16 BULLETIN 1156, U. S. DEPARTMENT OE AGRICULTURE. 
Harvest, Ehnola, Extra Early Sunlight, and White Albino, of the 
Early Michigan group; Spaulding Rose, of the Rose group; Burbank, 
of the Burbank group; Bountiful, Delaware, Gold Coin, Green 
Mountain, Green Mountain Junior, Idaho Rural, McGregor, McKinley, 
and Norcross, of the Green Mountain group; McCormick, Round 
Pinkeye, and White McCormick, of the Peachblow group; and 
Dakota Red and Keeper, unclassified as to group. 
Most of the varieties of tomatoes tested have proved to be suscep- 
tible to wart, but some of the tests have been inconclusive, and it is not 
yet certain whether different degrees of susceptibility and resistance 
exist in the tomato. In general, the tomato becomes infected less 
readily than the potato, requiring particularly favorable environ- 
mental conditions and appropriate stages of host development. 
A number of solanaceous plants, including the native solanaceous 
weeds of Pennsylvania, and the eggplant, tobacco, petunia, and 
pepper, which are in common cultivation, have been tested for sus- 
ceptibility to the wart pathogen, but infection has thus far failed. 
