23 10 月

Antimicrobial effect of rhizome and medicinal herb extract in controlling postharvest anthracnose of dragon fruit and their possible phytotoxicity

2024 年 10 月 23 日
採後處理, 期刊論文, 貯藏病害
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作者： Bordoh, Paa K. ; Ali, Asgar ; Dickinson, Matthew ; Siddiqui, Yasmeen
刊名： Scientia horticulturae
期刊所屬國別：
出版年： 202004
關鍵字： Colletotrichum gloeosporioides
摘要： "•Ginger, turmeric and “dukung anak” extract inhibit the growth of C. gloeosporioides.•Turmeric and “dukung anak” extract at 10.0 g L−1 exhibit fungistatic effect in postharvest management of anthracnose.•Ginger extract at 5.0 g L−1and above exacerbates disease incidence and severity.•Concentrations at 15.0 g L−1 for all plant extracts cause severe disease incidence due to phytotoxicity. A study was conducted to evaluate the antifungal effect of ginger, turmeric rhizome and “dukung anak” (medicinal herb) crude extract against Colletotrichum gloeosporioides (Penz.) Penz. & Sacc.at minimal concentrations 2.5 g L−1, 5.0 g L−1, 7.5 g L−1 and 10.0 g L−1 (in vitro). Additionally, the possibility of using these extracts as an edible coating to control postharvest anthracnose in dragon fruits at maximum concentrations of 5.0 g L−1, 10.0 g L−1 and 15.0 g L−1 (in vivo) were elucidated. The results showed that all plant extracts possessed significant antifungal activity against C. gloeosporioides by inhibiting mycelial growth and conidial germination, and caused distortion, shrinking and swelling of fungal hyphae. Ginger crude extracts at 10.0 g L−1 showed the best effect in vitro by suppressing mycelial growth (88.48 %) and conidial germination (87.50 %) which was comparable to commercial fungicide (Mancozeb) at 2.0 g L−1 (80.45 %). In vivo study showed that all plant crude extract at 15.0 g L−1 compounded disease incidence (DI) and disease severity (DS) due to phytotoxicity. However, using “dukung anak” at 5.0 g L−1 or 10.0 g L−1 significantly controlled anthracnose and this was not different in turmeric-treated fruits at 10.0 g L−1 after 28 days of cold storage at 11 ± 2 °C, 80 % RH. On the contrary, dragon fruits treated with ginger at 5.0 g L−1 and above experienced severe disease incidence due to phytotoxicity. In conclusion, crude extract of dukung anak or turmeric can be used as bio-fungicide to control anthracnose in dragon fruits at 10.0 g L−1, while concentration at 15.0 g L−1 and above may exacerbate diseases in dragon fruits due to phytotoxicity."
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