-4- 
This is a continuation of the series of papers begun by R. C. 
Roark, which reviewed all the available information on the ir.secti- 
cidal uses' of rotenone and the rotenoids up to 1938. Twelve parts 
of his review have been published in E-579; E-581; E-593; E-594; E- 
598; E-603; E-625; E-630; E-652; E-654; E-655; and E-656. The pres- 
ent paper reviews the publications dated 1938 through 1943, and 
several dated 1944. Species belonging to Derris , Loncho carpus , Te- 
phrosia, Mandulea , Millettia, Pachyrhizus , and Calopogoniuro are "dis- 
cussed. The continued interest in these plants as sources of insecti- 
cides is shown by the publication, during the last 6 years, of more 
than 80G articles describing tests upon insects witii preparations 
containing rotenone or its congeners* 
Information on the cultivation and marketing of derris, cube, 
and timbo has been assembled by the writer and will be published 
separately. Of the authors cited in this compilation Fallon (175) 
gives the most information on the economic aspects of the rotenone 
plant 8. 
LEPIDOPTERA 
Aegeriidae 
Melittia cucurbitae (Harr.) ( ssatyriniformis (Hbn.)), the squash 
borer. 
In Connecticut the 1940 tests indicated that a 1-percent roten- 
one dust was equal, if not superior, to lead arsenate and fish oil. 
In 1941 the 1-percent rotenone-treated plots had a significantly 
lower infestation than plots treated with a proprietary dust (walnut- 
shell flour impregnated with rotenone) but were not significantly 
lower than plots treated with lead arsenate, A year later a 1-per- 
cent rotenone dust gave effective control, particularly on early plant- 
ings when the borer population was high. The use of a pyrophyllite 
diluent instead of the one used (Bancroft clay) might increase its 
effectiveness still xriC-re. — Beard (40 , 41) * 
In Massachusetts sprays were consistently superior to dusts in 
1938. The percentage reduotion of injury to squash vines was 88.5 
for a spray of 1 percent of summer oil with 0.5 percent of nicotine 
sulfate, 81.5 for a wettable cube spray (4 lb. in 100 gal. of water), 
and 77.8 for a cube-clay dust (0.6 percent of rotenone) .—Bourne and 
YEhitcomb (73) . 
