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| 'Stroying fruit-moth larvae cocooned therein, while in the cleanly cul- 
tivated orchards evidence of such predatory work was lacking. * * * 
mene is, of course, probable that the weedy orchards provided shelter 
for cocoontng larvae, thus reducing the numbers coming to the tree 
trunks to cocoon in trap bands, but the activity of predators (presum- 
ably field mice) is indicated in other. experiments not thus limited, 
In the eight lots of 50 cocoons each, exposed at intervals between Sep-— 
tember 20 and October 29, half in a weedy orchard and half in a clean 
One, no destruction of cocoons or evidence of mice occurred in the 
clean orchard, while such destruction in the weedy orchards * * * averaged 
o8 per cent * * *,. These preliminary observations indicate the proba— 
bility of valuable clean-up work by predators under certain conditions." 
Influence of light. temperature, and wind on fruit-moth adults.— 
L, F. Steiner, of Cornelia, Ga., summarizes the observations on the beha~ 
wior of adults of the oriental fruit moth as follows: "Light intensity 
appears to be the most important factor regulating adult activity, with 
the optimum condition occurring during the hour after sunset * * * and 
at dawn. During these two periods 75 per cent of the captures are usu- 
ally made. Certain unfavorable meteorological conditions, if they occur 
during these two periods, can thus practically prevent activity over the 
full 24-hour day. These may be either high wind velocities of 8 or 10 
Miles or more per hour, rain, or temperatures below 60° F. Complete 
darkness will prevent activity and so will bright sunlight, with a few 
unexplainable exceptions. Except on warm, cloudy days or bright moon- 
light nights, bait traps have a very short period each day in which to 
function. Their time is shortened still further during April and May, 
when low morning temperatures may prevent morning activity. A highly 
efficient bait must, therefore, be present at all times if the moths are 
to be captured * * * before the urge to oviposit delays their response 
to the traps. The prevention of activity by weather conditions other 
than low temperatures is likely to force an accumulation of fully devel- 
Oped eggs in the females, with the result that a part of the eggs may be 
deposited before the moths react to the bait." 
The hog plum in Panama.--The hog plum is the preferred host plant 
of the fruit fly Anastrepha fraterculus Wied. The following notes are 
culled from the October report of James Zetek, of the Canal Zone station: 
"The hog plum is the abundant fruit at this time and its fruit season 
lasts several months. Some trees still have small fruits * * *, When 
the fruit drops to the ground, if unbroken, and if it receives the full 
effect of the sun's rays, the larvae inside become cooked. * * * We placed 
various vegetables and fruits in cages with A. fraterculus adults and cb— 
tained oviposition in tomato, sweetpotato, and an elongated squashlike 
cucumber grown by the Chinese. A. fraterculus tried to oviposit on the 
egeplant, but the skin was too slippery. * * * We were unable to get 
cviposition in oranges. The adults tried hard enough, but the eggs did 
not get into the fruit. They either stuck out of the puncture or else 
were laid flat on the fruit." 
