Efficacy of Essential Oils from Plants in Controlling Leaf Spot Disease of Cabbage Seedlings

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Published: Sep 2, 2020
Keywords:
cabbage Alternaria leaf spot Alternaria brassicicola essential oil, control

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Anongnat Taechuesai
Department of Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
Sombat Srichuwong
Department of Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand

Abstract

Cabbage seeds cv. No. 1, New Jersey and Ruby Perfection were investigated for  Alternaria brassicicola, which causes leaf spot disease, using the Blotter method. Alternaria brassicicola was found in cv. New Jersey more than in the others, viz. in 15.50%.  Efficacy test of essential oils extracted from 11 species of plants, in growth inhibition of A. brassicicola mycelia was carried out on PDA mixed with the essential oils. It was found that the oils from Cymbopogon narus, Litsea cubeba, Mentha piperita and Cinnamomum camphora at 1,000 - 2,000 ppm gave 100% inhibition. The essential oils from C. narus and L. cubeba gave similar results in reducing seed infection and increase percentages of seed germination, seedling emergence, normal seedling development, shoot length, fresh and dry weight.

Article Details

Issue
Vol. 21 No. 2 (2005): Journal of Agriculture (May-August)
Section
Research Articles

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