-23- 
30 percent of sulfur in the form of fused . bentonlte sulfur, which aids 
as a sticker' for the rotenone ^nd also ?.cts as an activator. 
Hamilton ( 180 ) in. 1938 reported that canker^orms on various shade 
trees were satisfactorily controlled by a Sj.ray.of cube or derris 
powder (4 percent rotenone) at the rate of 4 pounds per 100 gallons 
o r v^ater plus 4 pounds of rosin-residue emulsion. The spr^y acts 
as a contact poison and as a repellent. The effective period is 3 
days to 2 weeks, and one spraying befor- 1^^-ae were more than tro- 
th irds gro'wti gave good kill. These results are referred to by the 
Few Jersey Agricultural Experiment Station ( 294- ) in 1938. 
"7. J. haude in 1939 in advertising literature published by John 
Powell and Co., Few York, N. Y., recommended cube or derris spray, 
4 pounds of ponder of 4 percent rotenone content plus 4 pounds of 
rosin-residue emulsion per 100 gallons, for the control of c^nkerworms. 
'Gncilariidae 
Phyllonorycter \ n. sp. 
The United States. Department of Agriculture, Puerto Rico Experi- 
ment Station ( 451 ), in 1940 reported th^t early in January 1939 the 
leaflets of a number of petted insecticidal plants of Tephrosia 
toxicaria and T_. vogelii were attacked by the lsrv*»e of a small moth, 
which caused them to drop prematurely. 
Hesperiidae 
Erionota thrax (L. ) 
Flippance ( 137 ) * n 1920 suggested derris powder for use again-st 
'. the larvae. 
Urbanus proteus (L.) the bean leaf roller 
secup ( 489 ) in 1933 reported tests in <"h.ich leaves '--ere treated 
in the laboratory and larvae introduced. Rotenone dust was effective 
against small larvae but against lar^e larvae cryolite ana 1' 
arsenate dusts were more effective, Rotenone-containirg sprays, 1 
part in 200 parts of w^ter, appeared to be rath sr effective repell- 
ents, as only a small portion of the treated food was eaten. Howev- r, 
when untreated food was added the larvae fed readily and developed 
normally, indicating that the contact v 'ith the rotenone-troated food 
had not been fatal. 
Hyponomeutidae 
Argyresthia coniugella Zell., the ap,-le fruit moth 
Stapley(392) in 1934 described laboratory tests with derris 
agai st the apple fruit miner in nd. T^o batches of re 
lightly dusted over witl a nrrris dust 10 day ber 1 laid. 
The young lnrvae could be se^-.n inside tl • g r s, which were due to 
hatch in 3 or 4 days. About ha] : the er T s hatched but the young 
