THK CANADIAN HORTIOll.l L'KIST. 



127 



proposed remedies for scab on 



appl::s. 



By Wm. Saunders, London. 



At the winter meeting of our Asso- 

 ciation held in Woodstock, among many 

 Other interesting topics discussed was 

 that of the fungus, wlucii is popularly 

 known as " spot " or •' scab " on a)>ples. 

 A coui'iiittee of gentlt-men present 

 volunteered to conduct a series of ex- 

 periments during the coming season to 

 test the value of sulphur and sulphur 

 com;ioua'ls as preventatives, and with 

 the view of aiding in tliis woi'k I agrei-d 

 to furnish a short paper for the Cana- 

 '/idii Uin-ticuUnrixt. gi\iiig suggestions 

 a.s to the substances m )st likely to be 

 successful, and the prop )i-ti(>ns in which 

 they should bo used. At the same time 

 it wasagreed that experiments should be 

 mafle to further test the value of Paris 

 green as a remedy for the codlin moth. 



SalpfLur. — By tliis term is meant that 

 form of sulphur in tinn powder, known as 

 flowers of sulphur or sublimed sulpliur. 

 an article everywhere procurable and 

 cheap. The usual retail price of it is 

 ten cents per lb. The proportion which 

 should be used is one po'ind in from 

 ten to fifteen gallons of water, and ap- 

 plied with a syringe or force pump. 

 The finely divided sulphur must be 

 kept in susjjension by stirring the 

 liquid frequently with a stick. When 

 this mixture is showered on the tree a 

 tine deposit of sulphur ollects on every 

 part of it, and by the action of the sun 

 and air the sulphur is gradually con- 

 verted into sulphurous acid gas, one 

 »>f the most efficient ngents known for 

 the <lestruction of raihlew and fungi. 



Hi/iw-.^idphite of So'hi — This is a 

 white salt, re.i lily .soluble iu water. It 

 is made by boiling sulphur with a solu- 

 tion of caustic soda, at the .same time 

 passing into the mixture a stream of 

 sulphurous acid gas. It is much used 

 by photographers, and is generally kept 



by druggists, and in cities is usually 

 sold at about ten cents per pound, f his 

 may be used in the pro})ortion of one 

 pound, dis.solved in ten gallons of water, 

 the mode of application being the same 

 as for the mixture of sulphur and water. 

 As the solution in this instance is per- 

 fect no stirring is needed, anil when 

 this .salt is thus dissolved in water and 

 freely exposed to the air, as it is when 

 sprinkled on the foliage of trees, it de- 

 composes and de{)Osits sulphur which 

 acts as already described. 



Salplille of Lima. — This substance 

 may be prepared in the liquid form by 

 boiling together two pounils of sulphur 

 and one pound of quick lime in two 

 gallons of water with frequent stirring 

 until the liquid assumes a reddish yellow 

 color, when it may be allowed to S'-ttle, 

 and the clear liquid poured off. This 

 should be applied to the trees in the 

 proportion of one i)int oi the solution 

 to fifteen or twenty gallons of water, 

 and being a clear solution after it is 

 once well mixed it will need no further 

 stirring. The sulphide of lime solution 

 should be made out of doors on account 

 of the offensive odor which is given off 

 during the process. Any old tin or iron 

 vessel which is sound will do to make 

 it in ; the vessel containing the mixture 

 may be placed on a few bricks built up 

 so as to admit of a small fire umhr- 

 neath, and while boiling it should be 

 frequently stirred with a stick. 



All of these substances are likely t-) 

 be of use, they are very cheap, and it is 

 desirable that they l)e u.sed on a large 

 .scale and the results reported. 'Jhe 

 liquids should be applied soon after the 

 fiuit is well formed, and the application 

 i"epeated several times during the 

 season, varying the number of applica- 

 tions in different instances, so as to de- 

 termine if possible how many are 

 needed. 



With resard to the use of Paris 



