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The Weekly Florists^ Review* 



August 8, 1907. 



TREATMENT OF BLACK SPOT. 



The season is now approaching when 

 black spot will make its appearance in 

 Beauty benches, and it should be the 

 duty of every grower to take due pre- 

 caution to avoid an attack of this pest, 

 and to stamp it out on its first appear- 

 ance. Houses which are situated on low, 

 marshy land or are much sheltered are 

 more liable to be the subject of this 

 trouble than those on higher and more 

 exposed ground. 



Care should be taken to keep the at- 

 mosphere as dry as is consistent with 

 the health of the plants. Avoid all sud- 

 den fluctuations of temperature and be 

 sure to have the foliage dry by sundown. 



During protracted cold, wet spells it is 

 good policy to start firing, in order to 

 keep a good circulation of air, as there 

 is no condition more favorable to the 

 germination and spread of this trouble 

 than a close, muggy atmosphere. 



To prevent and hold this fungus in 

 check, a spraying of the carbonate of 

 copper compound is recommended, using 

 three ounces carbonate of copper and 

 one gallon of ammonia to fifty gallons 

 of water, and applying once a week. This 

 should be applied in the form of a very 

 fine spray, taking care to give every 

 part of the surface of the leaf, both up- 

 per and under side, a good wetting. 



Cleanliness and care play an important 

 part in the checking and prevention of 

 this trouble. Those leaves at the base 

 of the stem, which, owing to their prox- 

 imity to the soil, are the first to get wet 

 and the last to dry out, arc the first af- 

 fected and many growers make it « 

 point to have them removed before the 

 critical season commences. 



All affected leaves should be picked 

 off and burned and a careful watch 

 kept every day for indications of the 

 disease spreading. Ribes. 



AMERICAN ROSE SOCIETY. 



Meeting; at Philadelphia. 



It is desirable that a meeting of the 

 members of the American Rose Society, 

 and all who are interested in the rose, 

 and particularly such as are specially 

 interested in the 1908 meeting in Chi- 

 cago, be arranged for during the S. A. F. 

 week in Philadelphia. 



The eastern growers will there have an 

 opportunity of meeting many of the 

 western growers, and can perfect ar- 

 rangements for the convention and ex- 

 hibition much more readily than can 

 be done by correspondence. I would 



strongly urge upon the rose growers 

 meeting in Philadelphia, the importance 

 of arranging to, attend this meeting and 

 lending their influence and assistance, 

 moral and material, to make the 1908 

 meeting by far the best in the history 

 of the society. 



Our secretary, Mr. Hammond, will be 

 in attendance at the S. A. F. convention 

 and will arrange for time and place of 

 the rose meeting and announce the same 

 in due course. I regret that I will not 

 be able to be with you, but our vice- 

 president-elect, Mr. Breitmeyer, will be 

 present and will preside over the meet- 

 ing. Robert Simpson, Pres. 



PARROT TULIPS FOR BEDDING. 



I am intending using tulips for spring 

 bedding. Are the parrot tulips suitable 

 and would you advise a carpet of pan- 



sies or forget-me-nots, or something 

 else? I would like to use a carpet of 

 some sort. The location is about 400 

 miles north of San Francisco and ninety 

 jniles from the coast. D. M. 



Parrot tulips are less satisfactory for 

 bedding purposes than other varieties. 

 Their brilliant colorings and oddly 

 marked flowers make them fascinating 

 and popular, but unfortunately they have 

 weak stems, which will not hold the 

 flowers erect when expanded. After a 

 storm of wind and rain they are so 

 bent, broken and bespattered as to be 

 of little value. We think they are well 

 worth growing in small clumps, but ' 

 think a bed such as you plan would be 

 disappointing if you used them. If, per- 

 chance, you wish to try them, I would 

 suggest the variety Cramoisi Brilliant, 

 the finest of all parrots and very free 

 blooming. The color is carmine and for 

 this a groundwork of white and yellow 

 pansies or white daisies would be suit- 

 able. If you use Lutea major, yellow, 

 or Markgraaf, scarlet and yellow, the 

 myosotis would do very well for a 

 groundwork. With a mixed bed a light 

 groundwork is best. 



I think you would be better satisfied 

 if you used some of the early bedding * 

 tulips, such as Joost von Vondel, Chryso- 

 lora, Thomas Moore, Belle Alliance or 

 Proserpine, or any of the fine named 

 Darwin late-flowering varieties, such as 

 Glow, Gretchen or Edwin Rostand. It 

 is better to use one variety in a bed, 

 rather than a mixture. W. N. C. 



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SEASONABLE 



SUGGESTIONS 



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Dendrobiums. 



These two useful florists' dendrobes, 

 D. nobile and D. Wardianum, if they 

 have been making their growths in a 

 warm, moist house, should now in some 

 cases have the pseudobulbs pretty well 

 made up and should be moved to a drier 

 house, where they can obtain more light. 

 Do not give direct sun at once, as the 

 rays are still too powerful. Keep the 

 plants rather drier at the root, but 

 syringe overhead once or twice on hot 

 days. Much of the success in flowering 

 dendrobes depends on the thorough ripen- 

 ing of the bulbs. We have seen them 

 hung under trees outdoors. This answers 

 well in dry weather, but the soakings of 

 thunder showers are not desirable. On 

 some private establishments, fruit houses, 

 from which the crops have been gathered, 

 prove ideal resting places. On commer- 

 cial places they do well hung over the 

 paths in a carnation house, the little 

 shading usually placed on the glass 

 when the carnations are planted just 

 breaking the sun's rays sufficiently. 

 Plants with balls only partially com- 

 pleted should be kept well watered and 

 syringed until the balls are fully made 

 up. 



Dendrobium formosum giganteum is 

 one of the most useful of all blooming 

 orchids. The flowers rival in size those 

 of some of the cattleyas and their color, 

 pure white with a yellow throat, makes 



them especially valuable for florists. This 

 dendrobe revels in a warm, moist house, 

 like all others of its kind when growing. 

 The flower buds will now be appearing 

 on the tops of the new growths. When 

 expanded they will last better in a rather 

 cooler and drier house. 



D. Phalsenopsis Schroederiana should 

 now be making vigorous growth and the 

 flower spikes will be showing here and 

 there. It needs heat to properly develop 

 its long, graceful sprays, which are in- 

 valuable to all florists who can use or- 

 chids. Watch for small shell snails, 

 which sometimes gnaw the spikes. Lay 

 traps of lettuce leaves for these. 



Cattleyas. 



That valuable and popular autumn 

 blooming variety, Cattleya labiata, will 

 in many cases now have its bulbs pretty 

 well completed, with sheaths showing on 

 top of the bulbs. Keep the plants well 

 up to the light, but do not decrease the 

 water supplies until the bulbs are well 

 hardened. C. Trianae, the standard mid- 

 winter cattleya, is also completing its 

 growths in some instances. It is a pity 

 that this valuable orchid cannot be made 

 to produce the number of flowers per 

 sheath that the fall flowering C. labiata 

 does. Ofttimes big, fat bulbs will pro- 

 duce but one flower, instead of three or 

 four, as expected, and prove disappoint- 

 ing to the grower. This trouble is not in- 

 frequently caused by growing the plants 



