Fungicidal Potential of Essential Oils in Organic Corn Grains during Storage
- DOI
- 10.2991/978-94-6463-282-8_11How to use a DOI?
- Keywords
- Essential oils; Mold growth inhibition; Organic corn grains; Storage
- Abstract
Mold and mycotoxin contamination of cereal grains not only affect human and animal health but also have a significant economic impact on cereal growers and food processors due to grain loss and product recall. Synthetic fumigant is usually used to control mold growth during grain storage, but it is not permitted for organic grains. Therefore, the objective of this study was to investigate the antifungal potential of some essential oils (EOs) for organic corn grain protection at storage temperature 25 and 35°C and water activities 0.85 and 0.9 by a simulated fumigation method. A 4x2x2 experimental design was used. The three factors were the types of EOs (cinnamon, clove, oregano and thyme oils), storage temperature (25 and 35°C) and water activity (aw) (0.85 and 0.9). Organic corn grains were weighed into a set of glass jars and adjusted to the desired water activity (aw). EOs were diluted to 10% using 10% DMSO, 0.5 mL diluted EO was added to a cotton ball taped to the lid. The jars were capped immediately and stored at the desired temperature for 7-35 days. Samples treated with fungicide Pyraclostrobin and 10% DMSO were used as positive control and negative control, respectively. Mold growth was monitored every 7 days by photographing and aflatoxins in the samples were determined by ultra-high-performance-liquid-chromatography (UPLC). The study found that the mold growth and aflatoxin contents of corn grains were affected by the type of EO, storage temperature and moisture or water activity. At 25°C and aw=0.85, the negative control was molded at day 28, while others were not molded; aflatoxin B1 and B2 were almost unchanged in positive control and cinnamon oil treated samples; aflatoxin G1 and G2 were below the detection limit in positive-control and EO-treated samples. At 35°C, the negative-control was molded in 7 days at aw=0.9 and 14 days at aw=0.85, while samples treated with fungicide and cinnamon oil were not molded until day 28 and 35, respectively. The lowest aflatoxin B1 concentration was detected in the samples treated with cinnamon oil, oregano oil and positive control. The results indicated that cinnamon oil and oregano oil at a concentration 0.4 mL/100g corn grains have great potential to replace toxic fumigants to protect organic grains from mold and mycotoxin contamination during storage.
- Copyright
- © 2023 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
Cite this article
TY - CONF AU - Jianmei Yu AU - Esther Iwayemi AU - Ivana Pedroso AU - Nona Mikiashvili PY - 2023 DA - 2023/11/22 TI - Fungicidal Potential of Essential Oils in Organic Corn Grains during Storage BT - Proceedings of the National Conference on Next-Generation Sustainable Technologies for Small-Scale Producers (NGST 2022) PB - Atlantis Press SP - 83 EP - 93 SN - 2468-5747 UR - https://doi.org/10.2991/978-94-6463-282-8_11 DO - 10.2991/978-94-6463-282-8_11 ID - Yu2023 ER -