U3RARY 
-3- 
Morgan ( 207 ) in 1938 reported that a contact spray consisting 
of 1 pound of derris root (3.5 percent rotenone) and 3 pounds of 
soft soap to 50 imperial gallons of water destroyed the' adults in 
laboratory tests, "but in field practice, using a knapsack pump, it 
was difficult to hit enough flies to give appreciable control. 
Agromyza pusilla Meig. 
F. F. Smith ( 253 ) in 1939 ^rote that this serpentine leaf miner 
on Gerhera jamesoni Bolus, was "being combated by picking and destroy- 
ing the infested leaves, or by spraying by derris or nicotine extracts, 
( Agromyza ) Liriomyza solani Macq. 
A spray of derris powder with soft soap was ineffective in pre- 
venting attack by the tomato leaf miner, " Phytomyza solani (Macq.)," 
according to the Experimental and Research Station, Cheshunt, Herts, 
England (80) , in 1938. [This species is also referred to by English 
authors as " Agromyza ( Liriomyza ) solani . Cf . Rev. Applied Ent. (A) 
25: 668.] 
Fhytomyza ilicis (Curtis), the holly leaf miner 
Langford and Cory ( 168 ) in 1937 reported that sprays containing 
a mixture of 3 pounds of 4 percent rotenone powder and 3 pounds of 
rosin emulsion per 100 gallons of water did not kill the larvae within 
the mines. 
Anthomyiidae 
Atherigona indica Mall. 
The Tanganyika Territory Department of Agriculture ( 270 ) in 1935 
reported that the application of derris preparations gave almost com- 
plete control of the sorghum stem maggot at en economic cost. 
Hylemya antiauua Meig., the onion maggot 
Smith end ¥ads^orth ( 255 ) in 1921 tested insecticides against 
onion flies. Six applications of derris-soot mixture (2 parts soot 
and 1 part derris) at the rate of 1 ounce per square yard gave 60 
percent of clean onions, whereas soot alone gave only 16 percent. 
Brittain (42) in 1925 reported that mature larvae were immersed 
for 5 seconds in a suspension of derris root (3 lb. to 100 imp. gal») 
and then placed upon their food plant. The mortalities from different 
treatments were as follows: 
