-?o- 
Material end Solution 
Te 
i i , '. Average 
sts } Flies iEg,e -punctures : wunctures 
'_ ; r>er fly 
Lead arsenate 2 gm./,100 cc. 5 
Natural cryolite 2 gin./ 100 cc. 6 
Derris (ground root) 2 gnu/100 cc. 
"ith skim-milk -ponder 5 
Phenothiezine 2 gnu/ 100 cc, 
T7 ith skim-milk ponder 2 
Checks ( no spray) . ■ . 8 
Number Number 
101 
112 
Number 

1 
118 
45 
170 
530 
Number 
0.0 
'.008 
.06 
.13 
3.11 
Procedure: Urte'riels ^ere diluted ?s indicated and sprayed uniformly 
on green, immature apples, "hich were then hun^ in the cages. Food was 
supplied but the only water provided tos sprinkled daily on the apples. 
All tests were run for 20 deys, after ••'hich they were discontinued end 
the apples ^ere examined v, ith a binocul r r for egg punctures. ' The temper- 
ature ranged from 75° to 78° P. end the relative humidity v?s about 60 
percent. Flies were introduced shortly after emergence. 
The results of field experiments to control the apple maggot at 
Experiment Station Farm, Mount Carmel," T ere as follows: 
Materials 
• Infestation in fruits > Varieties 
Lead arsenate-flotation sulfur 
Lead ar senate-lime . 
Cryolite- flotation sulfur 
'Cryolite- talc 
Derris spray 
Check (no maggot spray) 
Percent 
4.9 
11.8 
8.2 
11.1 
28.1 
71.9 
Hurlburt 
Greening 
M ther, Stark 
Greening 
Greening 
Greening 
Sprays of derris 4 pounds, skim-milk DOvder 1 wound, bentonite 2 
pounds, to 100 gallons of water were apwlied on June 27, July 10, and 
July 25; and s-prays of derris 4 pounds, skim-milk powder 2 pounds, and 
'•'ater 100 gallons were applied on August 14, The derris wonder contained 
4 percent of rotenone. 
Beck^ith and Doehlert (24) in 1937 reported on the control of this 
species in cultivated blueberry fields with t ,-, o nonpoisonous insecticides, 
