6Qg The Philippine Journal of Science iw» 



fruits is probably due to G. limetticolum. Although the serious 

 wither tip and anthracnose of the lime and lemon are due to G. 

 limetticolum, Colletotrichum gloeosporioides is regarded by Faw- 

 cett(5) as the cause of rots of mature fruits of citrus varieties. 

 Darnell-Smith and Mackinnon(3) in New South Wales have also 

 described a disease, brown spot of Emperor mandarin orange 

 fruits, which they ascribe to C. gloeosporioides. There are, 

 therefore, two fungus species apparently pathogenic upon Citrus 

 species, neither of which has been considered by Nishida in 

 describing his new Gloeosporium species. 



Nishida'sCD description of this species is in Japanese, and 

 since it is probably inaccessible to most American and European 

 pathologists, a translation is presented here: 1 



There are differences between this disease and Gloeosporium eitri- 

 colum Massee in the respect that the former has septa in its conidiophores 

 and its conidiophore branches. So these two fungi are clearly different. 

 Since to my knowledge no fungus has been previously described similar 

 to this, parasitic on citrus trees, I recognize it a 

 Gloeosporium foliicolvm sp. nov. 



Its characters are as follows: The groups < 

 the cuticle on the upper sides of the leaves. Later 1 

 splits and the groups of spores upheave. The spores 

 ooze. The color of the spore group is light reddish brown and i 

 is about 120 micro-millimeters. It also grows on the surface of the dead, 

 newly grown twig and fruits. The conidiophores grow densely in bundles; 

 the shape of each conidiophore is cylindrical and its tip is slightly pointed; 

 it is frequently branched. It has two or three septa and is colorless; its 

 length is 36-48 m and its width is 4-5 m. The spore grows on the tip of the 

 conidiophore and has no curve; the tip of the spore is round and is slightly 

 sharp (narrowing or pointed) ; there are few granular things in its body 

 and it is colorless; it is twenty to fourteen n in length and 4-6 V- in width. 

 It germinates from one end. 



This fungus parasitizes all citrus trees but gives specially much damage 

 on navel orange, unshiu orange, and natsu daidai. 



In conversation with Doctor Nishida it developed that in de- 

 scribing this fungus as the cause of a leaf -fall disease of Citrus, 

 the organism had not been isolated in culture nor had subsequent 

 inoculations been made. It has seemed desirable, therefore, to 

 compare this fungus with the closely related pathogenic species 

 on Citrus, Colletotrichum gloeosporioides and Gloeosporium li- 

 metticolum. 



The following cross-inoculation data and comparisons are 

 therefore submitted, not as entire proof of the validity of 



1 The translation of this passage from Nishida's book on citrus diseases 

 is through the kindness of Mr. T. Takahashi, formerly plant inspector, 

 Nagasaki Plant Quarantine Station. 



