REPORT (W IM.AXr I'A'riIOLOC.IS T 



(1. L. Ri:i.iii.H 



Auburn. Ahi.. Doc. l(i, 1!)18. 

 Prof. .1. F. Duggar. Dirc-cloi-. 



.\gricultural I-^xptTiiiicnl Station. 

 Auburn, Ala. 

 Sir: 



I am lierewith submitting a brief statement of the work now 

 in progress in the Department of Phmt Pathology. 



(1) Under tiie Adams fund the citrus-canker project has 

 been continued, the results ()l)taine(l being endxKlied in the 

 following papers: 



Susceptil)iiil\ and resistance to citrus canker of the wild 

 relatives, citrus fruits, and Inbrids of the genus citrus. 

 (Preliminar> paper) .lournal of Agricultural Research 

 XIV, No. !), 337-3.'w (Aug.) 1!)18, pis. 50-."i3. 

 Overwintering of the citrus canker organisms in the outer 

 bark tissues of the hardy citrus hybritls. (with I). C. 

 Neal.) .lournal of .\gricultural Research XIV, No. 11, 

 523-524. (Sept.) IDIS. pi. 58. 

 .\ convenient heating and sterilizing outfit for a Held labo- 

 ratory. (With 1). C. Neal.) Phytopathology VIII, No. 8, 

 43()-438. (xUig.) 1918, 2 figs. 

 Suscejitibilitx and resistance to citrus canker of the wild 

 relatives, citrus fruits, and hybrids, of the genus citrus. 

 (Progress report.) In i)rcparation. 

 Several promising fruits and i)lants suitable for stock which 

 nia\ l)e successfully grown in South Alabama have been found 

 to be (juite resistant to citrus canker. Observations during the 

 winter of 1!)17-1!)18 have shown that the canker organism 

 can, after gaining entranci' into the bark tissues, renuun 

 dormanl ((> niontlis) through the winter and l)i'eak out in a 

 viiident stagt' when conditions are favorable for its develop- 

 ment. 



Some i)rogress has been made on a method for isolating 

 the canker organism from the soil, while the same may be 

 said of a nund)er of e\i)eiMments associated with the life- 

 history of the organism. 



