G04 



STATE BOARD OF AGRICULTURE. 



Peter Henderson & Go. 



Ten plants of each of the varieties listed were grown. Five were in- 

 oculated after the method previously given, five were left as checks. 

 Every inoculated plant developed the disease except the Currant tomato 

 and the Ground Cherry. The Currant tomato, however, is by most sys- 

 tematists classed as a different species, and this relation to a pathogenic 

 fungus is believed by many to be a confirmatory test of a specific entity. 

 The Ground Cherry belongs to another genus (Physalis). This experi- 

 ment was not intended to determine the relative effect of the disease 

 on the plant in the field. There are a number of factors which these 

 results do not recognize ; the ability of the plant to form new leaves, the 

 mechanical structure of the leaves, etc. This experiment, however, does 

 point out that in the common varieties of the tomato, with this partic- 

 ular organism, there is no variety strikingly immune or susceptible to 

 this disease. 



It is believed in various sections of the country that the Globe is a 

 resistant variety — this statement being often seen in horticultural pa- 

 pers. G. Kock (1907) classes certain varieties as resistant, less resistant, 

 and strongly susceptible, as follows : 



Resistant — Wonder of the Market, Up-to-date, Mikado, King Humbert ; 



Less Resistant — Magnum Bonum, Prelude, Ponderosa, Pres. Garfield 

 and Alice Roosevelt; 



Especially Susceptible — Trophy, Ficarazzi. 



The varieties tested appeared neither more or less strongly affected 

 than any other. From investigations carried on, it is found that there 

 is no evidence of a distinction, even in the size of the spots formed 

 among these varieties, provided the spore suspension is applied to the 



