National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Anthracnose leaf disease in rubber trees, caused by the attack of Colletotrichum gloeosporioides, have led to the serious decline in natural rubber production. Continuous usage of synthetic fungicide leave the toxic residues that harm the surrounding animals and plants and are not environmentally friendly. It needs a better solution with organic products that are safer, more effective and biodegradable. Piper species could be considered as a source of new natural products with potential antifungal activities. Thus, the research aimed to investigate the effect of leaf extracts from Piper betle, P.porphyrophyllum and P.aduncumin inhibiting the growth of C. gloeosporioides from rubber trees in vitro. Of the three Piper species, the crude methanolic extract of P. porphyrophyllum leaves shows the highest growth inhibition percentage (83.62%), followed by P. aduncum L. (79,38 %), P. betle (76.39%). In further examination on the leaf extract of Piper in various solvents, we find that the n-hexane extract of P.aduncumhas the best performance in inhibiting the growth of C. gloeosporioides (GIP of 92.72%); it also beats the performance of Benomyl, a commercial fungicide, at the same concentration. The 50% percentage of growth inhibition (MIC50) of this n-hexane extract towards C. gloeosporioides is reached at a very low concentration, 32 mg/L, while the MIC90 is reached at concentration of 799 mg/mL. The results suggest that the n-hexane leaf extract of P. aduncum is a potential candidate for anti-Colletotrichum agent.
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