Some Troubles of Wi.^jtek Tomatoes. 223 



The treatmemfc fo(r this disease is to remove the plants and soil, 

 thoiPOTighly wash the benches or boxes with lye, and begin anev^^ 

 But it would be a great saving of time and expense if the soil 

 oould be treated, between the crops, with some material which 

 would destroy the nematodes. This was tried in a small way. 

 Five boxes, each containing four diseased plants, were selected for 

 treatment, December 11, 1891. The plants were removed, and the 

 soil wajs treated as foUows: 



1. One-third pound of concentrated commercial lye dissolved 

 in a pail of water. 



2. Two pounds of salt in a pail of water. 



3. One pound of quick-lime in a pail of water. 



4. Four tablespoonfuls of bisulphide of carbon poured into 

 holes which were quickly closed. 



5. The box removed out of doors and allowed to freeze solid. 

 These boxes are eighteen inches square and contain ten inches 



of son. Clean young plants were set in them after the lapse of 

 four or five days, and the boxes were set side by side in the 

 tomato house. One or two of the plants died in the soil treated 

 with lye, and the places were refilled, while three settings had to 

 be made in No. 2, because of the great amount of salt in the soil. 

 Between each setting the salt was washed out by heavy watering. 

 When the plants were removed six months afterwards it was 

 found that all contained galls except those in boxes 2 and 5 — 

 those salted and frozen — but upon these no galls whatever could 

 be found. The results were definite and satisfactory, but the 

 experiment was too limited to warrant any general conclusions. 

 They inspire the hope that soils can be treated between the crops 



for nematodes. 



Review. 



This bulletin calls attention to three diseases which attack 

 forced tomatoes, at least two of which are serious. One is an 

 obscure blight which appears to be caused by a bacterium, but 

 for which no remedy is known. Removal of diseased plants, and 

 thorough renovation of the house if the disease is serious, are 



