102 THE CULTURE OF THE CHRYSANTHEMUM. 



graph, except that, when hunted, instead of flying away 

 they drop as if dead. They are responsible for (the black 

 spots one sees on the lovely white fowers early in the 

 season ; and they are extremely difficult to catch amongst 

 the florets. 



Fungus. 



This is a disease which first appeared all over Europe 

 about the month of August, 1897. There seem to be two 



Leaf Containing Fungus. 



The above illustration shows a small leaf taken from an out-of-door 

 plant which developed fungus, although it had never been fed or treated 

 in any way, and certainly had not been crowded. 



distinct stages (or crops) of spores. One stage makes its 

 appearance about August, after a sudden change in the 

 temperature. The disease, if not checked, makes rapid 

 progress, for one plant with a few spots will soon distribute 

 millions of spores, and in a few days or weeks spots will 

 be seen in all directions. The fungus spreads very quickly 

 after the plants are housed, if precautions are not taken 

 to check it. The other stage appears just when the cut- 

 tings are rooting, or have just rooted. This is no doubt 

 due to the spores which have fallen from the old leaves on 

 to the cuttings below, and lie dormant until the cuttings 



