-8- 
with geraniol and eugenol, is a omer Soa a, substitute for a wick in 
vaporizing attractants, except for the wei of the equipment and 
the fact that thers is no convenient vanivensi iF determining when the 
attractants are exhausted. Cake bait composed cf alcoholic solutions 
of stearic acid and sodium hydroxide combined to form sodium stearate, 
with the attractants added, is as effective as the liquid bait, but 
it-is provesly consumes. too auickly to be of veneral use. Cankeie 
commercial dispensing outfits were not satisfactory in vaporizing 
geraniol and eugenol. Tests with liquid bait, as compared with bran 
bait, confirmed results obtained in 1932, that the former is more ef- 
fective than the latter. Large quantities of beetles cannot be dis— 
posed of by burning, unless special equipment is installed to carry 
off the obnoxious rackae which accompany this process. ‘The consump- 
tion of liguid bait in more than 1,500 traps was less than that pre- 
dicted, largely because of abnormal rainfall. There are still many 
yromising lends dealing with a further improvement of the trap and 
+ 
the bait which have not been fully investigated. 
Treatment of balled and »otted plants to prevent artificial 
dispersion of Jap | beatle.- --Tests were run by J. W. re lioorestown, 
to determine whether or not grubs in an established soil ball wiil 
be xilled when the ball is repotted in a pot of .the next larger size, 
Sine soil containine ee ee for. the shifting. Pots 
a swith muslin and filled with soil in which grubs were 
he soll was packed and watered and kept for 1 day before 
using. These pot bags were then shifted to larger pots, he bag be- 
ing placed adjacent to one side of the pot and poisoned soil filled 
in around it. In shifts from 24-inch to 3-inch, and 3-inch to 4— 
inch pots the chemical was used at the rates of 4, 1, and 2 pounds 
per cubic yard. In 4~inch to 5-inch shifts 1, 2, and 5 rounds of 
chemical »er cubic yerd were used. Results were as follows 



ee a 


Size of pot Dosage per Tine of 
an tances’ Sue. dublogmard exposure Results 
Pounds Lays 
22 tos ? L Quanore Complete kill. 
Do. 1 aPtoed No normal but some 
sick grubs. 
Do, = 3 Incomplete kill. 
Do. s 4 cr § No normal but some 
sick..grubs. 
o- LOA 2 £ or more Complete kill. 
Do. 4+ or 1 1310 Incomplete kill. 
4 to & 5 2 Complete kill. 
Lo A 2 S Do. 
Do, 1 borg Incompiete kill. 

Se See Seat nena Ns ee ee. Si 
