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The fungicidal properties of certain spray-fluids. III

  • E. Horton (a1) and E. S. Salmon (a1)

Extract

The following solutions were tested with respect to their fungicidal properties towards the “powdery,” conidial stage of S. Humuli on young hop-leaves in the greenhouse:

(1) Disodium arsenate, containing 0·096 per cent. As2O5 proved fungicidal and killed also patches of leaf-cells underlying the mildewpatches, but did not otherwise injure the leaf. A solution containing 0·02 per cent. As2O5 was fungicidal without killing any leaf-cells.

(2) Trisodium arsenate containing 0·077 per cent. As2O5 proved fungicidal.

(3) Dicalcium arsenate. containing 0·048 per cent. As2O5 proved fungicidal; containing 0·024 per cent. As2O5 the solution was apparently just fungicidal, but with 0·01 per cent. As2O5 the solution was practically non-fungicidal.

(4) Tricalcium arsenate containing 0·076 per cent. As2O5 is fungicidal; containing 0·02 per cent. As2O5 it possesses some fungicidal value, but with 0·01 per cent. As2O5 it is practically non-fungicidal.

(5) The following constituents of lime-sulphur wash proved nonfungicidal: calcium sulphate, sulphite, thiosulphate, hydroxyhydrosulphide.

(6) Calcium polysulphide, at a strength of 0·11 per cent., proved fungicidal.

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References

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(1)Eyre, J. V. and Salmon, E. S.The Fungicidal Properties of Certain Sprayfluids (Journ. Agric. Science, 7, 473507 (1916)).
(2)Eyre, J. V., Salmon, E. S. and Wormald, L. K.The Fungicidal Properties of Certain Sprayfluids (Journ. Agric. Science, II (l.c. 9, 284307 (1919)).
(3)Waite, M. B.Experiments on the Apple with some New and Little-known Fungicides (U.S. Dept. Agric. Circ. 58 (1910)).
(4)Clinton, G. P.Tests of Summer Sprays on Apples, Peaches, etc. (Connecticut Agric. Exper. Station, Thirty-fifth Ann. Rep. 1911, 347406 (1912)).
(5)Watkins, O. S.Teste of Lime-Sulphur, Bordeaux mixture and other Sprays (Illinois Stale Circ. 159 (1912)) (Abstr. in U.S.A. Dept. Agric. Exper. Stat. Record, 28, 48 (1913)).
(6)Wallace, E., Blodgett, F. M. and Hesler, L. R.Studies of the Fungicidal Value of Lime-Sulphur Preparations (Agric. Exper. Stat. Cornell Univ. (New York) Bull. 290 (1911)).
(7)Morse, W. J.Spraying Experiments and Studies on Certain Apple Diseases in 1913 (Maine Stat. Bull. 223) (Thirtieth Ann. Rep. Mains, Agric. Exper. Stat. 1914, 124 (1914)).
(8)Morse, W. J. and Shapovalov, M.Apple Spraying Experiments in 1914 (Maine Stat. Bull. 240) (Thirty-first Ann. Rep. Maine Agric. Exper. Stat. 1915, 177196).
(9)Morse, W. J.Arsenate of Lead as a Fungicide for Apple Scab (Phytopathology, 6, 118 (1916)).
(10)Morse, W. J.Apple Spraying Experiments in 1916 and 1917 (Maine Stat. Bull. 271) (Thirty-fourth Ann. Rep. Maine Agric. Exper. Stat. 1918, 101128).
(11)Sanders, G. E.Arsenate of Lead vs. Arsenate of Lime (Proc. Entomol. Soc. Nova Scotia, 1916, 4045 (1917)).
(12)Blair, J. C.et alii. Field Experiments in Spraying Apple Orchards. General Summary by B. S. Pickett (Univ. of Illinois Agric. Exper. Stat. Bull. 185 (1916)).
(13)Vermorel, V. and Dantony, E.Sur les bouillies fongicides mouillantes (C. R. 156, 1475–1476 (1913)).
(14)Van Slykk, L. L., Hedges, C. C. and Bosworth, A. W.A Chemical Study of the Lime-Sulphur Wash (N. Y. Agric. Exper. Stat. Bull. 319 (1909)).
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(18)Bodnar, J.Chemische Zusammensetzung und Wertbestimmung von Schwefelkalkbrühe (Chem. Zeit. 39, 715 (1915)).
(19)Chapin, R. M.The Chemical Composition of Lime-Sulfur Animal Dips (U.S. Dept. Agric. Bull. 451 (1916)).
(20)Salmon, E. S. and Horton, E.Lime-Sulphur and Calcium Caseinate as a Fungicide (Journ. Min. Agric. 28, 995999 (1922)).

The fungicidal properties of certain spray-fluids. III

  • E. Horton (a1) and E. S. Salmon (a1)

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