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Evaluation of Muscodor suthepensis strain CMU‐Cib462 as a postharvest biofumigant for tangerine fruit rot caused by Penicillium digitatum

Suwannarach, Nakarin, Bussaban, Boonsom, Nuangmek, Wipornpan, Pithakpol, Wasna, Jirawattanakul, Bantoon, Matsui, Kenji, Lumyong, Saisamorn
Journal of the science of food and agriculture 2016 v.96 no.1 pp. 339-345
Muscodor, Penicillium digitatum, biofumigation, endophytes, fruits, fungi, inoculum, mycelium, pathogens, plant rots, rye, tangerines, total soluble solids, volatile compounds, weight loss
BACKGROUND: This study investigated both the in vitro and in vivo biofumigant ability of the endophytic fungus Muscodor suthepensis CMU‐Cib462 to control Penicillium digitatum, the main cause of tangerine fruit rot. RESULTS: Volatile compounds from M. suthepensis inhibited mycelial growth of the pathogen. The most abundant compound was 2‐methylpropanoic acid, followed by 3‐methylbutan‐1‐ol. They showed median effective doses (ED₅₀) on P. digitatum growth of 74.91 ± 0.73 and 250.29 ± 0.29 µL L⁻¹ airspace respectively. Rye grain was found to be a suitable solid medium for M. suthepensis inoculum production. The results indicated that mycofumigation with a 30 g rye grain culture of M. suthepensis for 12 h controlled tangerine fruit rot. The percentage weight loss and soluble solids concentration of fumigated tangerines were similar to those of non‐infected and non‐fumigated fruits. CONCLUSION: Muscodor suthepensis has potential as a biofumigant for controlling postharvest disease of tangerine fruit. © 2015 Society of Chemical Industry