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Problem statement: Plant derived fungicides are now being subjects &#13; of many research groups. These secondary metabolites have enormous potential to &#13; inspire and influence modern agrochemical research. The study aimed to investigate &#13; the antifungal activity and their potential use as fungicides in the agriculture &#13; of crude extracts and purified compounds derived from plants used in traditional &#13; medicines. Approach: Four medicinal plants including A. galanga, &#13; C. longa, B. pandurata and C. odorata were selected and percolated with hexane, &#13; ethyl acetate, acetone or methanol. The extracts were purified and elucidated &#13; their chemical structures. Disc mycelial growth inhibition was applied in order &#13; to determine their anti P. capsici activity and the field study was performed &#13; to determine their potential use in controlling fungal infection in chili plants &#13; compared with commercial fungicides such as captan and bio-control Trichoderma &#13; virens. Results: All crude extract inhibited mycelial growth &#13; of the fungus performed with similar efficacy. ED90 was equal to 300 ppm. Among &#13; plants studied B. pandurata was the most potent against P. capsici. The proposed &#13; active ingredients were pinostrobin and pinocembrin. In the field study, pinocembrin &#13; mediated the same anti P. capsici activity as captan. B. pandurata can protect &#13; chili from infection, thus increasing crop yield of chili comparable to Trichoderma &#13; virens. Conclusion: The results clearly showed that the extracts &#13; of the four plants studied could be considered as potential sources of novel fungicides. &#13; Particularly, B. pandurata has a very high potential as raw material for developing &#13; the antifungal molecule of non-petrochemical, naturally eco-friendly, easily obtainable &#13; and not toxic to human beings and environment, at least for use in chili growing

american journal of agricultural and biological sciences

Anti-Phytopthora capsici Activities and Potential Use as Antifungal in Agriculture of &lt;i&gt;Alpinia galanga&lt;/i&gt; Swartz, &lt;i&gt;Curcuma longa&lt;/i&gt; Linn, &lt;i&gt;Boesenbergia pandurata&lt;/i&gt; Schut and &lt;i&gt;Chromolaena odorata&lt;/i&gt;: Bioactivities Guided Isolation of Active Ingredients