-105- 
Complete control of the gypsy moth with spray applied just before 
hatching of the eggs and after larvae were partly grown was obtained 
by using 5 pounds of DDT in 5 gallons of oil per acre.--Dowden et al. 
(136). 
Notodontidae 
Datana integerrima G. and R., the walnut caterpillar 
An application of Gesarol A-3 dust to a heavily infested pecan tree 
resulted in a complete clean-up 2 days later.— Janes (225 ) • 
Olethreutidae 
Ancylis comptana fragariae (Walsh and Riley), the strawberry leaf roller 
DDT gave better control of this insect than three applications of 
40-percent nicotine sulfate spray, the standard recommended insecticide 
treatment.— Parker (287 ). 
This was one of the most resistant lepidopterous larvae tested. 
In greenhouse tests DDT 16 ounces (powder suspension) per 100 imperial 
gallons of water gave less than 70 percent kill as a stomach poison, DDT 
32 ounces (powder suspension) as a contact spray killed 15 percent, and 
DDT 16 ounces in Velsicol emulsion killed 45 percent by contact. In 
field tests poor results were obtained with a dust containing 3 percent 
of DDT, 0.3 percent of Orvus, and 26.7 percent of talc in pyrophyllite, 
and with a spray of DDT 8 ounces in powder suspension. Four days after 
treatment the mortality was 36 percent for the dust, 16 percent for the 
spray,and 8.9 percent for the check.— Ross (306 ) . 
Carpocapsa pomonella (L.), the codling moth 
In orchard tests DDT at 1 pound per 100 gallons was more effective 
than 3 pounds of lead arsenate. The proportion of stings was greatly re- 
duced. Eggs sprayed with DDT developed normally and hatching was only 
slightly below normal. Some of tne young larvae were killed, but it 
was concluded that DDT alone could not be regarded as an ovicide. Cod- 
ling moths in cages sprayed with DDT were killed, but not so quickly as 
when nicotine is used. To test the residual effect of DDT on the moths, 
cages were sprayed and the insects were put in them later. Residue 2 
to 4 days old was very effective, 12 to 18 days old moderately effective, 
and 26 to 28 days old only slightly effective. To kill the moths it 
was necessary to leave them in the sprayed cages 5 hours or longer. In 
laboratory tests young larvae were affected by DDT residue after crawling 
15 to 30 minutes over the sprayed fruit.— Eough (217 , 218 ) • 
In work with the oodling moth on walnuts at Linden, Calif., the 
effects of one and two applications of sprays containing 5 pounds of 20- 
