33 



Ammonium sulfate, Potassium ciiloride, cyanide, sulfate, and sul- 

 fide, Nitrate of Soda, Sulfate of Zinc, Lye, Hyposulfite of Soda, 

 Carnallit, Potassium sulfocarbonate and xanthogenate, Sulfate 

 of Iron, Unleached Ashes, Carbolic Acid, Gasoline, Naptholine, 

 Kerosene Emulsion, Arsenates, Muriate of Potash, Sodium chloride, 

 Sodium sulfocarbonate and xanthogenate. Sulfur, and Calcium 

 sulfate. Neal, (1. c.) who employed a large number of chemicals, 

 obtained negative results with almost everything. He found, how- 

 ever, that the alkaline solutions gave more encouraging results than 

 any other and tobacco dust mixed with Kainit also worked well. 



Professor Kiihn who has worked upon the problem of nematode 

 control for many years has experimented with a great variet}- of 

 chemicals of different strengths. He found no chemicals, however, 

 that would control nematodes, although the use of some has shown 

 partial benefits. 



Ammoniacal liquor from gas works was recommended by Villet' 

 who claimed that it destroyed nematodes and acted as a fertilizer at 

 the same time. 



Lye was recommended by Comstock" as a wash for greenhouse 

 benches before renewing the soil. 



Watering rose plants affected with galls with a solution of lime 

 water or soda was advocated by May'*, although he subsequently 

 found that even when Nitrate of Soda was applied as strong as i oz. 

 to 4 gals, of water (1-500) it failed to kill nematodes. 



Bailey^ tried concentrated commercial lye, common salt, lime and 

 Carbon bisulfide on pots of infested soil in which tomatoes were 

 planted. These experiments were upon a small scale and while 

 he obtained galls on all of the plants except the one which was 

 treated with salt at the rate of 2 lbs. to a pail of water he does not 

 consider them conclusive. 



Halsted^ calls attention to the use of lime either by sprinkling it 

 upon the soil or by plowing it in. 



Selby (1. c.) experimented with potash salts such as Muriate of 

 Potash and Kainit and also Manganese sulfate. Potassium perman- 



1. Rev. Scient. ser. 4, 1895. No. i, p. 27. 



2. Garden and Florist, Vol. III., p. 59. 



3. American Florist, i8g6, p. 649, also 1S97, PP- 77o-77i. 



4. Bulletin 43. Cornell University, Agr'l Exp. Station, lE 



5. New Jersey Agr'l Exp. Station Report, 1892, p. 384. 



