~62 
Among many interesting notes on insecticidal investigations, 
W. E. Fleming, Moorestown, N. J., reports that dusting against the Japan— 
nese beetle with lime and with a 5 per cent cresol dust apparently gave 
almost complete protection to sweet corn. ‘In other words, on a property 
which sustained a loss last year of from 23 to 59 per cent, this year 
under machine dusting the loss will not exceed e per cent. 
Mr. Fleming submits a record of the growth of various ornament— 
al perennials in soils treated with lead arsenate at the rate of 1,500 
pounds per acre. The great majority of these plants (list given) were 
apparently uninjured by the treatment. Others, however, were seriously 
injured or killed. 
Experiments in trapping the Asiatic garden beetle (Aserica cas— 
tanea Arrow) have been continued. Mr. Fleming reports: "The largest 
number of beetles caught in one night in the funnel trap was 8,561. In 
order to compare the relative effectiveness of the funnel trap with the 
baffle trap, the beetles resting on the objects in the lighted areas were 
collected. It was found that 25 per cent of the beetles in the vicinity 
were caught by the baffle trap while 75 per cent of the beetles were 
caught by the funnel trap. * * * The relative attractiveness (of color 
in connection with light) was as follows: white 47 per cent, yellow 16 
per cent, aluminum 15 per cent, green 11 per cent, and red & per cenv. 
* * * The most outstanding features (resulting from the trapping experi- 
ments) are that placing the bait in the baffle increases the efficiency 
of the trap 100 per cent over that of the 'standard' trap. A like result 
was obtained with green traps with white funnels and baffles. The traps 
painted pea green or light green are considerably more effective than 
traps painted olive green or dark green. The data have not besn summar— 
ized with the series of traps involving the use of traps painted green 
and white together with parts of nickel." 
Mr. Fleming also reports: "The experiments to determine a chemi-— 
cal for preventing oviposition of the Japanese beetle in grasslands or in 
fallow lands were continued during August." Of the various substan— 
ces tested, "alpha~naphthol was the only material which tended to prevent 
Oviposition. This chemical did not prevent oviposition entirely and 
proved very destructive to the grass." 
Reporting on parasite work, J. L. King, of the Moorestown, N. J., 
laboratory, says that the colonies of Tiphia popilliavora Rohwer, which 
in 19350 underwent such a reduction in numbers that colonization had to be 
discontinued for the year, have increased again but "are far from being 
aS populous as in 1929. However, in Spite of this setback 4,300 fe-— 
males were taken which were sufficient for the starting of 43 new colony 
centers. * * * The first adults of this species were collected on August 
4, one day earlier than in previous years. * * * In spite of the fact 
that large liberations of T. popilliavora have been made during previous 
years on Long Island, no recoveries have been made of this species 
either at Flushing or Jericho." 
