a 
=e 
ceived a small amount of lead arsenate drift in one of the applications 
and that branch was very severely injured. Further proof of this is the 
fact that in the Purdue University plots at Mitchell, Ind., a block was 
Sprayed with lead arsenate in the first brood period and then with nico- 
tine tannate, with serious LT pUL ye 
Effect of nicotine tannate on grape leafhoppers.--G. A. Runner, of 
the Sandusky, Ohio, laboratory, reports that nicotine tannate applied for 
the purpose of controlling the grapeberry moth (Polychrosis viteana Clem. ) 
has resulted in the "almost complete eradication of grape leafhoppers 
(Erythoueura comes Say and related species) of the second brood. The 
nymphs were destroyed and, possibly owing to a repellant effect on adults, 
the treated blocks are now practically free from leafhoppers, whereas ad— 
joining untreated vineyard blocks are very heavily infested." 
JAPANESE BEETLE AND ASIATIC BEETLE RESEARCH 
zastor oil plant poisons Asiatic garden beetle.--"Studies have been 
made," reports H. C. Hallock, Westbury, N. Y., "in regard to the toxicity 
of the castor oil plant to the Asiatic garden beetle. When favored food 
plants are present the beetles will feed on the castor oil plant nearly as 
much as on the favored plants. Beetles that have fed on the castor oil 
plant are paralyzed before they can dig into the ground. Part of the 
beetles recover but this recovery is small when the lower leaves of the 
plant are removed so that the paralyzed beetles are allowed to lie on 
the ground in the direct rays of the sun." 
Fox, of the Moorestown, N. J., laboratory, reports that "Late in the summer 
of 1931 information was received from officials of a bank in Trenton, 
N. J., to the effect that Japanese beetles feeding upon the foliage of 
a small tree, growing in the yard back of the bank building, apparently 
were killed in large numbers as a result of so feeding. * * * The tree 
proved to be the silver—bell tree, Halesia (or Mohrodendron) carolinaL., 
a native of the Southeastern States, but often grown in cultivation in 
the Northern States." 
No tested materials will prevent oviposition by Japanese beetles.—— 
"The oviposition-repellent work (by F. E. Baker, Moorestown) has been com— 
pleted for this season. * * * It was found that colors did not repel 
beetles from or attract beetles to trays of sod or fallow ground for ovipo— 
sition. In addition to colors, various liquid materials were incorpora— 
ted in hydrated lime and dusted on the surface of sod and fallow ground. 
Cresol, Dippel's oil, pine oil, limpid oil, o-chlorophenol, chloronaph— 
thalene, neutral hydrocarbon oil, and kerosene were used in 5 per cent 
dusts. All of these dusts were applied to the surface of the ground at 
the rate of 1,000 pounds per acre. No material used repelled or attrac— 
ted the beetles to the giound for oviposition. Al0O per cent dust of geran— 
