- 398 - 
In the modified spray program a pint of nicotine sulphate was 
used in the petal fall, and first and second cover sprays. 
SMITH, R. H., MEYER, H. U. , and PERSING, CO. (1703) 
1934. NICOTINE VAPOR IN CODLING MOTH CONTROL. Jour. Econ. Ent . 27: 
1192-1195, illus. 
A nicofumer and a portable famatorium are described and illus- 
trated. The former is a device for utilizing nicotine in the form of 
vapor or finely atomized mist in the control of insect pests. The latter 
is used to control the codling moth with nicotine vapor, and all the 
moths in a tree 24 ft. high and 24 ft. wide may "be killed with a dosage 
of 10 cc. of Black Leaf 50. The rate of treatment is one tree per minute, 
In preliminary tests codling moths subjected for only 2 or 3 sec. to a 
blast of concentrated nicotine vapor were paralyzed and died. . 
STEARNS, L.- A. (1704) 
1934. THE PROBLEM OP CODLING MOTH CONTROL IN DELAWARE. Jour. Scon. Ent. 
27: 225-229. 
Recent experimental evidence suggests more effective second 
brood control by using a series of 3 nicotine-oil sprays to be applied 
early in July, late in July, and early in August (p. 228) . 
STEARNS, L. A., MACCREARY, D., and HADSN, ft. R. (1705) 
1934. EXPERIENCE, DURING 1933, TILTH ARSENICALS AND ARSENICAL SUBSTITUTES 
APPLIED ON APPLE POR CONTROL OP CODLING MOTH. Peninsula Hort. Soc . 
[Del.] Trans. 1933, pp. 20-28. [Abstract in Rev. Appl. Ent. (a) 22: 
298. 1934.] 
The most effective schedule consisted of 3 cover sprays of 4 
lb. lead arsenate, 10 lb. flotation sulphur, end 5 lb. hydrated lime in 
100 gal. water with the addition of fish oil in the first and second 
(l pt . and 1 qt . respectively) , against the first brood, and 3 of 1 pt. 
nicotine sulphate, 1 gal. oil and. 3 lb. hydrated lime in 100 gal. bor- 
deaux mixture against the second brood. Nicotine tannate was not 
satisfactory. 
TCAKSLAND, C, and HAEGELE, R. IT. (1706) 
1934. CODLING MOTH CONTROL IN IDAHO. Idaho Agr. Expt . Sta. Bull. 200, 
26 pp., illus. [Abstract in Expt. Sta. Rec . 71: 511-512, 1934.] 
* 
The use of Black Leaf 40, 2/3 pt., and oil emulsion, 1 gal. to 
100 gal. of dilute spray, is about equally as effective as lead arsenate, 
and this combination may be substituted for lead arsenate if desired. 
