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Screening of sorghum grain biorefinery by-products for growth inhibition of two common postharvest pathogens of mango
conference contribution
posted on 2023-05-23, 12:02 authored by Do, TK, Dann, EK, Roger StanleyRoger StanleyPlants have protective phytochemicals and may also produce phytoalexins in response to fungal attack. Phytochemicals from food waste sources may have potential application as crop protectants. Condensed Distillers' Solubles (CDS) and Dried Distillers' Grains (DDG) are by-products of ethanol production from sorghum grain. This study tested the inhibitory effects of these compounds on growth of two postharvest fungal pathogens of mango, Colletotrichum gloeosporioides (Cg) and Lasiodiplodia theobromae (Lt) using Petri dish growth inhibition assays. The EC50, (Effective Concentration at which mycelial growth is inhibited by 50%), for Cg of CDS was 10.4% v/v of the crude extract. The EC50 of DDG for Cg and Lt was 8.4 and 19.1 mg mL-1, respectively. Mycelial growth of Lt was significantly increased by CDS at 25, 10 and 1% v/v at four and five days after incubation, but after 6 days of incubation there was no significant difference from controls and lower CDS concentrations. We are now testing the sorghum grain biofuel by-products as postharvest treatments and field sprays, to assess their potential in reducing losses by postharvest diseases in commercial horticultural production.
History
Publication title
Acta HorticulturaeVolume
1120Editors
JB Golding, JA Heyes, PMA Toivonen, D Avanzato, R HarkerPagination
219-224ISSN
0567-7572Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
International Society for Horticultural SciencePlace of publication
BelgiumEvent title
XXIX International Horticultural Congress on Horticulture: International Symposia on Postharvest Knowledge for the Future and Consumer and Sensory Driven Improvements to Fruits and NutsEvent Venue
Brisbane, AustraliaDate of Event (Start Date)
2014-08-17Date of Event (End Date)
2014-08-22Rights statement
Copyright 2016 ISHSRepository Status
- Restricted