-57- 
Grapholit ha funebrana Tr. 
Bovey (43) in 195S reported that in tests made in Germany, derris 
dusts containing from 0,8 to 1.0 percent of rotenone did not give as good 
results against this insect as did nicotine sprays, which gave controls 
ranging from 75 to 96 percent at a nicotine concentration of from 0.9 to 
2.2 percent. 
Grapholitha molesta (Busck. ), the oriental fruit moth 
Driggers ( 101 ) in 1929 made laboratory tests to determine the toxicit 
of sprays to the eggs. An alcoholic extract of cube root at 1:200 gave a 
control of 4.1 percent; at 1:500, a control of -0.9 percent; and at 1:1,00' 
a control of 1.1 percent. Derrisol 1:800 plus rosin-fish-oil soap, 1 poun 
to 50 gallons, gave a control of 6,3 percent as computed by Abbot's formuli 
The greatest control, 85.2 percent, was given by Volck at a strength of 
1.25 percent. 
Lipp ( 251 ) in 1929 reported that derris compound 1:500 seemed to have 
no repellent action against this insect, 
Garman ( 150 ) in 1930 reported that in Connecticut peach shoots sprayec 
With rotenone 0,075 or 0,1 gm. in 100 cc. of water to which 1 or 2 gm. of 
sirup or honey had been added were placed in cages containing the moths. 
On the treated peach shoots 854 eggs were deposited, as compared with 
2,217 on untreated shoots. White-oil emulsion 1.3 gm., derris preparation 
1 gm. , and water to 500 cc. killed 60 percent of the eggs; white-oil emul- 
sion 1.6 gm,, derris preparation 1 gm., and water to 600 cc, killed 68 
percent of the eggs; and white-oil emulsion 1.3 gm. , rotenone 1:12,000 
(0,5 cc. of a 10 percent solution in acetone), and water to 600 cc. killed 
73 percent of the eggs sprayed with the mixture. Rotenone 1:1,000 (1 cc. 
of a 10-pcrcent solution in acotone), sirup 2 gm. , and water to 100 cc, 
when sprayed on the eggs gave a probable efficiency of about 93 percent, 
on account of larval mortality after hatching. Wo insecticide gave suf- 
ficient control to warrant recommending it. 
Rotenone in oil emulsified in water with powdered milk (rotenone 
1:25,000; oil 1,0 percent) killed 96.4 percent of the eggs, but the oil 
alone killed 92.9 percent. -- Turner (418.) in 1932. 
The Ohio Agricultural Experiment Station ( 515 ) in 1934 reported 
that combinations of oil with rotenone were among the materials that gave 
best results in orchard tests. Six applications at weekly intervals re- 
duced injury 36.1 percent. Had the first application been made 2 weeks 
earlier better control might have been obtained. 
Chandler and Flint (69) in 1936 published an account of tests of oil 
dusts (35 parts sulfur, 25 parts talc, 25 parts lime, 10 parts lead arse- 
nate, and 5 parts oil) against oriental fruit moth in southern Illinois. 
The addition of derris in place of load arsenate to these oil dusts did 
not increase their effectiveness. The same authors (70) in 1938 reported 
bhat in Illinois in 1936 a proprietary dust containing~~oil , sulfur, and 
ale with lime, in the proportion of 5:57:38, gave 96 percent control and 
