Caraliidae 
Zabrus tf^npbrioides (G-oeze)C^^ zi'b'bus F.) 
Resistant to a dust containing 2 loercent of rotenone. — Anonymous 
(2) in 1937. 
Cerajn'bycidae 
Gracilia minuta P. 
Sensitive to derris dust. — DeBussy et al . (61 ) in I936 
Perisqus laetus Lamcere 
Feeds on derrip roots in storage, — Federated Malay States Depart- 
ment of Agriculture (l2U ) and Miller (2^) in 19^U, 
Pterolophia melanura Paso. 
Feeds on derris roots in storage. — Fedcrat<^d Malay States PeT^art- 
ment of Agriculture (I2U) and Miller (2S5_) in 19^U. 
Chrysomelidae 
JLltlca ampelophaga Guer. 
Chevali(-r and Laf fond (Sl) in I938 reported that the toxicities 
of dusts contaning different aniounts of derris, cu"bc, or rotenone vrere 
tested on adults of Bhaphidopalpa foveicollis Lucas on melon, and on 
larvae and adults of ^altica ) Altica ampelophaga G-uer. on grapevines 
in Algeria. Determinations were made of the contents of rotenone and 
other extractives in I3 commercial dusts containing cube or derris 
alone or with a diluent. Experiments were arranged to teat the toxic- 
ity of rotenone (using talc impregnated with a solution of pure rote- 
none), of derris diluted with talc, and of commercial dusts of knovrn 
composition. Each powder vras tested on 10 larvae and 10 adults in "^ 
ways — by rolling the insects in the dust, by dusting them from a distance 
of 15 centimeters, and by placing them on povfdered foliage. Control in- 
sects were treated similarly with pure talc. Mortality varied directly 
with the content of active material. A dust containing 0.25 or 0.5 per- 
cent of rotenone appeared to b^ effective, although commercial products 
usually contain more. Dusts containing plant material were more effect- 
live than talc with the same rotenone content, which showed the insecticidal 
value of the other extractives. The rate of action of the insecticides 
appeared to be practically independent of the method of application. 
There was considerable difference in the toxicities of some of the com- 
mercial products with nearly the spjne rotenone contrnt. 
Altica ignita 111. , a strawberry flea beetle 
Fenton (igj) in 19*^6 referred to wor> at Dickin=:on, Tex., bv Rom^y, 
who found thpt a dust containing- rotenr^ne (0.5 percent) and also pyrethrurn 
and sulfur controlled this beetle. 
