1922.] 



LiiiE-SrLPHi r as a Fungicide. 



999 



apple " scab ?? also, a way may possibly be found to avoid the 

 serious injuries produced by lime -sulphur at higher strengths 

 on the apple and gooseberry. 



Summary. — In carefully controlled experiments it has been 

 found that Knie-sulphur at a strength of 1.003 sp. gr. (1 gal. of 

 the concentrated wash (1.30 sp. gr.) to 99 parts of water) and 

 containing 0.16 per cent, of polysulphide sulphur., is lethal for 

 the " powdery " conidial stage of the hop-mildew.* when the 

 lime-sulphur is used with calcium casemate in order to secure 

 complete wetting of the fungus. 



It is considered probable that lime-sulphur at this strength 

 and mixed with calcium casemate will be found lethal for the 

 American gooseberry-mildew also (and other " powdery mil- 

 dews " « and that at this dilution hme-sulphur may be used on 

 ripening dessert gooseberries without fear of disfiguring the fruit 

 for market. 



Bibliography. 



L Salmon, E. S. — A Lime- Sulphur Wash for use on Foliage (Jour. Board of 

 Agric. XY1X 184 (1910)). 



2. Idem. — Spraving Experiments with a Lime-Sulphur Wash {Jour. Board 



of Agric. XYLT. SSI (1911)). 



3. Idem. — Lime-Sulphur Wash for use on Gooseberries (I.e. XIX. 99 (1912)). 



4. Idem and Wright, C. W. B. — Lime- Sulphur Wash for American Goose- 



berry-mildew (he. XIX. 994 (1913)). 



5. Idem. — American Gooseberry-mildew 'I.e. XX. 1057 (1914)). 



6. Idem aDd Eyre. J. V. — A Xew Fansricide for use against American 



Gooseberry-mildew (l.c XXTT. ^lllS (1916)). 



7. Idem, idem and Wormald, L. K. — Further Xotes on the Powdery Mildews 



and the Ammonium Polysulphide Wash (I.e. XXV, 1494* ■ 1919V). 

 S. Idem, idem and idem. — The Ammonium Polvsulphide Wash (I.e. XXYI, 

 S21 ,1919)). 



9. Grubb. X. H. — Tests of Fungicides on Apple-trees (Jour, of Pomology, 

 II. 93 (1921)). 



10. Idem.— The Spraving of Apples *Gard. Chron.. LXX. 326 (1921)). 



11. Eyre. J. P.; Salmon, E. S.. and Wormald. L. K— The Fungicidal 



Properties of certain Sprav Fluids, II [Jour. Agric. Science, 

 TX. 2S3 (1919)). 



12. Peterson. A. — Some Xotes on the Spreading Quality of various Contact 



Spravs (Report. Xew Jersev Aerie. Exper. Station. 191S-19. 

 p. 42$ 1920)). 



13. Salmon. E. S — The Growing of Clean Fruit (Jour. Roy. Hort. Soc, 



XLY. 70 (1919)). 



* It must be minted out that under practical conditions "flowers of 

 sulphur," and n< t lime-sulphur, is to be recommended for use against hop- 

 mildew. (See Salmon, E. S., "Hop-mould and its Control," (Jour. Min* 

 Agric, May, 1921. p. 150).) 



