1182 



MANUAL OF DETERMINATIVE BACTERIOLOGY 



446). From New Latin Solanum, gen- 

 eric name of potato. 



Common name : Potato-calico strain of 

 alfalfa-mosaic virus. Differing from the 

 type by inducing a more severe disease in 

 potato, in which it is commonly found in 

 nature. (Price and Black, Phytopath., 

 30, 1940, 444-447 ; Dykstra, ibid., 29, 1939, 

 917-933; Porter, Potato Assoc. Amer. 

 Proc, 18, 1931, 65-69; Hilgardia, 6, 1931, 

 277-294; 9, 1935, 383-394.) 



22. Marmor tulipae H. {loc. cit., 52). 

 From New Latin Tulipa, generic name of 

 tulip. 



Common name : Tulip color-adding 

 virus. 



Hosts : LILIACEAE — Tulipa gesneri- 

 ana L., garden tulip; T. eichleri Regel ; 

 T. greigi Regel. 



Insusceptible species: AMARYLLI- 

 DACEAE — Narcissus sp., narcissus. 

 IRIDACEAE — Iris germanica L., iris. 

 LILIACEAE — Allium cepa L., onion. 

 SOLAN ACEAE — Nicotiana tabacum L., 

 tobacco. 



Geographical distribution : Wherever 

 hybrid tulips are grown. 



Induced disease : In tulip, no obvious 

 effect on leaves but dark striping of flower 

 by pigment intensification. Little inter- 

 ference with growth of plant. No intra- 

 cellular bodies. 



Transmission : B}' hypodermic injec- 

 tions of expressed juice in dilutions to 

 10~*. By aphids, Myzus persicae (Sulz . ) , 

 Macrosiphum solanijolii Ashm. (= M. 

 gei Koch, Illinoia solanijolii Ashin.), 

 Aphis (= Anuraphis) tulipae B. de 

 Fonsc. (on bulbs), and perhaps Macrosi- 

 phum pelargonii Kalt. (APHIDIDAE). 

 Not through seeds from diseased plants. 



Thermal inactivation : At 65 to 70° C in 

 10 minutes. 



Literature : Hughes, Ann. Appl. Biol., 

 18, 1931, 16-29; 21, 1934, 112-119; Mc- 

 Whorter, Phytopath., 22, 1932, 998 

 (Abst.); 25, 1935, 898 (Abst.); Ann. 

 Appl. Biol., 25, 1938, 254-270. 



23. Marmor mite H. (loc. cit., 53). 

 From Latin rnitis, mild. 



Common name : Lily latent-mosaic 

 virus. 



Hosts : LILIACEAE — Lilium amabile; 

 L. auratum Lindl.; L. canadense L.; L. 

 candidum L.; L. cernuum; L. chalcedoni- 

 ciim L. ; L. croceum Chaix. ; L. davmottiae; 

 L. elegans Thunb.; L. formosanum 

 Stapf.; L. giganteum; L. henryi Baker; L. 

 leucanthum; L. longiflorum Thunb.; L. 

 myriophyllum; L. pumilum; L. regale 

 Wils.; L. sargentiae Wils.; L. speciosum 

 Thunb.; L. superbum L.; L. testaceum 

 Lindl.; L. tigrinum Ker; L. umbellatum 

 Hort. ; L. wallacei; Tulipa gesneriana L., 

 garden tulip; T. clusiana Vent.; T. lini- 

 folia Regel. 



Insusceptible species : LILIACEAE — - 

 Allium cepa L., onion; Lilium hansoni 

 Leichtl. IRIDACEAE — Iris germanica 

 L., iris. SOLAN ACEAE — Nicotiana ta- 

 bacum L., tobacco. 



Geographical distribution : Wherever 

 lilies and tulips are cultivated. 



Induced disease : In Easter lily, masked 

 symptoms or systemic chlorotic mottling, 

 in either case without necrotic flecking. 

 In tulip, systemic chlorotic mottling in 

 foliage and flower "breaking" (color re- 

 moval, except in a few varieties in which 

 color intensification occurs instead) . In- 

 tracellular bodies characterize ijivaded 

 tissues. 



Transmission : By inoculation of ex- 

 pressed juice (rubbing surface of leaves), 

 in both lily and tulip. By plugging and 

 grafting of dormant bulbs of tulip. By 

 aphids, Myzus persicae (Sulz.), Macro- 

 siphum solanifolii Ashm. (= M. gei 

 Koch), and Aphis (= Anuraphis) tulipae 

 B. de Fonsc. (APHIDIDAE). Not 

 through seeds from mosaic Lilium longi- 

 florum . 



Thermal inactivation: At 65 to 70° C 

 in 10 minutes. 



Literature: Atanasoff, Bull. Soc. Bot. 

 Bulgarie, 2, 1928, 51-60; Brierley, Phyto- 

 path., 29, 1939, 3 (Abst.); 30, 1940, 250- 



