<em>In vitro</em> study of selected essential oils against <em>Colletotrichum</em> sp. and <em>Lasiodiplodia</em> sp. causing postharvest diseases in papaya
Anthracnose caused by <em>Colletotrichum</em> sp. and stem-end rot (SER) caused predominantly by <em>Lasiodiplodia</em> sp. are common postharvest diseases affecting papaya in Sri Lanka and are currently managed by synthetic chemicals which are hazardous. Use of essential oil...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Faculty of Science, University of Peradeniya, Sri Lanka
2020-11-01
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| Series: | Ceylon Journal of Science |
| Subjects: | |
| Online Access: | https://cjs.sljol.info/articles/7806 |
| Summary: | Anthracnose caused by <em>Colletotrichum</em> sp. and stem-end rot (SER) caused predominantly by <em>Lasiodiplodia</em> sp. are common postharvest diseases affecting papaya in Sri Lanka and are currently managed by synthetic chemicals which are hazardous. Use of essential oils (EOs) is considered a non-hazardous alternative. This <em>in vitro</em> study investigated the antifungal potential of selected EOs against anthracnose and SER pathogens isolated from papaya var. ‘Red Lady’.A poisoned food bioassay was carried out to evaluate the antifungal effect of EOs (Cardamom, citronella, orange, mustard and lemon). Colony diameter was taken as a measure of growth. Bioassays consisted of EOs at 500, 750, 1000 μl l<sup>-1</sup> with untreated control, three replicates and three separate trials. Cardamom (1000 μl l<sup>-1</sup>) and citronella (750 μll<sup>-1</sup>) significantly (P<0.05) inhbited <em>Colletotrichum</em> sp. and <em>Lasiodiplodia</em> sp. from papaya. According to GC-MS, higher percentages of antifungal geraniol, geranyl acetate are present in citronella while a-terpinyl acetate, 1, 8-cineole are present in cardamom oil. |
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| ISSN: | 2513-2814 2513-230X |