- 382 - 
Nicotine sulphate used alone was not effective, "but a combination 
of nicotine sulphate and oil proved as effective as lead arsenate or 
more so. Owing to the high cost of this material and possible injury to 
fruit and trees, this combination is not recommended for more than 2 
or 3 treatments, which should be made when most of the eggs of the 
first and second broods are being laid. 
(1637) 
1929. SPRAYING EXPERIMENTS POR CODLING MOTH CONTROL. T7ash. Dept. Agr. 
Expt. Sta. Bull. 232, 70pp., illus. [Abstract in Rev. Appl. Ent. 
(A) 18: 273-275. 1930.] 
Nicotine sulphate acts as an ovicide and larvicide, but soon loses 
its insecticidal value and cannot be used alone unless applied at 
frequent intervals. The addition of 1 lb. aluminum sulphate to 100 
gal. nicotine sulphate (1:800) prolonged its insecticidal value, 
but produced russeting or blotching. Nicotine oleate wasnot so ef- 
fective as nicotine sulphate. A combination of oil and nicotine proved 
equcl to or better than the standard lead arsenate- spray in four tests. 
This spray, which is also effective against mites, leafhoppcrs, and 
aphids, may therefore be used as a substitute. for some of the lead 
arsenate sprays. 
TJAKELAND, C (1638) 
1929. SOME RESULTS PROM OIL EMULSION SPRAYS POR CODLING MOTH CONTROL 
IN 1927 AND 1923. Idaho Hort. Assoc. Proc. 34th Ann. Meeting, pp. 
54-77. [Abstract in Rev. Appl. Ent. (A) 17: 710. 1929.] 
Certain combinations of oil and lead arsenate or of oil, 
nicotine sulphate, and lead arsenate were more effective in con- 
trolling the codling moth than lead arsenate alone, but were more 
expensive. Oil or oil and nicotine also reduce infestation by 
certain other insects and may sometimes be added with advantage to 
one or more of the codling moth treatments on this account. 
BRIGHT, T7. H. (1639) 
1929. THE DOLLAR SIGN IN T7ALNUT PEST CONTROL. Calif. Dept. Agr. 
Monthly Bull. 18 (4): 273-282, illus. [Abstract in Rev. Appl. Ent. 
(A) 17: 519. 1929.] 
In regard to the codling moth and aphids on walnuts, both pests 
may be controlled by a spray of 15 lb. basic lead arsenate, 1 pt. 40- 
percent nicotine sulphate, 3 lb. spreader to 300 gal. water, If aphids 
occur alone, nicotine dust may be used. 
ALLMAN, S. L. (1640) 
1930. CODLING MOTH EXPERIMENTS, 1929-30. SUMMARY OP RESULTS OBTAINED A 
BATHURST EXPERIMENT FARM. Agr. Gaz. N. S. bales' 41 (ll): 834-844. 
[Abstract in Rev. Appl. Ent. (A) 19: 194-195. 1931.] 
