February, 1922. 



SCIENTIFIC AGRICULTURE. 



191 



Plot 3, sprayed with 1-11/^-40 Burgundy 

 on 3rd Sept. and with 3-4-40 Bordeaux on 

 October 19th, after the fruit was picked, 

 4 trees shoAved 2 cankers or an average of 

 Vo ^ canker per tree ; 2 of these trees were 

 absolutely clean. Cheek tree, 4 cankers. 



Plot 4, sprayed with 1-11/^-40 Burgundy 

 on 3rd Sept. and with 6-6-40 Bordeaux on 

 October 19th. The 3 trees examined were 

 absolutely clean. It is interesting to note 

 that these same 3 trees the previous year 

 showed an average of 32 cankers per tree. 

 Cheek tree, 17 cankers. 



Plot 5, sprayed with 1-9 Lime-sulphur on 

 October 19tvli, 4 trees showed 23 cankers or 

 an average of 5% per tree. Check tree, 11 

 cankers. 



Method of Control. 



From the results of the experiments of 

 the past years the following recommen- 

 dations for the control of apple-tree An- 

 thracnose are being made : 



During July and August an endeavor 

 should be macle to go through the orchard 

 and cut out all signs of dead wood. 



On early varieties such as Yellow Trans- 

 parent, Duchess, Wealthy and Gravenstein, 



spray witli 3-4-40 Bordeaux as soon as the 

 fruit is picked and before the Fall rains 

 come. This spray is all that is necessai'y. 



On varieties such as King and Jonathan 

 it is advised to spray the last week in Aug- 

 ust wnth 1-11/2-40 Burgundy and to fol- 

 low this with a 3-4-40 Bordeaux as soon 

 as the fruit is picked. 



On late varieties such as Baldwin and 

 Spy, which will not be harvested until the 

 end of October and not marketed until 

 January, it is advised to spray these the 

 last week in August with a 3-4-40 Bor- 

 deaux and this will be all that is ne- 

 cessary. 



The use of Burgundy for varieties such 

 as King and Jonathan is recommended due 

 to the fact tliat this spray gives very ef- 

 ficient results and leaves no deposit on 

 the fruit which will be harvested probably 

 in October. 



It is felt that this disease can be almost 

 absolutely controlled if growers will only 

 take the matter in hand, and an endeavor 

 is being made on Vancouver Island to 

 eradicate apple-tree Antrachnose from the 

 orchard. 



Fig. 3. — Portion of Experimental Plot of Baldwins, Tanner Brot;. orchard. May, 1919, 

 after three years work. In 1916 the trees were very similar to that illustrated in Fig. 2. 



