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Toxicity of catechol to alternaria spp

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Abstract

In slide-germination tests concentration of 50 p.p.m. or more of catechol were inhibitory to spore germination ofAlternaria tomato, A. solani, A. melongenae, A. longipes, A. brassicicola. A. brassicae, A. raphani, A. triticina and anAlternaria sp. isolated from onion. More than 70 % inhibition of conidial germination was caused by 100 p.p.m. of the compound. Nearly complete or complete inhibition occurred in 200 and 500 p.p.m. Elongation of germ tubes was similarly affected. A 3-minute dip in 500 p.p.m. catechol solution did not affect the germinability of seeds of radish, cabbage, cauliflower and knol kohl. Similar treatment of radish seeds reduced the seed-borne inoculum ofA. raphani from 42 % to 1 %. In one preliminary experiment, radish seedlings raised from treated seeds, appeared to be resistant to artificial inoculation withA. raphani.

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Authors and Affiliations

  1. U.P. Agricultural University, Pantnagar, Naini Tal, India

    R. S. Singh (Associate Professor) & H. S. Chaube (Senior Research Assistant)

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  1. R. S. Singh
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  2. H. S. Chaube
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Journal Series Paper no. 100 from U.P. Agricultural University Experiment Station.

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Singh, R.S., Chaube, H.S. Toxicity of catechol to alternaria spp. Mycopathologia et Mycologia Applicata 44, 373–378 (1971). https://doi.org/10.1007/BF02052711

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  • DOI: https://doi.org/10.1007/BF02052711

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