- 479 - 
extracts gave results equally satisfactory against capsid bugs, 
larvae of tortricids and the winter-moth (Ch eimatobia brumata ) . 
The extracts were also tested with gopd results on the apple aphid (Aphis 
pomi ) , apple sucker ( Psylla mali ) , gooseberry aphid ( Aphis grossularia e) , 
and rose aphid ( Aphis rosae ) . 
3UAINTANCE, A. L. , and SIEGLER, E. H. (2066) 
1918. INFOEMATION FOR FRUIT GROUSES ABOUT INSECTICIDES, SPRAYING- APPARATUS 
AMD IMPORTANT INSECT P T - STS. U.. S. Dept. Agr. Farmers' Bull. 
908. 99 pp. , illus. 
This bulletin was -revised in 1920, but without change in the 
section devoted to nicotine. 
The following information was taken from the 1918 edition. 
In the mixture of tobacco fish-oil soap the nicotine content should 
be 0.05 to 0.06 percent (p. 37). Under tobacco or nicotine in- 
secticides the following headings are briefly discussed (pp. 40-42) : 
Commercial nicotine solutions, home-made nicotine sprays, formula 
for making nicotine extract, methods of making nicotine sprays, .and 
tobacco dust. 
A. chart' (p. 73) is given, showing that nicotine can be combined 
with arsenate of lead, arsenate of lime, and paris green; also 
further combined with soap, lime sulphur, or bordeaux mixture; and 
the kinds of fruits and types of insects are indicated. A spray 
dilution table (p. 75) for ready reference is given. 
Nicotine (40-percent nicotine sulphate) is used in control 
.measures against the following insects: apple aphids ( Aphi s 
mali f oliae Fitch, A. pomi De C-eer. , and A. ayenae Fab.) (p. 77), 
apple redbugs ( Heterocordylus malinus Reuter and Lygidea mendax 
Reuter) (p. 79) , pear-tree psylla ( Psylla pyricola Forster) (p. 85) , 
pear thrips ( Taeniothri ps inconsequens Uzel.) (p. 8 6), cherry aphid 
( Myzus cerasi Fab.) (p. 92), plum aphids ( Aphi s setariae Thomas, 
P horodon hunuli Shcrank, and Kyal opt eras arundinis Fab.) (p. 94), 
grape leaf hopper ( Typhlocyba comes Say.) (p. 95), grapevine aphid 
( Microsiphu m illinoiensis Skimer) (p. 98) , and currant aphid ( Myzus 
ribis L. ) (p. 99) . 
BORNE, U. T., and ESSIG-, E. 0. (2067) 
1921. PLANT DISEASE AND PEST CONTROL. Calif. Coll. Agr. Expt. Sta. Circ. 
227, pp. 1-69. 
The following tobacco preparations are briefly described and 
recommended for a wide variety of insects (pp. 62-65). 
Formula 24 Formula 24 b 
Distillate emulsion — 10 gal. Distillate emulsion — 5 gal. 
Black Leaf 40 1 pt. Black Leaf 40 1.5 pt. 
TJater to make 200 gal. I7ater to make 200 -seal. 
