- 497 - 
HORSFaLL, J. L. , and EYER, J. R. (2118) 
1921. PRELIMINARY NOTES ON CONTROL OF MILLIPEDES UHL3R SaSH. Jour. 
Econ. Ent. 14; 269-272. [Abstract in Rev. Appl, Ent. (a) 10: 
44. 1922.] 
The use of Nicotine sulphate 1 part in 200 of water sprinkled or. 
a newly seeded bed resulted in an increase of 224 plants (tomato seedlings, 
carrots and lettuce) over the untreated "beds; 2 percent nicotine sulphate 
as a dust increased the stand by 144 plants. 
ANONYMOUS ' (2119) 
1925. ZOOLOGY AND ENTOMOLOGY. Pa. Agr. Expt. Sta. Ann. Rept. 38 
(1924-1925). Bull. 196, pp. 32-33. [Abstract in Rev. Appl. Ent. 
(A) 13: 634-635. 1925.] 
Various materials — miscible oil, calcium caseinate, skim 
milk powder, and powdered glue — have been tested to see if they 
could replace soap as a spreader in liquid nicotine spray against 
aphids. Without lime, all the materials tested were inferior to 
fish-oil soap, but with the addition of lime they either equalled 
or exceeded the soap standard. Satisfactory remedies against mil- 
lipedes in lettuce cold frames included nicotine sulphate in water, 
(1:500) applied at the rate of 1 gal to 2 l/2 sq. ft. and 2 percent 
home-mixed nicotine dust ./orked into the soil a week before sowing. 
YlTYIviORJ, F. H. (2120) 
1924. THE GARDEN CENTIPEDE, SCUTIGERELLA LuMaCULATa ( NEWPORT) , A 
PEST 01 ECONOMIC IMPORTANCE IN THE WEST. Jour. Econ. Ent. 17: 
520-526. 
Tobacco dust was tried as a repellent in California. It was 
applied at the bases of asparagus plants and covered with dirt. 
It nad no apparent repelling efiect on this centipede (p. 526). 
P. HOW NICOTINE KILLS, REACTIONS, SYMPTOMS, MI NIMUM DOSAGE, ETC., 1900-1934. 
GUERCIO, G. EEL (2121) 
1900. THE KILLING POWER Oi 1 NICOTINE SOLUTIONS dSD ITS USE IN THE 
DESTRUCTION OP INSECTS. Nuove Relaz. R. Staz. Ent. Agr, [Florence] 
1st ser. , No. 3, pp. 124-134. [In Italian.] 
In the laboratory in Italy a. series of tests was conducted with 
silkworms ( Bombyx mori L.) in 1895, 1696, and 1897 by spraying and 
dipping the insects in nicotine solutions ranging from 10 to 0.01 
percent, a 10 percent solution of pure nicotinu paralyzes the 
larvae in less than 1 minute. Solutions from 7 to 3 percent also 
rendered them unablu to walk in a few seconds; they drop on the side 
and bend their body. If treated with 2 to 1 percent solutions they 
raise their heads, tremble, and die in 8 to 10 minutes. In all cases 
death is x-^receded by vomiting and convulsions of the prolegs. 
