196 Diseases of Greenhouse Crops 



tigations by Warren and Voorhees"^ have shown that 

 tomato varieties such as Lester Prolific, Elongated 

 Sparks, Earliana and Station Yellow recover from 

 the first fumigation with almost no injury. Under 

 the same treatment. Eclipse and Fragmore's Selected 

 suffer lightly, while Stone, Lorillard, Beauty, Per- 

 fection, and Best of All become seriously injured. 

 Tomato plants injured by night fumigation usually 

 show no ill effect until about four o'clock the follow-* 

 ing day, when they wilt. If lightly injured the tops 

 usually die. Fumigation for fifteen minutes with 

 potassium cyanide, one ounce to each 1,000 cubic 

 feet of glass, during the dark is 'satisfactory for 

 indoor tomatoes. The house at that time should be 

 cool and dry (fig. 39, a-c). 



•Warren, G. F., and Voorhees, J. A., New Jersey Agr. Expt 

 Sta. Twenty-seventh Ann. Rept.: 242-246, 1906. 



