NOTES AND ABSTRACTS. 



301 



TarO Root-rot. By T. F. Sedgwick (Hawaii Exp. Stn., Bull. 2, 1902 ; 

 2 plates). — This bulletin gives a history of Taro (Colocasia antiquorum 

 csculenta), with some account of the general mode of culture. The rot 

 causes in some localities the loss of half the crop. It is due either to 

 adverse soil conditions or to a fungus. The remedy suggested is improved 

 cultivation, as it is found that when this is carried out in the best way 

 the disease does not attack the plants. — F. J. C. 



Tea Rose * Souvenir de Pierre Notting-.' By Ch. Pynaert (Bev. 

 Hort. Beige, xxviii. No. 5, p. 108 ; coloured plate). — A beautiful flower of 

 a salmon tint, originating with and issued by MM. Soupert et Notting of 

 Luxembourg. It is a cross between ' Marechal Niel ' and ' Maman Cochet.' 



G. H. 



Tetratheca ericifolia, Smith. By E. Bedinghaus {Rev. Hort. 

 Beige, xxviii. No. 6, p. 121 ; col.pl.). — It is a plant with Heath-like foliage 

 and dense spikes of reddish-lilac flowers. — G. H. 



Tigridia (Journ. Hort. April 9, 1903, p. 317). — A life-size portrait 

 of these gorgeous and old-fashioned flowers is given. They have a short- 

 lived beauty and require almost annual renewing. — C. W. D. 



Tobacco, Mosaic Disease of. By D. Iwanowski (Warsaw) (Zeit. f. 

 Pflanz. xiii. pp. 1-41, 3 plates ; 1903). — The symptoms are greenish- 

 yellow irregular spots on leaves of cultivated Tobacco, and more or less 

 distortion of the plant. The disease has already been investigated 

 several times, but its cause has not been quite cleared up. The author 

 shows that it can be transmitted by infection and is caused by a bacterial 

 organism, the life-history of which is to be investigated and described in 

 a future paper. The coloured plates give a good idea of the appearance 

 of the leaves when attacked, also the appearance of the bacterial colonies 

 in the plant and on culture-plates. — W. G. S. 



Tomato. By E. J. Kyle and E. C. Green (U.S.A. Exp. Stn. Texas, 

 Bull. 65, 1/1903 ; 6 figs.). — A complete account of the raising of Tomatos, 

 with notes on their diseases and the different methods of marketing. 



F. J. C. 



Tomato, Sleeping Disease Of. By George Abbey (Garden, No. 1643, 

 p. 337 ; 16/5/03). — Sleeping disease of Tomato was first recorded from 

 the Channel Islands. It is very destructive in Guernsey. In recent years 

 it has occurred all over the British Islands. 



The plants first give indications of attack by the dull or leaden colour 

 of the foliage, and presently the leaves begin to droop. Shortly after- 

 wards the stem collapses, especially at the lower part, and the plant gees 

 off altogether. Sometimes, however, it makes a great effort to supply 

 itself with nourishment by pushing adventitious roots from the stem 

 a^ove ground, and in some instances a surface dressing of soil placed 

 round the stem has resulted in the maturing of the fruit already set and 

 ■swelling on the plant. The attack is more frequent after fruit is 

 present than before, though the parasite assails the seedlings, and in all 



