“as - ee 
Rain protector for moth bait traps.—--In connection with the traps 
referred to above, Mr. Spencer says: "A noteworthy and interesting feat— 
ure of these bait jars is a device suggested by Luther Brown, to protect 
the contents from rain, which ordinarily necessitates refillling and is 
a source of trouble and inconvenience in such work. Pieces of flat 
sheet metal 5 inches square were bent diagonally and were wired 3 inches 
above the mouth of each jar, in roof fashion. In December there were 
a number of showers, totalling about 3 inches of rainfall, but because 
of these roofs over the jars, the fermenting solution did not have to 
be changed, and kept in such good condition that moths were attracted 
even after the solution had been used 30 days. We recommend such pro— 
tection to all workers who have bait-—pan tests to make." 
= eS Se 
Yothers, in charge of the Wenatchee, Wash., field laboratory, reports 
as follows on experiments conducted in cooperation with E. H. Siegler, 
Takoma Park, Md.: "Comparison of automatic 4-inch bands half way around 
apple-tree trunks with 2-inch bands on the opposite side, showed, first, 
that the 4-inch half-—bands averaged 74 (codling moth) larvae per tree, 
as compared with 78 larvae for the 2-inch half—bands-—-showing no advan— 
tage for the two 2-inch bands on account of the extra labor required 
to apply them; second, that both 4-inch and 2-inch half-bands averaged a 
few more larvae on the east side of the tree trunks than on the west 
Side--76 to 72, and 82 to 75 larvae, respectively; third, that both 4— 
inch and 2-inch half bands showed considerably higher average catches 
per tree when placed well up toward the branching scaffold limbs than 
when placed nearer the ground--87.7 to 60.6, and 87.8 to 70.2 larvae, 
respectively; fourth, where two 2-inch half—bands were placed on the 
same side of the trunks with a 2-inch space between them, the lower band 
averaged 89.73 larvae per tree, as compared with 70.2 larvae for the 
top band." 
Codling-moth eggs more suscevtible to oil sprays as they become 
older.--R. F. Sazama, in charge of the Vincennes, Ind., laboratory, sub-— 
mits a detailed report on experiments conducted with ovicides against 
the eggs of the codling moth. All eggs were sprayed with one-half of 1 
per cent oil emulsion. The weather was cool and, as a result, only the 
most advanced eggs reached the red-ring stage by the fourth day. The 
experiment proves "that a newly laid egg is more resistant to oil sprays 
than an older egg, at least up to the red—-ring stage of development." 
A tabulation of the results follows: 
Percentage of hatch 
Age of eggs when sprayed Experiment 27 Experiment 28 
LP Oayy. 77 ei TN Sih aa A 2 41.2 ras Yas: 
SLAY Ripe Sie Ra ge ae een ee 20.8 24.4 
ee Sei Nett en's TOs Ce Pad Pea | 
ae ; ayo Xy eve ARP 18.5 14.4 
Unsprayed eggs WEN fee e Meas. 94.3 - 862g 
