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- Title
Investigations on fungicides.
- Authors
CARTER, G. A.; GARRAWAY, J. L.; SPENCER, D. M.; WAIN, R. L.
- Abstract
SUMMARY The structure/anti-fungal relationships of a group of 137 sulphur-containing compounds were studied by observation of their effects on the mycelial growth of six fungi, Pythium ultimum, Sclerotinia fructigena, Verticillium albo-atrum, Alternaria solani, Botrytis cinerea and Aspergillus niger, and the germination of spores of Botrytis cinevea. These compounds consist of ( a) salts and ( b) carboxy-alkyl and -alkenyl esters of both alkyl- and aryl-substituted dithiocarbamic and hydroxydithioformic acids, (c) certain cyclic derivatives of ( b), and ( d) alkyl and aryl isothiocyanates. Short homologous series were selected to assess the importance of physico-chemical properties in fungitoxicity, whilst certain aryl-substituents were used on the basis of their contrasting electronic effects. Derivatives of alkoxydithioformic acids showed higher toxicity than those of N-alkyl-substituted dithiocarbamic acids, except for a series of β-( N-alkylthio-carbamoylthio)acrylic acids. The fungitoxicity of esters of alkyl-substituted dithiocarbamic or hydroxydithioformic acids showed little change on increasing the size of the alkyl substituent or ester grouping. The fungitoxicity of compounds derived from N-aryldithiocarbamic acids varied considerably with the nature of the N-substituent.
- Publication
Annals of Applied Biology, 1963, Vol 51, Issue 1, p135
- ISSN
0003-4746
- Publication type
Article
- DOI
10.1111/j.1744-7348.1963.tb03681.x