DIVISION OF HORTICULTURB 



757 



SESSIONAL PAPER No. 16 



DRY AND PASTE ARSENATE OF LEAD WITH LIME AND SOLUBLE SULPHUR. 



In general we are safe in drawing the following conclusions : — 



1. The spray before the leaves open is not likely to give results sufficiently great 

 to pay for its application. 



2. Two foliage applications before blossoming are desirable and that more care 

 should be given to thoroughly protect the foliage up to this time. 



3. Two thorough sprays before blossoming followed by two after will give prac- 

 tically clean fruit. 



4. The 1-008 specific gravity test strength of lime-sulphur is sufficiently strong 

 to control scab and that a greater strength is a waste and may cause foliage injury 

 and possibly a loss of fruit from burning. 



5. Any of the well-established brands of arsenate of lead seems to give equally as 

 good results when used in lime-sulphur. 



6. Lime-sulphur alone is nearly as good a fungicide as lime-sulphur-arsenate. 



7. Owing to insect injury the arsenate cannot be safely omitted from the spray. 



8. Lime-sulphur is equally as good as Bordeaux for scab control. 



, 9. 'The greatest objection to Bordeaux is the russeting of the fruit, which if 

 bad will reduce the grade. 



10. The home-made concentrated is as effective for scab control if used at the 

 same specific gravity test as the commercial concentrated. 



11. In all tests with soluble sulphur-arsenate the scab control has not been as 

 good as with, lime-sulphur arsenate. 



12. Soluble sulphur-arsenate is liable to cause serious foliage injury. 



13. Soluble sulphur alone without arsenate of lead is not so good a fungicide 

 evidently due to the arsenate rendering it more adhesive. 



14. Barium chloride is of no practical value for lessening foliage injury when 

 added to soluble sulphur-arsenate. 



15. A strength of soluble sulphur IJ pomids to 100 gallons is apparently about as 

 good 'a fungicide as that of a greater strength and^ the stronger spray is liable to 

 cause more injury. 



16. Owing to the injury liable to result we consider-lime-sulphur-arsenate prefer- 

 able to soluble sulphur-arsenate. 



ORCHARD HEATING. 



Nearly all fruit growing sections from time to time suffer some loss from spring 

 frosts killing the fruit during the blossoming period. Such frosts are usually of short 

 duration, and generally are confined to one night but damage may result from a low 

 temperature of only a few hours during the early morning 



Kentville. 



