THE FUNGI WHICH CAUSE PLANT DISEASE 543 



The fungus occurs on all aerial parts of the raspberry and is 

 wide-spread in Europe and America causing serious disease. On 

 canes small purple spots first show near the grpund, enlarge and 

 soon develop ashen centers. The leaf spots are small, often 

 scarcely 1 mm. in diameter. 



G. mangiferse Hen. is found on mango leaves in Cuba ^*'' "" 

 and other West Indian Islands. 



G. olivarum d'Alm. parasitizes olive fruit in Europe. 



G. minus Sh. is on cranberry."' 



G. myrtilli All. is injurious to Vaccinium myrtillus. 



G. coffeanum Del. occurs on coffee in Java; 



G. pestis Mass. on yam leaves in Fiji. 



G. trifoUi Pk.i"-i" 



Spots subcuticular, brown, suborbicular, concentrically zonate; 

 conidia oblong to cylindric, obtuse, 15-23 x 4-6.3 ix. 



The fimgus was first observed in America and what was regarded 

 as the same was later seen in Europe as the cause of dying of stems 

 and leaves of clover. 



G. caulivorom Kirch. ^*' 



Caulicolous, spots forming long dark streaks, more or less sunken, 

 blackish-bordered; acervuli minute; conidia curved, more or less 

 pointed, 12-22 x 3-5 ft. 



This was said by Kirchner (see ^*') to be the cause of the more 

 serious European anthracnose affecting stem, fruit and leaf of 

 clover. Fulton ^** in 1910 reported it in America and showed that 

 pure cultures of the fungus readily produced infection in woimds or 

 even on un wounded succulent parts when in humid air. The conidia 

 have been known to live twelve months. 



G. morianum Sacc. is on alfalfa. 



G. medicaginis E. & K. 



Acervuli scattered, innate, blackish, rather large, visible on both 

 sides the leaf, opening below; conidia oblong, cylindric, granular, 

 subhyaline, more or less narrowed at the middle, 15-20 x 3—4 /i. 



On withered leaves and stems of alfalfa, defoliating the lower 

 part of the stem. 



G. manihotis Hen. is found on Cassava in Africa. 



G. lagenarium (Pass.) Sacc. on cucumbers is probably identical 

 with Colletotrichum lindemuthianum. 



