496 DISEASES OF CULTIVATED PLANTS 



destruction of the flower buds of the sour cherry, due to 

 Fusarium gemmiperda (Aderh.). The symptoms are similar 

 to those caused by Monilia, and have probably often been 

 passed over as such. The ascigerous condition of the 

 fungus, probably a Nectria, was not discovered. 



The conidia are of the usual Fusarium type, cylindrical 

 with pointed ends, curved, 4-5-septate, hyaline, 35 - 45 x 

 4-5 "5 F 



Aderhold, Zeitschr. Pflanzenkr., n, p. 65 (1901). 



Fusarium pannosum (Massee) forms extended, subgelati- 

 nous, bright red patches extending continuously for many 

 inches, on living trunks of Cornus macrophylla (Wall.) in the 

 Punjab. The fungus is thick and felt-like when dry, and is 

 then of a clear bright vermilion colour. It must be very 

 effective when seen in situ, and is probably an injurious 

 parasite. 



Fusarium gemmiperda (Aderhold) is described as attacking 

 and destroying the flower buds of the wild cherry. 



The spores are of the usual Fusarium type, 5-septate, 

 34-35 X4-5'5 /' 



Aderhold, Zeitschr. Pflanzenkr.^ 11, p. 65 (1901). 



Fusarium loliaceum (Ducomet) forms numerous small, 

 well-defined brown spots on the leaves of Italian rye-grass 

 (Lolium italicum) in France. The present species closely 

 resembles, superficially, Fusarium hordearinum (Ducomet), a 

 parasite on barley. Both species have a well-developed layer 

 of subcuticular mycelium, but in F. loliaceum the hyphae 

 that pass from the subcuticular mass at a later stage, into 

 the deeper tissues of the leaf, are intracellular, whereas the 

 corresponding hyphae in F. hordearinum are exclusively 

 intercellular. 



Forming spots on the host. Mycelium subcuticular, then 

 penetrating deeper. Conidia straight or slightly curved, 

 hyaline, fusoid-claviform, apex obtuse, base slightly narrowed, 

 continuous or often i-septate, rarely 2-septate, 15-21 x 2-5 \i. 



Ducomet, Ann I ' Fcol. Agric. Rennes, 2 (1908). 



FUSARIELLA (Sacc.) 



Vegetative mycelium creeping, nearly colourless, giving 

 origin to very short, erect, simple or branched conidiophores, 



