IV. THE BROWN ROT OF SOLANACEAE 



Type. — This is a destructive parenchymo-vascular wilt dis- 

 ease of wide distribution on a great variety of plants (Figs. 119 

 to 128. 



It was first described by the writer from the potato, tomato 

 and eggplant in 1896 and subsequently from tobacco (1908), but 



[ 





'f^M^ 



Fig. 119. — Potato attacked by Bacterium solanacearum. From a field near Wash- 

 ington, D. C. 



it occurs also in Physalis and red peppers, and outside of the 

 Solanaceae in species of Urticaceae, Leguminosae, Verbenaceae 

 and Compositae (Honing). Fulton and Winston found it on 

 peanuts in North Carolina (1913). It has been inoculated suc- 

 cessfully into Sesamum (Honing), and it also attacks the nas- 

 turtium (Mary Katherine Bryan, Jour. Agric. Res., Vol. IV, pp. 



12 177 



