline extracts were the 
most effective, giving 97 to 98 peroent mortality 48 hours after appli- 
cation. An alcoholic extract of the seeds (oil extracted) gave 33.6- 
percent mortality.— Astrakhantzev and coworkers (41, pp. 455-457) • 
In Algeria the China berry is not touched by locusts, and culti- 
vated plants sprayed with extracts prepared from its leaves are repel- 
lent to them. The active principle can be extracted with hot water, 
alcohol, chloroform, or benzene, but not with petroleum ether. The 
extract from 2 pounds of dry leaves in 10 gallons of water afforded 
effective protection against four species of gr as shoppers .—Volkonsky 
(412, 413). 
