- 568 - 
GRISWOLD, &. H. (2377) 
1927. OBSERVATIONS OK THE BIOLOGY 0? a NE s , GERAHIUL APHID ( IIaCRO SIPHUIvi 
CORNELL I PAT GH . ) Jour, Econ. Eat'. 20: 91-94. [Abstract in 
Rev. Appl. Ent. (a) 15: 254-255. 1927.] 
A 2 percent free nicotine dust kills 90 to 100 percent of the 
aphids. A spray of 1 teaspoonful nicotine sulphate and loz. soap to 
1 gal* may "be used, or the plants may "be dipped in this, 
DUDLEY, J. E. , JR., SEaRLS, E. L. , and WEED, A. (2376) 
1929. P^a APHID INVESTIGATIONS. Trans. 4th Internat. Cong. Ent. 
Ithaca, N. Y. II: 608-521, illus. [Abstract in Eev. Appl. Ent. (A) 
18: 314-315. 1930.] 
The most uniform results against the pea aphid ( iviacrosiphum 
(illinoia) pisi Kalt) were ODtained with a dust containing 8 lb. 
nicotine sulphate, 16 lb. monohydrated copper sulphate s.nd 76 lb. lime. 
The effectiveness of dusting, however, was found to be more dependent 
on weather conditions at the time of and following treatment tnan on 
the strength of materia], or amount per acre. 
SLITH, E. C. (237^) 
1932. THE CONTROL OF THE PEA APHID IN ALFALFA FIELDS WITH SPECIAL 
REFERENCE TO THE CHAIN DRAG. Jour. Econ. Ent. 25 (2): 157-164, 
illus. [Abstract in Eev. Appl. Ent. (A) 20: 409-410. 1932.] 
Hicotine sulphate sprays and dusts failed to give satisfactory 
control of this aphid ( Eacrosiphum (i llinoia ) pisi Kalt.) 
KISLAMD,. J. P. (2580) 
1930. THE LLaCK PECAN APHID ( MYZOCALLIS FIMPEHNELLUS FITCH), kiss. 
State Plant Ed. Quart. Bull. 9 (4): 7-10. 
This aphid can be controlled with, a 2 percent home-made nicotine 
dust, if the dusting is done at the time the aphids appear and the 
entire orcnard is dusted. 
Other aphids ( Lionel li?„ costali s and M. caryae ) were also killed, 
besides the following: 8 coleopterous adults, 16 dipterous adults, 8 
leafhoppers, 2 Ephemerida.e, 4 small moths, 4 hymenopterous adults, and 
3 small spiders. 
PLAKIDaS, A. G. (2381) 
1927. STRAMBSRRY XANTHOSIS (YELLOWS) A NEW INSECT*-30RNE DISEaSE. Jour. 
Agr. Res. 35 (12): 1057-1090, illus. [Abstract in Rev. Appl. Ent. 
(A) 16; 438-439. 1928.] 
The strawberry aphid ( jviyzus fraga ef olii Ckll.) which transmits 
this disease from diseased to healthy plants is very readily killed by 
sprajring or dusting with nicotine. 
