94 ESAU 



Crafts, A. S. 1934. Phloem anatomy in two species of Nicotiana, with notes on 



the interspecific graft union. Bot. Gaz. 95:592-608. 

 Currier, H. B., Katherine Esau, and V. I. Cheadle. 1955. Plasmolytic studies 



of phloem. Arner. Jour. Bot. 42:68-81. 

 Esau, Katherine. 1933. Pathologic changes in the anatomy of the sugar beet. 



Beta vulgaris L., affected by curly top. Phytopathology 23:679-712. 

 . 1935. Ontogeny of the phloem in sugar beets affected by the curly-top dis- 

 ease. Amer. Jour. Bot. 22:149-163. 

 . 1938. Some anatomical aspects of plant virus disease problems. Bot. Rev. 



4:548-579. 

 . 1941. Phloem anatomy of tobacco affected with curly top and mosaic. 



Hilgardia 13:437-490. 

 . 1944. Anatomical and cytological studies on beet mosaic. Jour. Agric. Res. 



69:95-117. 

 . 1948a. Anatomic effects of the viruses of Pierce's disease and phony peach. 



Hilgardia 18:423-482. 

 . 1948b. Some anatomical aspects of plant virus disease problems. II. Bot. 



Rev. 14:413-449. 

 Fife, J. M., and V. L. Frampton. 1936. The pH gradient extending from the 



phloem into the parenchyma of the sugar beet and its relation to the feeding 



behavior of Eiitettix tenellus. Jour. Agric. Res. 53:581-593. 

 GiROLAMi, G. 1955. Comparative anatomical effects of the curly-top and aster- 



yeUows viruses on the flax plant. Bot. Gaz. 116:305-322. 

 Houston, B. R., Katherine Esau, and W. B. Hewitt. 1947. The mode of vector 



feeding and the tissues involved in the transmission of Pierce's disease virus in 



grape and alfalfa. Phytopathology 37:247-253. 

 KiJSTER, E. 1925. Pathologische Pflanzenanatomie. 3d ed. Gustav Fischer. Jena. 

 Lackey, C. F. 1953. Attraction of dodder and beet leaf hopper to vascular bundles 



in the sugar beet as affected by curly top. Amer. Jour. Bot. 40:221-225. 

 Lambertz, p. 1954. Untersuchungen iiber das Vorkommen von Plasmodesmen in den 



Epidermisaussenwanden. Planta 44:147-190. 

 Sorauer, p. 1909. Handbuch der Pflanzenkrankheiten. 3d ed. Paul Parey. Berlin. 

 Zech, H. 1952. Untersuchungen iiber den Infektionsvorgang und die Wanderung des 



Tabakmosaikvirus im Pflanzenkbrper. Planta 40:461-514. 



