494 



DISEASES OF CULTIVATED PLANTS 



Spore -mass subgelatinous, deep red; conidia fusiform, 

 curved, 3-5-septate at maturity. 



Clean seed obtained from a district free from the disease 

 should be sown. There is also a danger of infection from 

 the presence of wild grasses. 



Frank, Jahrb. d. Deutsch. Landwirth. Gesell., 1892. 

 Matthews, Journ. Roy. Mor. $oc., 1883, p. 321. 

 Smith, Diseases of Field and Garden Crops, p. 209. 



FIG. 149. Fusarium heterosporum. i, portion of 

 an ear of rye showing diseased grains ; 2, diseased 

 grains ; 3, portion of a diseased grain showing the 

 dense clusters of spores on its surface ; 4, spores. 

 Fig. i nat. size ; remainder mag. 



Red mould of Wheat (Fusarium culmorum, W. G. Sm.) 

 is said by Smith to attack wheat, forming cream-coloured, 

 yellow or orange, subgelatinous masses on the ear, gluing 

 the various parts together and preventing the development 

 of the grain. The conidia are said to be larger fhan those 

 of F. heterosporum, fusiform, 3-5-septate, orange, soon break- 

 ing up at the septa. 



A somewhat doubtful product, orange spores in Fusarium 

 being an anomaly. 



Smith, Diseases of Field and Garden Crops, p. 208. 



Cotton frenching (Fusarium vasinfectum, Atkinson) is 

 stated by Atkinson to be the cause of a cotton disease, which 

 consists in a gradual discoloration of the foliage. The 



