INSECTS, DISEASES AND SPRAYING 51 



supply of soap and water. Kerosene emul- 

 sion is of course a proper remedy for this, too. 



The rose is just as likely as any other plant 

 in the garden to be attacked by the San Jose 

 scale, and must be treated similarly to other 

 infected plants. The lime-sulphur-salt wash 

 is found to be superior to all other remedies 

 yet tried. An objection to this lies in the 

 'whitewashed effect given to the plants, but 

 the addition of lamp black to the mixture 

 tones down the colour to a dark greenish 

 grey, which in the garden is worth the little 

 extra trouble involved. 



Sometimes curious half-circular pieces are 

 cut out of rose leaves by the leaf-cutter bee, 

 which deftly makes them into long tubes con- 

 taining several cells in which its young are 

 developed. 



DISEASES 



The rose is subject to a hundred or more 

 fungous diseases, the majority of which, hap- 

 pily, are not serious obstacles to the gardener. 

 There are a few^, however, among the host 

 which add to the troubles of the grower. 



The Black Spot is the most wide-spread and 

 conspicuous of all the diseases. It was first 



