FttiiiiUAiiY !t, 1922 



The Rorists' Review 



27 



tensive, would be nothing less than 

 (•:il:iiiiitoiis. W. N. 0. 



OWN-ROOT OR GRAFTED ROSES. 



Which is considered better by rose 

 growers, owji root or grafted sto<'l< for 

 Columbia, I'reniicr or Ophelia? 



S. 11.— Mo. 



Premier does better on Mauetti on 

 our place. In other soils and other 

 places it seems to thrive on its own 

 roots. Columbia docs well eitlier on own 

 roots or grafted. We jirefer grafted 

 stock. We think Ophelia is better when 

 grafted, but why grow Ophelia when 

 Butterfly is preferable in color, growth 

 and freedom of bloom f E. G. Ilill. 



BAN ON ROSE BUSHES. 



In Maine. 



Dr. Edith M. Patch, of the University 

 of Maine experimental station, Orono, 

 Me., who has been conducting an ex- 

 haustive study for a number of years 

 of the potato mosaic disease, has finally 

 come to the definite conclusion that rose 

 bushes, cultivated as well as wild, must 

 be destroyed iu Aroostook county and 

 other potato sections of Maine in an 

 endeavor to eliminate the destructixe po- 

 tato mosaic disease. 



Dr. Patch explains that i)otato mo- 

 saic, a disease which is specially inju- 

 rious to the potatoes intended to be 

 used for seed in the southern states, is 

 injected into tlie jiotatoes by the pink 

 and green aphides, whicli hatch their 

 young on rose bushes. A study of po- 

 tato aphides was commenced by the 

 doctor as far back as August, 1904, when 

 it was reported to be numerous and troii- 

 lilcsome to potato vines at Harlton. The 

 doctor devoted much time to the inves- 

 tigation in 1906 and 1907. 



''After the discovery in 1919 by Dr. 

 K. S. Scliulz and Donald Eolsoni, of tlie 

 experimental station staff, that the 

 (ilant disease known as ])()tato mosaic 

 is transferred to the ]iotato ]dMnt by 

 the i)ink and green aphides. Dr. I'atch 

 continued lier investig«tion and after 

 long research she lias coiicluded that the 

 jiotato aphis and rose bush a])his are one 

 and the same thing ;ni4, conse()uently, 

 that Toxo bushes, to use her words, are 

 ''guilty of being a ])ernicious weed with 

 refen-nce to jiotato culture." 



Rose Bush Weed. 



Dr. I'atch 's investigations are of ^rt;it 

 interest, not only to the many jieople 

 eng.'iged in the ]Potato growing industry 

 ill .\roostook county. Me., but elsewhere 

 .■ilso, as a distinct contribution to en- 

 toniologic.'il knowledge, for. with the aid 

 of information furnished, it will be jios- 

 sible to exterminate the disease-carry- 

 ing ajihides in the potato growing sec 

 tions. The doctor is quoted: "I should 

 hate to be quoted as urging farmers to 

 destroy all rose bushes on their j)rein- 

 ises. I am sim]dy laying the facts lie- 

 fore them in this bulletin and they can 

 <lo .'IS tlicv please. For anymie inter- 

 ested in griiwiiig certifi<'d potato seeds. 

 1 woidd suggest the slog:in, ' .\ mile 

 from the ne.'irest rose bush.' " 



.\roostook countv last season ])ro- 

 duced about .'{7,000.000 bushels of ])0- 

 tatoes ,*ind the quality of the seeil has a 

 wiilr cehdirit V. The issn.nice of Dr. 



Patch's report will, unfortunately, mean 

 the complete wiping out of roses under 

 glass and outdoors in this county. Un- 

 doubtedly, other jjotato growing sections 

 in Maine and elsewhere may be led to 

 adopt similar measures. This would 

 seem to be a decided menace to rose 

 culture and it behooves rosarians, the 

 American Kose (Society and flower lov 

 ers generally to see if something cannot 

 be done to check this great menace to 

 floriculture. 



