2 7 



leaf. These spots for some time continue to increase in 

 size, and gradually change to a pale brown colour and 

 are bounded by a dark line. If the leaf is attacked 

 before it is full grown the brown patches usually fall out 

 leaving holes in the leaf. In other instances the dead 

 patches remain fixed, and if a dead diseased leaf is 

 examined during the winter with a magnifying glass, the 

 brown patches will be seen to be studded with very 

 minute black points, which are the reproductive bodies 

 of the fungus. The sma dead pieces that fall away 

 also produce fruit during the winter when lying on the 

 ground (see Plate IV.). 



PREVENTIVE MEASURES. 



This is a very difficult fungus to eradicate, owing la 

 the particles of diseased leaves bearing the fungus 

 falling away and being blown far and wide by the wind, 

 also on account of the extreme prevalence of the disease 

 on|wild Roses and brambles. 



Where the disease has existed the bushes and also 

 the surrounding ground should be thoroughly drenched 

 with the sulphate of copper solution recommended for 

 winter use. In the spring spray with liver of sulphur,, 

 commencing when the leaves are half grown, and repeat 

 as required. 



All diseased leaves, whether on the ground or 

 remaining on the bushes, should be collected and burned. 



SOOTY MOULD (Fumago sp.) 



Not infrequently the leaves of Roses and many other 

 kinds of plants, both cultivated and wild, become more 

 or less covered with a black, sooty layer, which can be 

 peeled off in flakes during dry weather. 



