The Canadian Horticulturist. 307 



Rose Mildew. 



750. Sir, — I take the liberty to enclose herewith a few rose leaves. They are losing 

 their color and curling up just as if it were from drouth, but I think the trouble is from 

 some parasite ; if so, I shall esteem it a favor if you give me a cure. Please do not 

 wait to reply through the HoRTicrRTURiST, as my bushes might be spoiled by the time 

 the next number will be issued. General Jac. and others of my best roses seem most 

 affected. 



R. CcxxiXGHAM, Guelph. 



(Reply by Mr. John Craig, Ottawa ) 



Your letter of the 20th inst. is received, and with it samples of rose foliage 

 affected with a fungous disease. I have examined these carefully, and believe 

 the foliage to be affected with the common form of rose mildew, viz., Sphcero- 

 theca pannosa. This is a very troublesome disease ; especially in greenhouses, 

 but there conditions are such that it can be controlled more completely than 

 when the plants are grown out- of doors. The principal remedy, and one which 

 has been generally considered satisfactory, is to apply the fumes of sulphur ; but 

 out-of doors this is impracticable, and I would, therefore, recommend either of 

 the following fuugicides : Copper sulphate, quarter of an ounce to five gallons 

 of water ; or ammonical copper carbonate, quarter of an ounce to five gallons 

 of water. I would spray the plants immediately with either of these mixtures. 

 You will probably be able to get the copper sulphate more readily than the 

 ammoniocal copper carbonate. On account of the disease having such a foot- 

 hold, three or four applications at intervals of five or six days will be necessary 

 to arrest it. 



$ ©pef7 Lettep^. ^ 



Best and Cheapest Way of Keeping* Parsley Out-of-Doors During- 



Winter. 



(Answer to A. M. Wilcocks, of Richmond, Que.) 



In the first place, it may be well to state that parsley is a biennial plant belonging to 

 the botanical family of Umbelliferce. It, therefore, takes two years to complete its life 

 cycle. Ordinarily, or under favorable conditions, we would expect it to live over winter, 

 and protluce its seed the second year in the same way as the parsnip and carrot. In the 

 colder portions of Canada, however, the plant is frequently killed during the firet winter, 

 and especially is this the case when the seed is sown upon light sandy soil, but if sown on 

 good rich loam and in such a situation as is likely to be covered by early autumn snows, 

 and also well protected throughout the winter, it is not usually winter killed. Therefore, 

 in sheltered gardens little protection will be needed, as a rule, to carry it through the 

 second year. Where protection is necessary, I would suggest mulching on either sides of 

 the rows with forest leaves or straw after the ground has become stiffened by the first 

 frost. A frame made of boards would be of assistance and use in holding the leaves or 

 straw near the row, and preventing it from blowing away. 



John Craig, Horticulturis'. 



