- 527 - 
Tests were made with the nicotine-paraffin spray [Rev. Appl. Ent . 
(A) 8: 349] against the pear-midge (Perrisia pyri Bch.). A 2 - percent 
miscible oil spray and 40-percent nicotine sulphate were, used in 
place of the original formula, ^he modified mixture acted well against 
the woolly aphid ( Eriosoma lanigerum Hausm . ) . The addition of nicotine 
sulphate to the oil emulsion "before instead of after dilution threw a 
certain amount of the oil out of suspension resulting in scorching the 
leaves. On some trees a mixture of 6 Id. molasses in 100 gal. water con- 
taining 1 to 1000 nicotine sulphate was used. During October spraying at 
intervals of 3 weeks appeared to keep P. pyri in check hut during November 
weekly spraying was apparently inadequate. 
JACOB SECT, 17. C. (2226) 
1928. REPORT FOR 1927 0? THE BUREAU OP PLANT QUARANTINE AND PEST CONTROL. 
Calif. Dept. Agr. Monthly Bull. 16 (12): 633-677. [Abstract in Rev. 
Appl. Ent. (A) 17: 53-65. 1929.] 
The most effective insecticide against bean thrips ( Heliothrips 
fasciatus Perg. ) was a combination of a light miscible oil with nicotine 
sulphate. 
McDANIEL, E. I. (2227) 
1928. TT70 SPRUCE CHSRMES INESST MICHIGAN SPRUCE. Mich. Agr. Expt. Sta. 
Quart. Bull. 10 (3): 128-131, illus. [Abstract in Rev. Appl. Ent. (A) 
16: 524. 1928.] 
Trees infested with Chermes abietis L. (spruce gall aphid) and 
C. similis Gill should be spraj/ed in the spring before the new growth 
starts with miscible oils 1 to 20, 2-percent oil emulsion, or nicotine 
sulphate (40-percent) at 1 to 800, plus 4 lb. soap to 100 gal. 
REGAN, 17. S. (2223) 
1928 . OIL SPRAYS AND THEIR RELATION TO ORCHARD PEST CONTROL. !7ash. State 
Hort. Assoc. Proc. 23 (1927): 54-71. [Abstract in Rev. Appl. Sat. (A) 
17: 224-225. 1929.] 
Best results against aphids ( Aphi s pomi DeG. and Anuraphi s roseus 
Baker) in curled leaves can be obtained by the use of nicotine or a 
nicotine-oil spray combination; the latter is also of value in the 
control of the woolly aphid ( Sriosoma lanigerum Hausm.). 
TOODHILL, A. R. (2229) 
1928. SPRAYING FOR T700LLY APHIS. THE ADDITION OF MISCIBLE OIL TO SUMMER 
TOBACCO SPRAYS. Agr. Gaz. New S. T7ales 39 (8): 613-614. [Abstract 
in Rev. Appl. Ent. (A) 16: 685. 1928.] 
No advantage is gained by adding small quantities of miscible oil 
to sprays of tobacco and nicotine sulphate against the woolly aphid 
( Eriosoma lanigerum Hausm.), while if more than 2 pt . per 100 gal. is 
added, scorching of the apple foliage may result. 