We in Massachusetts are threatened 

 with the complete destruction of all cur- 

 r.-mts and gooseberries to stop the spread 

 of the white i)ine blister rust. Some 

 years ago the common barberry, Uer- 

 beris \iilgaris, and some others of the 

 genus were blacklisted .as being responsi- 

 Ide for the wheat rust, but this is the 

 first time a tiowering jdant, ])opul;ir the 

 world over and classed as the queen of 

 flowers, has been condemned as a dan- 

 gerous menace. 



Tlie Jiotato mosaic disease is just as 

 prevaU'iit in Europe as here and, if Dr. 

 Patch's findings are- correct and find ac- 

 ceptance, the effect on the rose industry 

 in (ireat lirit.-iin and Irel.anrt-. France 

 .•iiid other Miirojiean countries, where 

 liotii |iot;it(i and rose ciiltnre :ire ex- 



THRIPS ON COLUMBIA. 



We planted two houses to Columbia 

 roses last sj)ring in solid beds. They ap- 

 pear to bo doing well and look healthy, 

 but a number of the buds on ttio strong- 

 est plants come like the buds enclosed. 

 Will you give the reason .for this and 

 advise as to how it can be avoided? 



A. c. w.— X. y. 



The Columbia bmls received were 

 badly affected by thrips. This is a hot 

 weather insect whicli usually does not 

 do any damage during winter months, 

 but keejiing the temperature at Git de- 

 grees at night may cause thrips to keeii 

 right on attacking the flowers. For 

 Columbia the best night temperature is 

 •iO degrees and, with solid bed's, 6S de- 

 grees is all right. At a higher temper- 

 ature the i>lants are liable to grow weak 

 and the flowers may be sni.all. Spray 

 the plants once a week with Paris green 

 and brown sugar, using one jiart of Paris 

 green and five parts of brown sugar, 

 one ounce to a gallon of water. The 

 insects will feed on the sug.ar instead of 

 the rose buds !ind the Paris green will 

 soon do awav with them. W. .(. K. 



CARNATIONS SPLITTING. 



I am growing Kncli.int ress cain.at ions 

 .•tiid find a gre;it many sjilits among the 

 whites. They split while still in the 

 liud. ('.Ill \ou tell me what is causing 



this? ir. p. H.- X. V. 



There iii;iy be many conf ribiit ing fac- 

 tors in the s]ilitting of cariiat ions, most 

 of whiih (•.■111 lie coiitrolhMi. Hut the 

 one which is the greatest is beyond the 

 control of in;in. .Vfter ii long, cloudy 

 spell, the sun comes out for two or three 

 <l;iys. and then look out for sjilit 

 calyxes! During the cloudy weather 

 gr<iwth is slow anil the growth deficient 

 in fiber. < 'oiise(|iien1 ly, when the sun 

 collies out ,iiid causes the growth to take 

 a juni|i. the weak calyxes are not strong 

 enougli to hold the rapidly expanding 

 buds. That is the cause of more split- 

 ting than all else. 



The same is true of running the tem- 

 ]ier,it iires too liigli foi- :i period, wTTich is 



fre(|uently done to force a lot of blooms 

 (Jilt for Christ mas. .\ few weeks .after 

 the temperature h:is been reduced you 

 see the crop of splits. Hobl your tem- 

 jieratures even, and even a trifle lower 

 than customary, during a long, vlondy 

 spell. The growth will bo somewhat 

 slower ami you will cut fewer blooms 

 during tli;if jieriod, but you will easily 

 make it up later through increased (|iial- 

 ity and fewer sjilits. A. F. .T. B. 



COMBATING CARNATION RUST. 



I am sending you some carnation cut- 

 tings, wlii(di. to my mind, are affected 

 with rust. Will you kindly tell me how 

 to comb;it this pest ? R. 



Tli(> s|ie(imeiis submitted are affected 

 with rust. This is the result of im- 

 jiroper cultural conditions and there is 

 nri remedy to destroy it without injuring 

 the phints. By correcting your cultural 

 conditions it will gradually disappear. 

 You could pick off the affected leaves, 

 thereby getting rid of a lot of the spores 

 Mild ]ire\-entiiig s]ire;idiiig of the disease 



