Abstract
THE fungicides captan (N-(trichloromethylthio)tetra-hydrophthalimide) and phaltan (N-(trichloromethylthio)-phthalimide) are about equally toxic to Alternaria tennis Nees and Neurospora crassa Shear and Dodge1, but differ in toxicity to powdery mildews. Captan, for example, fails to control apple mildew (Podosphaera leucotricha (Ell. and Everh.) Salm.), but phaltan has been reported2,3 to be effective against rose mildew (Sphaerotheca pannosa (Fr.) Jaczew.). This difference in effect is surprising because both fungicides contain the —SCCl3 group which is generally considered to be responsible for the toxicity of captan1, and the —CO.NX.CO— grouping which has also been suggested as a toxophore4. Powdery mildew spores have a high lipid content5 and phaltan is more fat-soluble than captan1. The greater toxicity of phaltan to powdery mildews may therefore be due to easier penetration into the spores.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Richmond, D. V., and Somers, E., Ann. appl. Biol., 50, 33 (1962).
Palmer, J. G., Henneberry, T. J., and Taylor, E. A., Plant Dis. Reptr., 43, 494 (1959).
Deep, I. W., and Bartlett, A., Plant Dis. Reptr., 45, 628 (1961).
Horsfall, J. G., Principles of Fungicidal Action (Chronica Botanica Co., Waltham, Mass., 1956).
Yarwood, C. E., Amer. J. Bot., 37, 636 (1950).
Skerrett, E. J., and Baker, E. A., Analyst, 87, 228 (1962).
Yarwood, C. E., Proc. Second Int. Congr. of Crop Protection, 500 (1951).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
RICHMOND, D., SOMERS, E. & ZARACOVITIS, C. Toxicity of Captan Analogues to Oat Powdery Mildew. Nature 204, 1329–1330 (1964). https://doi.org/10.1038/2041329a0
Issue Date:
DOI: https://doi.org/10.1038/2041329a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.