November 22, 1919 



HORTICULTURE 



449 



isfactorily on shale soils or any other 

 soil that tends to pack. Sometimes 

 the first crop on soil subjected to high 

 steam sterilization does not thrive^ 

 but the second crop is usually satis- 

 factory. 



Caution. Do not add manure or un- 

 treated soil to the seed-bed after ster- 

 ilization; it may carry organisms of 

 disease and cause infection. The 

 diseases that persist in the soil can 

 be very readily carried on the farm 

 implements and also on the feet of 

 the workmen and work animals. 

 Therefore, it is usually necessary to 

 take precaution to prevent infection of 

 clean soil in this way. 



Some diseases are carried on the 

 work tools during the growing season. 

 If these diseases are present, the crop 

 should not be cultivated or harvested 

 when wet from dew or rain, and the 

 tools should be thoroughly cleansed or 

 disinfected before using them on an- 

 other crop which is susceptible to the 

 same diseases. 



Seed Selection. Some diseases can 

 be avoided or held in check by seed 

 selection. The seed should be selected 

 from healthy plants that yield a prod- 

 uct of the size and quality desired. 



Cuttings. In making cuttings great 

 care should be exercised in the selec- 

 tion of nothing but healthy plants. 

 These cuttings should always be set in 

 sand or soil free from disease organ- 

 isms, preferably sterilized soil. 



Resistant Varieties. The control of 

 some diseases is so difficult and ex- 

 pensive and the results so uncertain 

 that it is advisable to grow varieties 

 resistant to the diseases in question. 

 The susceptibility of some of our old 

 varieties to disease accounts for their 

 disappearance from the market. 



Insect Carriers. The organisms of 

 some diseases are carried by insects, 

 and therefore it is very important to 

 eradicate insects as far as possible. 



Spraying. Our knowledge of spray- 

 ing ornamental plants is rather lim- 

 ited. Some spray mixtures injure the 

 plants and do more harm than good. 

 The fact that a certain mixture can be 

 used on special species or varieties 

 without injury is not evidence that it 

 can be used on others. It is always 

 advisable to test the spray mixture on 

 a few plants before using it on any 

 considerable number of plants. 



Ammoniacal Solution of Copper Car- 

 bonate. This mixture will not stain 

 the foliage and therefore is frequently 

 used as a substitute for Bordeaux mix- 

 ture on ornamentals and on fruits just 

 before ripening. However, it is a 

 treacherous mixture and should never 

 be used without first testing on a few 

 plants. It is made as follows: 



ALL IMPORTED BULBS 



DUTCH— FRENCH— JAPANESE AT TRADE PRICES 



Keep your Counter Display Alive 



Nothing Better than Bulb* and None Better than Ours 

 Moderate cost. Big Profits. No Loss 



Tulips, Hyacinths, Narcissus 



Finest in Cultivation 

 Write for "Book for Florists" 



New^Y^c^tyVau^han's Seed Store 



33 W. Randolph 8t 

 Chicago, III. 



THIS SEASON'S NEW ROSES 



PILGRIM CRUSADER PREMIER RUSSFLL HADLEY 



We are receiving dally shipments of these new Roses, In large quantities, and 

 can furnish same on short notice. 



We have a large stock at all times of choice CARNATIONS, CHRYSANTHE- 

 MUMS, ORCHIDS, VALLEY and AMERICAN BEAUTIES. 



Tel., Main 6267 ll/L'I pil DpAQ prj 262 DEVONSHIRE STREET 

 5948 * ¥ L.L^n UIVUO. \^\Jm BOSTON, MASS. 



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iDolltatl) & Sons 



Plant Specialists 



CYCLAMEN-BEGONIAS— PRIMROSES ! 



Our 

 Leaders 



Christmas Stock of all Kindt in J ancy Grades 

 Come and Inspect Our Stock. Never in Better Condition 



139 Beaver Street 



WALTHAM, MASS 



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Copper carbonate 6 ounces 



Ammonia (26° Baumg) . 3 pints 

 Water 60 gallons 



Dilute the ammonia with 15 pints of 

 water. Mix the copper carbonate in 

 a small amount of water to form a 

 paste. Mix the paste in the dilute 

 ammonia. Add enougn water to make 

 50 gallons. Use immediately. It de- 

 teriorates very rapidly. 



Potassium Sulfide (liver of sulfur). 

 Mix 1 ounce of potassium sulfide In 

 a small amount of water to form a 

 paste. Then mix in 2 or 3 or 4 gal- 

 lons of water and use immediately. 

 This is the most satisfactory treatment 

 for powdery mildew. 



Dusting with Sulfur and Arsenate ot 

 Lead ha.s proved to be an exceptionally 

 good treatment for a number of 

 diseases, as previously referred to in 

 this circular. The sulfur should be 

 ground very fine and mixed with arse- 

 nate of lead at the rate of 90 parts 

 of sulfur to 10 parts arsenate of lead 

 by weight. This mixture should be 

 fine enough to pass through a 200- 

 mesh sieve and may be obtained 

 ready-mixed from a number of manu- 

 facturers. 



CORRECTION OF ARDMORE 

 REPORT. 



Dear Sir — There are two serious er- 

 rors in the report of the Ardmore 

 show of this society published on page 

 415 of your Issue of November 15th, 

 1919. 



The report says "Mrs. George Drexel 

 W. Childs" and "Mrs. Frank Thomson 

 were among the prize winners." 



The first name should have been, 

 "Mrs. Geo. W. Childs Drexel." At this 

 exhibition, Mrs. Drexel was not an ex- 

 hibitor but offered several prizes. 



Mrs. Prank Thomson has been de- 

 ceased many years, and every year 

 since her death, her daughter, Miss 

 Anne Thomson, has offered prizes for 

 cut blooms and plants of the variety, 

 Mrs. Frank Thomson, in order to per- 

 petuate this variety which was named 

 for her mother. 



Unfortunately, these two errors 

 above effect two families who have 

 been very good friends indeed of this 

 society, and we ask you kindly to an- 

 nounce the correction in your next 

 issue. Yours truly. 



David Rust, Secy. Secretary. 



