Some Tomato Diseases. F. T. Brooks and G. O. Searle. 193 
100-250 « in diameter; pycnospores issuing in coils, through 
the ostiolum, forming a flesh-coloured exudate; hyaline, con- 
tinuous, sometimes faintly bi-guttulate, 3-7-6 x 2-3-5 p 
. (average 6 x 3p), ovate with a tendency to pointed ends, 
produced singly on unbranched conidiophores. Pycnidia ac- 
companied by aerial mycelium bearing spores of the Alternaria 
type produced in chains. Alternaria spores 40-80 pw x 12-18 p, 
multiseptate, dark brown. On green and ripe tomato fruits, 
causing a rot. 
The following diagnosis in Latin has been kindly drawn up " 
by Mr Gepp and Mr Ramsbottom of the British Museum: 
Phoma alternariaceum Brooks and Searle. 
Pycnidiis aggregatis, glabris, brunneis atrisve, subglobosis, 
papillulatis, ostiolatis, poro (interdum poris duobus) pertusis, 
100-250 diam.; sporulis poro erumpentibus et cirrum roseolum 
protrudentibus, hyalinis, continuis, interdum obscure bi-guttu- 
latis, 3-7°5 w X 2-3°5m (plerumque 6p x 3), ovatis utrinque 
subacutis, e sporophoris simplicibus singulariter orientibus. 
Pycnidiis mycelio aerio sporas typi Alternariae catenatis 
gerenti se sociantibus. Sporis Alternariae 40-80 pw x 12-18 p, 
multiseptatis, atrobrunneis. 
In Lycopersici fructibus viridibus maturisque, et pulpam 
putrefaciente. 
In consulting the literature on Alternaria and Phoma, only 
two species of the latter have been found, in the life-cycle of 
which an Alternaria form has been described. These are two 
saprophytic species, Phoma Richardiae and Phoma fictilis men- 
tioned by Miss Westerdijk and Miss van Luijk(16) as having 
been grown by them. Many years ago, Kohl(s) in trying to 
clear up the obscurities concerning the spore forms of Pleospora 
herbarum, found a fungus, the pycnospores of which gave 
Alternaria spores as well as pycnidia in pure culture, but this 
species was not named, nor was it genetically connected with 
the Pleospora. It is interesting to note in this connection that 
Brefeld(1) found Alternaria stages, but not pycnidia, in the 
life-history of Pleospora vulgaris and Pleospora infectoria, while 
in Pleospora herbarum the accessory spore form was Macro- 
sportum commune. 
Some years ago Massee(ro) described a disease of tomato 
fruits caused by Macrosportum tomato and stated that pycnidia 
forming hyaline conidia accompanied the multiseptate spores, 
although no proof was brought forward that the two spore 
forms were genetically connected. In our investigations, species 
of Macrosporium have frequently been seen on diseased tomato 
fruits but upon isolation have always proved to be non-patho- 
genic. It seems likely that Massee’s account of a tomato fruit 
