498 



FUNGI IMPERFECTI. 



exhibit reddish or yellow spots ; therein the mycelium spreads 

 rapidly and gives off tufts of eonidiophores which rupture the 

 epidermis. The eonidiophores are septate, branched, and give 

 off chains of unicellular oval conidia. Meanwhile the affected 

 fruit becomes rotten and gradually shrivels up, it remains, 

 however, hanging on the tree throughout the winter. During 



Fig. 306. — Monilia fi-uctigena. A, Apple showing the grey conldial patches as 

 more or less concentric lines. S^ Young Peach, smivelled up in consequence of 

 attack, (v. Tubeuf del.) 



next spring, when the fruit is again moist, further conidia are 

 given off. Infection takes place by wounds or even through 

 the epidermis of young leaves and blossoms. The conidia have 



Fig. 307. — Monilia frucliqena. Branched conidiophore with chains of conidia. 

 a, Branched hypha of Monilia in the tissue of an Apple, (v. Tubeuf del.) 



been found to retain their vitality for two years. Smith ^ 

 found that twigs were also affected by the disease, so that a 

 gummy degeneration took place in the soft bast and cambium. 

 As remedial measures, the gathering of all diseased fruit left 

 hanging over winter is strongly recommended. This, as well 

 as other diseased parts, should be burned as soon as possible. 



1 Smith (Erwin), JoumaX of Mycology, vn., p. 36. 



