-49- 
Spulcr, Doraan, and Gillies ( 507 ) in 1932 reported that none of the 
contact sprays, sveh as mineral oil, nicotine sulfate, pyre thrum, end 
rotcnone, have sufficient larvicidal value as a spray when used alone. 
Their chief value is in combination with other mateVials in such a way 
that the resultant spray contains both ovicidal and larvicidcl value. 
Turner ( 418 ) in 1932 reported that tests in controlling this insect 
wore limited, owing to low infestations, hut in general they showed that 
rotenonc is of some value. 
Webster ( 475 ) in 1932 reported that on "blocks of trees in the Wenatchee, 
Wash., experimental orchard sprayed with rotcnone, oil-nicotine, or the oil- 
pyrethrum combination, freedom from red spider injury was conspicuous during 
the past season. He said: "We must still regard the use of rotenone, a: 
the oil-pyrethrum combination as well, as in the experimental stage so far 
as codling moth control is concerned c" 
Jarvis ( 222 ) in 1933 reported on the use of Katakilla with white oil in 
Queensland. Five rows of 5- to 6-year-old apple trees, four trees in each 
row (Jonathan and Vandorpool Red) wore sprayed with nonarsenicais, each 
row receiving a different treatment. Four treatments i:ere given each row, 
the spray being applied with a knapsack spray outfit of 4 gallons' capac- 
ity. Approximately 3/4 to 1 gallon of spray fluid was used for each tree 
per application. For a small tree this was a generous allowance and per- 
mitted a thorough coverage. -In the Katakilla and white-oil mixture, Kate - 
killa was used at 2 pounds to 32 imperial gallons and the white oil at 
1:80. White oil alone was used at 1:64. ITicotine sulfate-white oil 
Katakil la-white oil gave .equally good results and both were slightly 
more efficient than lead arsenate but were much more expensive. However, 
it is possible that the strength of these two sprays might be reduced, 
and three applications be given instead of four. The per r 
.sound fruit obtained by each treatment was as follows: Barium fluosili- 
cate 92.8, lead arsenate 97.3, nicotine sulfate-white oil 98.2, Katakilla- 
white oil 98.1, white oil 97.8. 
List (252) in 1933 discussed the progress made in codling moth control 
during the preceding decade. Petroleum oils as carriers of nicotine, py- 
rethrum, and rotenone must be used cautiously to avoid foliage injury. 
The United States Department of Agriculture, Bureau of Entomol' 
(459 ) reported that Childs in 1934 tested mixtures of cube or derris and 
kaolin 1:3 (rotenone 1 percent) on apples at Hood J 'eg. 
results, compared with those obtained with lead arsen; be, 
Material 
Lead arsenate, 3 pounds per 100 
gallons, 5 applications 
Cube mixture, 10 pounds per 100 
gallons, 10 applications 
: e from wc 
'and stii. 
96.1 
95.5 
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STATE PLANT BOARD 
