-213- 
TUBA HANTD, TUBA JANIROK, TUBA RIAM, TUBA SASAN, TUBA TAPAH. 
Five-peroant water extracts of the roote of these Malayan fish- 
poison plants were tested against moth larvae ( Paras a herbifera (Wlk.))« 
An extract of the first plant killed 40 percent of the larvae, an ex- 
traot of the second, 100, extracts of the third and fifth 0, and an 
extraot of the fourth 20 percent.— Gat er ( 153 ). 
WEEDS. 
Powder made from weeds and grasses in the neighborhood was found 
to be an efficient mosquito larvicide when spread on the surface of the 
water. Powders thus used killed mechanically, rather than by poisoning 
the larvae.-- Thibault (597) • 
TAHOOT. 
The roots were tested in a preliminary manner for inseotloidal 
value*— Fryer and coworkers (147 ). 
