THE CANADIAN HORTICULTURIST. 



105 



seem to have failed, such as spraying 

 with sohitions of caustic soda, carbolic 

 acid, or sulphur in water. Some of us 

 in Canada faithfully tried the sulphur 

 several years ago, at the suggestion of 

 Prof. Saunders, without the least effect ; 

 but' we neglected, at least the writer 

 did, to try anotlier remedy which he 

 proposed, and which has since been 

 tried with some success at the experi- 

 ment station at Geneva, N. Y., viz. : 

 spraying the trees w^ith a solution of 

 hyposulphite of soda in water, in the 

 proportion of one pound to ten gallons 

 of water. 



It was ap[)lied on the 5th, 9th and 15th 

 of May, with good i-esults. It was found 

 that the percentage of uninjured fruits 

 on the syringed portions of the trees 

 was much greater than that upon the 

 unsyringed portion ; and also that the 

 fruit was of a larger size. The hypo- 

 sulphite of soda might perhaps be 

 thrown into the barrel of Paris Green 

 water as used for spraying the Codlin 

 Moth, and thus a saving of time and 

 labor be effected. 



We have occupied more space with 

 this subject than we intended, but we 

 hope for pardon because of its import- 

 ance just at this season ; trusting that 

 it may lead our horticulturists generally 

 to experiment carefully with the remedy 

 pi'oposed, and report to us their success 

 or failure, in the interests of one of the 

 most important industries of our Pro- 

 vince. 



SOME INSECTICIDES AND FUNGICIDES. 



For convenience of reference, we 

 mention here a few insecticides, which 

 may be of great service to our readei-s 

 during the coming summer. 



(1) Codlin Moth. — Spray trees with 

 Paris green and water. Mr. James 

 Fletcher, Dominion Entomologist, ad- 

 vises the proportion of one tablespoon- 

 ful to 40 ixals. of water. Paris green 



is a combination of arsenic and copper, 

 and if too strong burns the foliage. 



London purple, which is preferred 

 by some, is an arseniate of lime, is moi-e 

 soluble in water and less poisonous. 

 Prof. Riley prescribes London purple, 

 ^ lb. ; cheap flour, 3 qts. ; water, 40 

 gallons. The flour, and then the pur- 

 ple, are to be washed through a fine 

 sieve, at bottom of an iron funnel. 

 Then add the water. 



Apply just after the flowers have 

 fallen. 



(2) CuECULio. — Spray trees with 

 either of above mixtures. A kerosene 

 emulsion is also commended by Prof. 

 Piley, using kerosene, 2 gals. ; water, 1 

 gal. ; strong soap, -| lb. ' Mix hot and 

 and churn five minutes, then add nine 

 times the quantity of water. 



(3) Caterpillar on Cabbage. — Py- 

 rethrum, or Persian insect powder, ^ 

 oz. to pail of water. This powder is 

 harmless to vegetation, and compara- 

 tively so to human beings. 



(4) Aphis on Cherry, etc. — Pyre- 

 thrum powder, 2 oz. to gal. of water. 



Or kerosene emulsion, as in No. 2. 



(5) Downy Mildew on Grapes. — 

 The following is recommended as the 

 most effective prepai-ation in use, viz., 

 18 lbs. sulphate of copper dissolved in 

 22 gals, of water, mixed with 31: lbs. 

 of lime, dissolved in 6J gals, of water. 

 Apply with a whisk. 



Another and simpler remedy, used 

 with great success in France, is the 

 following : Dissolve 2| lbs. of sulphuret 

 of potassium in 4 gals, of boiling water ; 

 dilute with 40 gals, of cold water and 

 strain. Spray the vines by means of a 

 hand pump before blossoming time. 



(6) Powdery Mildew. — Dust with 

 flour of sulphur on first appearance. 



(7) Grape Rot. — Prof. Scribner, of 

 Washington, advises, as follows : — 

 " Promptly remove, burn or bury all 

 affected berries or leaves. Do this 

 year after year, and the disease may at 



