- 471 - 
in order to render it adhesive to the leaves and also to favor the 
release of fumes. Nicotine is "used in sprays against various aphids, 
leaf hoppers and psyllids (pp. 249-300). 
DARTER, IT. (2035) 
1932. COMPARISON OF T01ACC0 DUST WITH OTHER FORMS OF NICOTINE IN CONTROL 
OF YELLOW SPOT DISEASE OF PINEAPPLES. Jour. Econ. Ent. 25 (5): 
1031-1035. [Abstract in Expt. Sta. Rec. 68: 349. 1933.] 
In tests of tobacco dust and 7 other nicotine forms by the 
Hawaiian Pineapple Canners 1 Experiment Station as a control against 
yellow spot, the results obtained clearly indicate the superiority 
of tobacco dust over the other nicotine applications. 
TURNER, N. _ (2035) 
1932. NOTES ON ROTENONE AS AN INSECTICIDE. Jour. Econ. Ent. 25 (6): 
1228-1237, illus. [Abstract in Rev. Appl. Ent. (A) 21: 
76. 1933.] 
Certain experiments in which total cube extract or rotenone 
were used, an d; in some cases compared with 40-percent nicotine 
sulphate, showed rotenone in small amounts to be highly toxic to 
a number of insects, a list of which is given. 
YAGO, M. (2037) 
1933. CHANGES IN THE FAUNA OF INJURIOUS INSECTS IN THE PEAR ORCHARDS. 
Jour. Plant Protect. 20: 27-32. [In Japanese. Abstract in 
Rev. Appl. Ent. (A) 21: 263. 1933.] 
Changes have occurred in the relative prevalence of insect 
pests in pear orchards in Shizuoka. Those that were formerly 
abundant but are now scarce include 11 species, the reduction in 
their numbers being probably due to the recent use of nicotine sul- 
phate and other insecticides. 
FARLEY, A. J. (2038) 
1934. PEACH AND APPLE SPRAYING EXPERIENCES IN NEW JERSEY. Peninsula 
Hort. Soc. [Del.] Trans. 1933, pp. 69-74. [Abstract in Rev. 
Appl. Ent. (A) 22: 299-230. 1934.] 
The difficulty of applying the oil emulsion-cresylic acid spray 
against aphids and lime- sulphur against scab within the relatively 
short delayed dormant period may possibly be avoided by the applica- 
tion of a combination of Coposil, sufficient oil emulsion without 
cresylic acid to give 3 percent actual oil and l/2 - 3/4 pt nicotine 
sulphate in 100 gal. at the late delayed dormant period. This spray 
should be effective against coccids, red mite, aphids, and scab. 
