742 



EXPERIMENTAL FARMS 



Dormant versus no Dormant. 



7 GEORGE V, A. 1917 



Number of 

 Experiments. 



Summary. 



Per cent. 

 Scab. 



2 Dormant spray. . . . 



6 



4 " '< 



2 " " 

 9 No Dorniant spray 

 11 No spray 



1-932 sp. gr. 

 1-028 

 1-014 

 1-008 " 



or 1 to 9 2 gals, and four sprays 1-OOS. 



1 " 10| " " 1-OOS. 



1 " 21 " " 1-008. 



1 " 37 " " 1-OOS. 



1-008. 



Different Strengths in the first Foliage Spray, 



1 First foliage spray 1-014 sp. gr., 1 to 21 gals, and three spravsl 



1 " " 1010 " 1 " 30 " " 1 



1 " " 1-009 " 1 " 37 " " 1 



1 " " 1-008 " 1 " 37 " " 1 



1 " " 1007 " 1 " 43 " " 1 



Average of above five sprays „ 1 

 7 No first foliage spray. 

 11 No spray. 



4-1 

 7-4 

 5-2 

 5-3 

 7-13 

 ■95 



/{ 



■OOS 

 -008 

 -008 

 ■008 

 -008 

 -008 



3-6 



110 



3^5 



9-5 



4-9 



6-5 



13-94 



78-95 



SPRAYING AT DIFFERENT DATES. 



In order to gather further information as to the value of the early sprays as com- 

 pared with the later ones a series of tests in which the plots were sprayed twice before, 

 and twice after the blossoms, were compared with those sprayed once before the blos- 

 soms aiid twice after. 



In one series of experiments the one spray before the blossoms was put on about 

 midway between the first spray, which was put on just after the leaf buds were nicely 

 opened May 17, and the second spray put on just before the first petals opened May 31, 

 or just before or about the time the blossom clusters were showing pink, this we have 

 called a midway spray. 



In the other test the one spray before blossoms was put on just before the petals 

 of the flower clusters opened. 



It will be noticed from the summary of the lime-sulphur-arsenate plots below 

 that there was a difference of from two to three per cent only in favour of two sprays 

 before the blossoms and that the two most important sprays were the ones just before 

 and just after blossoming. From results obtained it would seem that should the period 

 between the opening of the leaf buds and the opening of the petals of the flower clus-. 

 ters be short owing to weather conditions one spray may be sufficient to give practi- 

 cally clean fruit, but should this period be extended two sprays should be given. 



A study of results from the soluble sulphur plots sprayed at different dates as 

 shown by the summary indicates that the early spray was quite an important one and 

 that two applications before the blossoms were advisable. It is interesting to note also, 

 that on the day following the application of the midway spray at Berwick there was a 

 sharp rainfall of about one-quarter inch as was the case with the spray after blossoming 

 which would show that soluble sulphur is not an adhesive spray and that a heavy quick 

 rainfall may reduce its fungicidal value and bring about increased burning also, as was 

 the case with these sprays. 



It would seem, therefore, that from our present knowledge it is wise to make two 

 applications before blossoms; first after the leaf buds open, and second just before the 

 blossoms open which dates correspond with those advised for the best control of insects. 



Kentville. 



