IX PESTS 163 



Her Majesty for instance. It is a good plan to grow 

 these among the Teas, or, better still, by themselves, 

 where they will not, in the early part of the season, do 

 so much harm by infection. 



For remedial measures, keep the sharpest look out 

 when mid- June arrives, or even before, for the first spots. 

 Search them out, and attack them all above and below 

 with finger and thumb, powder distributor, or syringe. 

 Sulphur alone is good enough, if it reaches every part, 

 the under as well as the upper side of the leaves. 



The objection to the use of a solution of sulphide of 

 potassium seems to me to be that being merely a liquid 

 without any greasy nature it runs off the leaves at once. 

 A mixture of soft soap and sulphur in water is best for 

 the swinge, which must be used if there is any wind : 

 but I still believe that pufiing sulphur from below as well 

 as above, when the air is still and the leaves are damp, 

 is as good a remedy as is to be found. Sulphur is 

 the destroying agent, whatever mixture or specific is 

 used. 



For Roses under glass preventive measures will consist 

 of great care in the ventilation. One year, by way of 

 experiment, I never opened the ventilators at all for 

 my Marechal Niel, and it bloomed extremely well. 

 Better no air at all than a cold draught when the sun 

 is hot, I am sure. Sulphur upon the hotwater pipes is 

 the well-known remedy, and for pot Roses I should use 

 finger and thumb with sulphur or sulphur solution. 



Orange Ftmrjus or Red Rust.—T\\i^ fungus-pest is not 

 so well known or so harmful as mildew ; but it is more 

 difficult to combat, either by preventive or remedial 

 measures, for its growth is inside the leaves and stems 

 of the Rose, and it is only when the spores are ready 

 for dissemination and scatter with a touch that it 



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