_ 4 " 
Sinoxylon ru::icauda Lesne 
Feeds on derris roots ir storage — Federated lliala^,- States Departient 
of Agriculture ( 124) and Miller (285) in 1934. 
Sinoxylon sp« 
Feeds o-jTi derris roots in storage, --Cahn (64) in 1935, 
Xylopsocus capucinus ( F. ) 
Feeds on derris roots in storage,— Corbett (36) in 1931; Federated 
KalaA- States Departr/.ent of Agriculture (123) in 1933'Vid (124) in 1934; and 
Miller (285) in 1934. 
_Xylothri-os flavipes (ill,) I 
Feeds on derris roots in storage, — Federated I'alay States Depart:ient 
of Agriculture (124) and Ililler (285) in 1934, 
Bostrichidae (unidentified species) 
Tyro s-oecles of Bostrichidae feed on derris roots in storage .--'Tater 
(162) in 1925. 
Bruchidae 
Bruchus_ p_isoriTiT!_ (L, ), the pea v/eevil 
Ewvayaraa and Endo (251) in 1935 reported that derris-soap and Neotoiifv- 
soap sprays proved to be the most effective against the pea -weevil. It r.^as 
recommended to spray these solutions three or more times during the young 
pod stage in July, > 
The United States Departrient of Agriculture, Bureau of Entomology 
and Plant Quarantine, in its ar^aual report for 1936 ( 39_3 ) reported that 
experiments indicated that dust mixtures containing rotenone mB-y be useful 
in the control of the pea vreevil, particularly in crops of high-quality peas, 
An ancnym.ous (_l) writer on August 19, 3 937, called attention to the 
use of rotenone dusts to control the pea vreevil in the Pacific Northwest. 
The rotenone method of attac>:ing pea r/eevils takes 
advantage of their habit of congregating on the first pea 
to bloom. To lay the foundation for the attack, growers 
plant narrow border trap crops which tHI bloom, earlier 
than the main field. The border is dusted iust preceding 
the appearance of blooms in the main field. The weevils 
congregate on the peas in bloom to feed and deposit their 
eggs. 
Derris extract in fisli oil, 
