66 MARKET NURSERY WORK 



Mildew is not the only disease. We used to suffer from Red Rust 

 in the days when the manetti was the leading, if not the only, stock, 

 and this, though not so prevalent, is still with us. There is, however, 

 a danger of another disease, the Black Spot, becoming more common, 

 and this has been more apparent since the Pernettiana roses have 

 been introduced. Our methods of dealing with both these diseases 

 are simple and, we consider, successful : We just gather and burn 

 affected foliage and subject the plants to a spraying in the late 

 winter with a copper solution. 



