ROOT KNOT NEMATODE INFESTATION 45 



McClintock 1927 (148): Nematodes never found in suspected knots, previ- 

 ous records questioned; woolly aphis causes knots; total absence of knots 

 on apple seedling grown near infested fig. Tennessee. 



Milbrath 1923 (162): Root knot found on several varieties of apple. 

 California. 



Selby 1897 (210, 211) : "Eelworms" were found on apple in connection with 

 crown gall and aphid galls. Ohio. [In his 1910 Handbook Selby (212) 

 described crown gall on apple, "probably Bacterium tumefaciens" 

 without mentioning nematodes. See also Rubus.j 



Tarnani 1898 (225) : Lindemann assumed root knot to be the cause of 

 galls on apple and pear roots in Russia; Tarnani did not find Heterodera 

 marioni, but found other nematodes on the surface of these galls. [Ques- 

 tion: Did Tarnani examine Lindemann's actual specimens? His state- 

 ment is not clear. Lindemann's paper (1896) has not been found.] 



Taubenhaus and Ezekiel 1933 (226) : Losses rarely serious. Texas. 



Tufts and Day 1934 (284) '■ Seedlings, Var. Rainier, not attacked (one small 

 test). [Data in letter, 1939: Var. Delicious free from knots (nursery 

 test, 1 year). J California. 



United States Bureau of Plant Industry 1928: 75 Occasionally collected 

 by nursery inspectors in Utah; very minor. 



: — 1935: 78 Generally distributed in Mississippi. 



1936: 77 Root knot reported from Mississippi and Texas. 



Whittle and Drain 1935 (263) : Not seriously affected, though subject to 

 attack. Tennessee. 



The Mississippi station has records of infestations on apple from six States. 

 G. Minz (research station, Rehovot, Palestine; in letter, 1940) reports infestation 

 on "M. mitis" in Palestine; this name cannot be checked. - 



Mangifera indica, mango. (C) 



No reports whatever have been found for this plant. 

 Manihot esculenta (Jatropha manihot; M. utilissima) , cassava. (N) 



Bessey 1911 (16): Nematodes not abundant and no injury observed. 



Neal 1889 (176): "Slightly affected." Florida. 



Marguerite, see Chrysanthemum and Dianthus. 



Marigold, see Tagetes; figmarigold, see Mesembryanthemum; pot-marigold, see 

 Calendula. 



Matthiola sp., stock. 



Goff 1936 (96) : Infestation and very light in 1 winter test (33 plants), very 

 light to very heavy in a second winter test (25 plants) ; average rating 

 "very lightly infested." Florida. 

 Hostermann 1922 (111): Infestation moderate. Germany (experimental). 

 Taubenhaus and Ezekiel 1933 (226) : Losses rarely serious. Texas. 



Mazzard, see Prunus. 



Medicago arabica, spotted bur-clover. 



Neal 1940 (175a): Bur-clover and Southern Giant bur-clover are resistant; 

 may be used successfully in rotations. Louisiana (?) . 



Smee 1928 (214) '• Infestation very slight. Nyasaland. 



Farmers in Louisiana are said to disagree on the resistance of the bur-clovers 

 named above. Severe infestations have been reported on related species: on 

 [M. hispida, toothed] bur-clover by Gilbert (88, 89) and on M. rigidula, Tifton 

 bur-clover, by A. L. Taylor, of the Division of Nematology, working in Georgia. 



Medicago sativa, alfalfa (lucerne) . (N, S) 



Atkinson 1889 (4) : Insusceptible, so far as observed here. Alabama. 

 Bessey 1911 (16): Nematodes abundant, injury apparently not great. 

 California Nematode Committee 1925: 78 Common or Chilean alfalfa 



infested but profitable. 

 Frank 1896 (69): Preferred host; plant development may be injured. 

 Germany. 



» Linford, Maurice B. plant diseases in utah in 1927. U. S. Bur. Plant Indus., Plant Dis. Rptr. 

 Sup. 59, pp. 65-117, illus. 1928. [Mimeographed.] See p. 105. 



7 « Edson, H. A., Miller, Paul R., and Wood, Jessie I. diseases of plants in the united states in 

 1934. U.S. Bur. Plant Indus., Plant Dis. Rptr. Sup. 90. pp. 1-135, illus. 1935. [Mimeographed.] See p. 42. 



77 Edson, H. A., and Wood, Jessie I. diseases of plants in the united states in 1935. U. S. Bur. 

 Plant Indus., Plant Dis. Rptr. Sup. 96, pp. [114]-289, illus. 1936. [Mimeographed.] See p. 172. 



78 See footnote 6, p. 8. 



