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Back (15) in 1932 stated that when rotenone dissolved in acetone is 
applied to fabrics in laboratory tests it imparts a real moth resistance, 
A number of mothproofing solutions' now on the market contain rotenone. 
Campbell (60) in 1S32 critically reviewed the tests of rotenone as a 
mothproofing agent by Back and Cotton and by Moore. These tests gave the 
clearest evidence of a repellent or deterrent effect. V',hen the larvae 
were placed in a petri dish containing a half circle of cloth treated with 
rotenone and an untreated half circle, they at first distributed them- 
selves over both pieces. Later most of them were found on the untreated 
piece. Back does not consider rotenone repellent, because the initial 
distribution of the larvae was uniform. Moore writes that rotenone has a 
very strong repellent effect, because all the larvae fed on the untreated 
side. He says there is some doubt about its toxicity to the larvae. 
Yihether the effect is repellent or deterrent, it is certain that rotenone 
drives the larvae away to the untreated cloth, where they feed normally. 
With the exception of tho case just mentioned, Campbell does not believe 
that a repellent or deterrent effect of rotenone has been convincingly 
demonstrated. . 
Musser ( 286 ) in 1936 included rotenone solutions- among the most effec- 
tive mothproofing solutions available. 
McTavish ( 265 ) discussing mothproofing problems in New York in 1937, 
said that frequently vegetable insecticides are dissolved in hydrocarbons, 
the favorites being pyrethrum extract, cube, and derris root. These tend 
to prolong the larvicidal action after the solvent has evaporated. Un- 
fortunately deterioration of these natural insecticides under ordinary 
atmospheric conditions is relatively rapid. 
Takei and Tada ( 399 ) in 1937 in discussing the use of insecticides 
against insect pests of woolen goods, said that pyrethrum and rotenone 
are both effective, but the latter at the rate of 3 parts to 1,000 by 
weight of material is preferable for preventing infestation because the 
former evaporates more quickly. 
Tortricidae 
Adoxophyes pri vatana (Walk. ) 
Nawa (289) in 1936 reported that the eggs of this species ontea in 
Japan can be destroyed by spraying with derris and soap. 
Archips fosterian a (F. ) 
An anonymous writer (5) in 1937, discussing the control of insects in 
the Netherlands rath derris, stated that a concentration of 0.75 percent 
of rotenone suffices for control of (Tortrix) Arc hi ps fostcriana . 
