THE STRATVBEEET LEAF-BLIGHT 



105 



have pushed through the tissues of the leaf^ aud to have 

 formed all over the brown central region of the spot, 

 but most abundantly at its margins, small whitish tufts, 

 looking like microscopic shrubs. These are the fruiting 

 parts of the parasite, and are made up of numerous 



FIG. 49. STRATVBEREY LEAF AFFECTED WITH BLIGHT. 



threads, each bearing at its summit a long jointed spore. 

 As these latter ripen tliey are set free, and are scattered 

 upon fresh leaves by winds and rains, to germinate 

 there, push into the leaves and form new spots.*' The 

 fungus is propagated by these long spores throughout 



