18 



BACTERIAL DISEASES OF PLANTS 



Fig. 10. — Twu yuuiig tomato plants of a sensitive variety nioeulated and 

 wilting on leaf marked A", as a result of needle-pricks introducing the Sumatran 

 strain of Bacternim solanacearum which had been exceedingly virulent but was now 

 losing its power to infect. These plants recovered and are shown in Fig. 11." .^ 



Fro. 11. — Same as Fig. 10, but after 2)2 months. 

 only part of the stem to develop incipient roots was the 

 leaf. Plants 2 feet 6 inches and 2 feet 11 inches high. 



Plants recovered. The 

 base near the inoculated 

 Leaves not reflexed. 



