14 



The Rorists' Review 



July 26, 1017, 



NEW EOSES AT PARIS. 



Notwithstanding the great conflict 

 within hearing of Paris, the rose trials 

 at the Bagatelle gardens have continued 

 during the war. The report of the judg- 

 ing of new varieties this season has just 

 come to hand. The gold medals were 

 awarded to two yellow roses, one from 

 Pernet-Ducher, of Lyons, named Mme. 

 Caristie Martel; the other from Alexan- 

 der Dickson, of Newtownards, Ireland, 

 named Margaret Dickson Hamil. The 

 judges report that both these roses have 

 shown, during the period of their culti- 

 vation at Bagatelle, all the points of 

 good roses, including continuous flower- 

 ing from spring to autumn. Certificates 

 were awarded to the following: Mrs. 

 Mackellar, canary-yellow; Bed Star, 

 brilliant red; Henriette, orange tea. 



In spite of difficulties of transit, seven- 

 ty-six roses have been received at Baga- 

 telle this year to be judged in 1918. 

 Two were from America, one of which 

 has not yet flowered. Eeport says the 

 other, Los Angeles, was raised from 

 Mme. Segond Weber crossed w^ith Lyon 

 rose. It appears to be a valuable rose, 

 with the good points of both parents 

 combined. 



BLACK SPOT. 



I am having difficulty witli black 

 spot on rose plants in the greenhouse. 

 In order to maintain proper growing 

 conditions it is necessary to spray quite 

 frequently. What would you advise using 

 to check or eradicate the trouble? Any 

 information you can give me relative to 

 this will be appreciated. 



F. B. W.— Midi. 



Black spot is, for most rose growers, 

 the most injurious disease aside from 

 mildew, which does even greater harm. 

 The spot is caused by tlie fungus com- 

 monly known as Actinonoma rosa>. The 

 spots" occur on tlie upper side of the leaf 

 and the injury is in proi)ortion to the 

 number of spots; the entire surface of 

 the leaf may become affected by the 

 confluence of the spots. In bad cases 

 the leaves become yellow and defolia- 

 tion follows. Growers consider that a 

 prime cause of black spot is syringing 

 tlic plants so late in the day that they 

 do not become dried out by nightfall. 

 Consequently, the most severe attacks 

 of the disease may be expected where 

 the plants are bushy and so tied up that 

 tlio air does not circulate freely among 

 tlie foliage. 



Wliere the attack of black spot is light 



it frequently can be eradicated by re- 

 moving all the affected foliage and burn- 

 ing it under the greenhouse boiler. To 

 throw the foliage on the bench or under 

 it is as bad as to leave it on the plants. 

 Where the attack has gotten out of hand 

 and the disease has become virulent, re- 

 moving the affected foliage will not suf- 

 fice and a spray of ammoniacal copper 

 carbonate is recommended. This ma- 

 terial can be purchased of any supply 

 house. It is understood, of course, that 

 any treatment for the disease will be 

 ineffective unless accompanied by 

 proper treatment in the matter of syr- 

 inging and air. H. O. 



rooted in a close frame; one wit! 

 tie bottom heat is most suitable, 

 in sand overlying loam, or in 

 loam. I prefer sand. The w,; 

 cuttings is of the proper firmii, 

 when the flowers are opening. ,' 

 method of propagation is 

 bunches of cuttings averagin 

 inches long just before winter, 

 all leaves. Place the cuttings i-. 

 sand in a cellar over winter. In 

 as soon as the ground is open, j 

 trenches in well prepared groun> 

 ing only the top bud appearing 

 the surface. Firm the soil well 

 the cuttings. A large percent; 

 them will root. The roses may ; 

 propagated by budding or graftii 

 these methods need more skill tli 

 use of cuttings. C. 



' a lit. 



fioot 

 sandy 



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"Other 



cut 



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'It off 



■ Jamp 

 l.ring, 



Milt in 

 loav- 

 above 

 about 

 '-'e of 

 'so be 

 ., but 

 u tlie 

 W. 



PROPAGATING OUTDOOR ROSES. 



How shall I propagate outdoor tea 

 roses, ramblers and polyanthas? 



E. C— Ind. 



USE A NICOTINE EXTRACT. 



There is a small brown miller \hich 

 lays its eggs on my plants and th. eggs 

 hatch out a light green caterpillar which 

 eats the plants. My geraniums, Vever- 

 few and daisies have been eaten li\- this 

 pest and now it is on the chrysnnthe- 

 mums and snapdragons. The moths are 

 lively and hard to catch. I have used 

 cyanide so strong that it has burned 

 some of the plants, but the moths :ire as 

 lively as ever. Can you tell me what 

 to do to get rid of this pest? 



A. H. W.— Mass. 



Two methods of propagation by cut- 

 tings can be tried. Cuttings containing 

 a couple of eyes each may be taken dur- 

 ing July and early August, before the 

 wood becomes too firm, and should be 



Try spraying with one of the .strong 

 extracts of nicotine. There are direc- 

 tions on the label. I would spray in the 

 evening and wash over the plants early 

 in the morning with the hose. Kepeat 

 this until the pest is under control. The 

 pest you refer to is a bad one and sev- 

 eral sprayings will probably be neces- 

 sary. C. W. 



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Propagating Deciduous Shrubs. 



There still is time to propagate such 

 deciduous shrubs as viburnums, spiraeas, 

 loniceras, philadelphus, forsythias, 

 weigelas, hydrangeas and other varie- 

 ties from soft-wood cuttings, which can 

 be placed in sand in an ordinary propa- 

 gating house, or, better still, in a close 

 (oldframe, where the cuttings can either 

 be placed in flats of sandy soil or di- 

 rectly in the frame itself. On hot, sunny 

 days spray the cuttings several times 

 a day, but always lightly, and close the 

 sashes about the middle of the afternoon, 

 in order to bottle up a brisk heat. As 

 the cuttings start to callous, reduce the 

 spraying. When they start to root, run 

 the frame cooler and more airy. There 

 is no reason why many country florists 

 should not raise large numbers of decid- 

 uous shrubs in this way now, and later 

 in the season evergreens can be propa- 

 gated successfully in a cool grecnliousc. 



Cold Storage Speciosums. 



Pot up some cold storage speciosum 

 lilies now, to be flowered for Tli.auksgiv- 

 ing and Christmas. I find they succeed 



much better in 8-inch pots, in whieli an 

 average of five bulbs can be placed, tiian 

 in those of smaller size. The best pi ^i is 

 to half -fill the pots at first and top-u'css 

 afterward as growth advances. Keep 

 the plants in a cool pit or grecnli use 

 and be careful not to overwatcr tlicm 

 until the pots are well filled with r^ it*. 

 Speciosum lilies succeed better if gi ^^'i^ 

 10 degrees cooler than longiflorunis nul 

 in winter they should not be 1 P^ 

 warmer than 55 degrees at night. • ,"" 

 ciosums are most useful lilies for ut 

 ting and are splendid for design wor • 



Pansies. 



The last week in July or the 

 week in August is a suitable tini' 

 sow a main crop of pansies to be ' 

 tered in coldframcs or outdoors. Si 

 of New York sowings the middh 

 August would give plants of good - 

 North of Boston sowing should be u' 

 without delay. Except where 1; 

 numbers are to be grown, a coldfr- 

 is the best place in which to sow 

 seeds. Use a light and well pulver'; 

 soil, sow the seeds broadcast, shade 1 



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