DIVISION OF HORTICULTURE 



597 



SESSIONAL PAPER No. 16 



boiled was made according to the usual formula, 50 pounds lime, 100 pounds sulphur 

 and 50 gallons water, and boiled for one hour. Water was added from time to time to 

 replace that lost from boiling, keeping the total volume up to 50 gallons. 

 The results obtained at Berwick are as folloAvs : — 



G7-avenstein 



Home-boiled 1-008 s.g 



Commercial 1 • 008 s.g 



Ben Davis. 



Home-boiled 1 -003 s.g 



Commercial 1-009 s.g 



Home-boiled 1-003 s.g 



Commercial 1 • 008 s.g 



It would appear from the foregoing that the j^iagara brand commercial lime sul- 

 phur was preferable to the home-boiled as it controlled scab better. On a block of 

 Kings, however, in tlie same orchard the home-boiled had 21-15 per cent scab, as com- 

 pared with 25-61: per cent on the commercial lime-sulphur plots. 



At Bridgetown the per cent of scab was 27-3 on the home-boiled as compared with 

 17-0 on the coimnercial lime-sulphur plot. 



TIME TO SPRAY. 



In order to get some information as to the time that scab can be controlled to best 

 advantage, in other words the most important spray for the control of apple scab, a 

 series of experiments were made at Falmouth with lime-sulphur arsenate. 



Date of Spraying. p.c. Scah). 



May 9, Mav 20, June 11, June 23, July 14 3-52 



Mav 20, June 11, June 23 20-54 



June 11, June 23, July 14 83-6-3 



No spray 87-35 



The foregoing would indicate that for this season at least the early spray on May 

 9 was the most effective. 



SPUAYIXG EXPERIMENTS FOR THE CONTROL OF APHIS. 



Young trees were used for this experiment. The leaves in many cases were curled, 

 and some of the insects escaped the spray, which accounts for the aphis alive after the 

 different mixtures had been put on. 



The spraying was done August 4, and the trees were carefully examined and 

 records made on August 6. During this period many of the aphis, not touched by the 

 spray, spread over the trees, and had the records been taken earlier a better record as 

 to the relative efficiency of the materials would no doubt have been obtained. 



More definite results would have been secured had the leaves not been curled so 

 that all the insects could be hit with the spray. 



Where the materials recommended for aphis were used with lime-sulphur there was 

 an injury, but unfortunately we had not a check plot sprayed with lime-sulphur alone 

 and cannot tell but that similar injury would have resulted from an application of 



Kentville. 



