ROOT KNOT NEMATODE INFESTATION 91 



(256) Watson, J. R. 



[1929-33.] root-knot investigations. Fla. Agr. Expt. Sta. Ann. Rpts. 

 1928-29: 54; 1931-32: 69-70; 1932-33: 76. 



(257) and Bratley, H. E. 



[1936.] root-knot investigations. Fla. Agr. Expt. Sta. Ann. Rpt. 

 1935-36: 64-65. 



(258) and Goff, C. C. 



1937. control of root-knot in Florida. Fla. Agr. Expt. Sta. Bui. 

 311, 22 pp. 



(259) Goff, C. C., and Bratley, H. E. 



[1937-38.] root-knot investigations. Fla. Agr. Expt. Sta. Ann. Rpts. 

 1936-37: 71; 1937-38: 83. 



(260) Webber, Herbert J., and Orton, W. A. 



1902. a cowpea resistant to root knot (heterodera radicicola). 



U. S. Bur. Plant Indus. Bui. 17: 23-36, illus. 



(261) Weimer, J. L., and Harter, L. L. 



1925. varietal resistance of sweet potatoes to nematodes, hetero- 

 dera RADICICOLA (GREAF.) MULLER, IN CALIFORNIA. Phytopa- 



thologv 15: [423]-426. 



(262) White, R. P. 



1930. NEMATODES AND THE DISEASES THEY CAUSE . . . Florists' Exch. 



74 (15): 25. 



(263) Whittle, W. O., and Drain, Brooks D. 



1935. the root-knot nematode in Tennessee, its prevalence and 



suggestions for control. Tenn. Agr. Expt. Sta. Cir. 54, 

 [8] pp., illus. 



(264) Wilke, S. 



1925. nematodes, fadenwurmer. In Sorauer, Paul, Handbuch der 

 Pflanzenkrankheiten. Aufl. 4, Bd. 4, illus. Berlin. 



(265) Wilson, J. D. 



1936. ROOT-KNOT NEMATODE IN MUCK SOILS WITH REFERENCE TO SOIL 



TEMPERATURE AND VARIOUS TREATMENTS. Ohio Agr. Expt. Sta. 



Bimo. Bui. 21 (178): 21-25. 



(266) Young, P. A. 



1939. TOMATO WILT RESISTANCE AND ITS DECREASE BY HETERODERA 



marioni. Phytopathology 29: 871-879. 



(267) Zimmerley, H. H., and Spencer, Herbert. 



1923. HOT WATER TREATMENT FOR NEMATODE CONTROL. Va. Truck 



Expt. Sta. Bui. 43, pp. [267]-278, illus. 



(268) ZlMMERMANN, A. 



1898-1900. DE NEMATODEN DER KOFFIEWORTELS. DEEL I-II. 's Lands 



Plantentuin Meded. No. 27, 64 pp., illus., 1898; No. 37: 1-23, 

 illus., 1900. 



(269) 



1903. UBER EINIGE AUF DEN PLANTAGEN VON OST- UND WEST-USAMBARA 



gemachte beobachtungen. Deut. Ost Afrika Ber. uber Land 

 u. Forstw. 1: 351-381. 



U. S. GOVERNMENT PRINTING OFFICE: 1941' 



