26 BULLETIN 278, U. S. DEPARTMENT OF AGRICULTURE. 
Table XV. — Aphis pomi, contact insecticide experiments. 
[Benton Harbor, Mich., 1914.] 
Name and dilution. 
Per cent of aphides killed. 
Testl, 
Aug. 20, 
p. m. 
Test 2, 
Aug. 21 
a. m. 
Test 3, 
Aug. 21, 
p. m. 
Test 4, 
Sept. 
17. 
Nicotine sulphate (Com. No. 1), 40 per cent, 1-800 
Nicotine sulphate (Com. No. 1), 40 per cent, 1-800+laundry soap, 
3-50 .'. 
Nicotine sulphate (Com. No. 1), 40 per cent, 1-1,200+laundry soap, 
3-50 
Nicotine sulphate (Com. No. 1), 40 per cent, 1-1,600+laundry soap, 
3-50 
Nicotine sulphate (Com. No. 1), 40 per cent, 1-2,000+ laundry soap, 
3-50 
Nicotine sulphate (Com. No. 1), 40 per cent, 1-800+ arsenate of lead 
paste, 2-50 
Nicotine sulphate (Com. No. 1), 40 per cent, 1-800+ arsenate of lead 
paste, 2-50+laundry soap, 3-50 
Nicotine sulphate (Com. No. 2), 40 per cent, 1-800. 
100 
100 
100 
Nicotine sulphate (Com. No. 2), 40 per cent, 1-800+ arsenate of lead 
paste, 2-50 
Nicotine sulphate (Com. No. 2), 40 per cent, 1-800+laundry soap, 
3-50. 
Nicotine sulphate (Com. No. 2), 40 per cent, 1-800+laundry soap, 
3-50+arsenate of lead paste, 2-50 
Kerosene emulsion (66 per cent stock), 1 per cent 
Kerosene emulsion (66 per cent stock), 3 per cent 
Kerosene emulsion (66 per cent stock), 5 per cent 
Kerosene emulsion (66 per cent stock), 10 per cent 
Kerosene emulsion (66 per cent stock), 10 per cent+arsenate of 
lead paste, 2-50 
Kerosene emulsion (66 per cent stock), 10 per cent+arsenate of 
lead paste, 2-50 
Kerosene emulsion (66 per cent stock), 10 per cent+arsenate of 
calcium, commercial paste, 2-50 
Kerosene emulsion (66 per cent stock), 10 per cent+arsenate of 
calcium, commercial paste, 2-50 
Anthracene emulsion (66 per cent stock), 5 per cent 
Anthracene emulsion (50 per cent stock), 3 per cent 
Anthracene emulsion (50 per cent stock), 1 per cent 
Laundry soap, 3-50 
Laundry soap, 5-50 
Nicotine sulphate (Com. No. 1), 40 per cent, 1-800+ arsenate of 
lead paste, 2-50+lime-sulphur, l§-50 
Nicotine sulphate (Com. No. 2), 40 per cent, 1-800+ arsenate of 
lead paste, 2-50+lime-sulphur, 1^-50 
Arsenate of lead paste, 2-50 
Naphtha soap, 3-50 
Naphtha soap, 5-50 
Kerosene emulsion (50 per cent stock— made with naphtha soap, 
cold water), 10 per cent 
Kerosene emulsion (50 percent stock — made with naphtha soap, 
cold water), 5 per cent 
Kerosene emulsion (naphtha soap, cold water), 10 per cent 
Anthracene emulsion (50 per cent stock — made with naphtha soap, 
cold water), 3 per cent 
Anthracene emulsion (50 per cent stock — made with naphtha soap, 
cold water), 1 per cent 
Fish-oil soap, 3-50 
Fish-oil soap, 5-50 
Nicotine sulphate (Com. No. 2), 40 per cent, 1-1,200+laundry soap, 
3-50 
Nicotine sulphate (Com. No. 2), 40 per cent, 1-1,600+laundry soap, 
3-50 
Nicotine sulphate (Com. No. 2), 40 per cent, 1-2,000+laundry soap, 
3-50 
Check (unsprayed) 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 i 
295 
100 
100 
100 
100 

100 
100 
100 
100 
3 100 
100 
100 
&10 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 

1 Stood combined several days before usage. 
2 A few adults not killed. 
3 Foliage severely burned. 
4 Adult aphides not killed. 
5 No adult aphides killed. 
As will be noted in Table XV, the majority of the materials proved 
effective aphidicides. Thus it will be seen that several combinations 
may be used with good effect when it is aimed to control both chew- 
