802 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



stages of growth, but commonly its effects are not pronounced until the 

 flowering and fruiting stages. — E. T. C. 



Tomato, Black Spot on the. By GeDrge Abbey (Garden, No. 

 1645, p. 859; 28 5/03).^More or less present wherever the Tomato is 

 Cultivated is the disease known as 'black spot' or ' black stripe.' It is 

 caused by the parasitic fungus Macrosporium Tomato, but is closely 

 allied to the Potato leaf-curl fungus, M. solani. The fruit is most 

 frequently attacked, but the fungus is also often present on the stem, 

 producing the well-known ' black stripe,' and on the leaves, causing the 

 condition termed 'curl.' 



The fungus has been regarded as a wound-parasite, getting into 

 the tissues of the plant through minute cracks in the cuticle or skin. 

 This is emphasised by the fact that the fruit is usually affected round the 

 st vie, or at the point of insertion of the stem, where minute cracks 

 frequently occur. The fungus, however, appears on any part of the fruit 

 and also on any portion of the stem and leaves. It appears that the 

 chief seats cf disease are where moisture has rested for some time, and 

 the germ -tube of a spore of the fungus being present may either have 

 entered by a minute crack in the cuticular cells or directly pierced the 

 softened cuticle. — E. T. C. 



Tomato : Recherches sur le Glceosporium phomoides, parasite 

 de la Tomate. Par M. F. Gueguen (Bull. Soc. Myc. de Fr. xviii. fasc. 

 iv. 1902, pp. 312-327; with two plates, and figs.). — Commences by 

 showing that Sphceronema Lycopersici, Plow. (Gard. Chron. Nov. 12, 

 1881) is the same species as Glozosporium phomoides, Sacc, which 

 occurs on the pericarp of the fruit of the Tomato, and produces conidia 

 which are oblong-clavate, attenuated below, and rounded above (10-12 

 x 2^-3 fi) with two guttules. This communication further intimates the 

 production of pycnidia, which are larger than the conidia. Chlamydo- 

 spores are also produced at the same time. It is admitted to be difficult 

 to decide whether this Glceosporium is truly a parasite or only a sapro- 

 phyte.— 3/. C. C. 



Transvaal. By R. F, Rand (Joum. Bot. 486, pp. 194-201, 6/1903). 



Further "Wayfaring Notes " by Dr. Rand on plants, mostly new species, 

 sent home by him and described by Mr. Spencer Moore and others, with 

 regard i <pociall) I > the mechanisms for pollination. — G. S. B. 



Transvaal, Gardening- in the. By C. F., Johannesburg (Joum. 

 II rt. March 12, 1903, p. 232). — The conditions under which gardening 

 IB conducted in this new colony are discussed. Rainfall at Pretoria is 

 about twenty-six inches. Natives make fairly good garden labourers. Fruit 

 include!- Pouches, Pours, Apples, Oranges. Drawbacks are hailstorms 

 and Locusts, which utterly destroy all vegetation met in their course. 



C. W. D. 



Trees, The Care of Old. By W. .1. Bean (Garden, No. 1636, p. 211 ; 



98 B 06). The two most potent factors in the destruction of old trees 

 an- t >ini m l fungoid parasites. Nothing is more grievous than to 



