ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Nurmasita Ismail1, Ade Rosmana1 , Sylvia Sjam1 and Ratnawati Ratnawati2
1Plant Pests and Diseases Department, Faculty of Agricurture, Hasanuddin University, Makassar 90245, Indonesia.
2Agrotechnology Department, Faculty of Agriculture, Alkhairaat University, Palu 94221, Indonesia.
J Pure Appl Microbiol. 2020;14(3):1779-1788 | Article Number: 6473
https://doi.org/10.22207/JPAM.14.3.16 | © The Author(s). 2020
Received: 14/06/2020 | Accepted: 12/08/2020 | Published: 17/09/2020
Abstract

Basal bulb rot (BBR) of shallot caused by Fusarium oxysporum f. sp. cepae is one of the highly deleterious diseases on shallot, Allium cepa L. var ascalonicum Backer. in Indonesia. This study aimed to assess the potency of organic mulch, composted plant residues, and endophytic Trichoderma asperellum to control this disease. Treatment with mulch alone, mulch plus compost, mulch plus T. asperellum, and combination of all the three provided the decrease of BBR incidence by 15%, 20%, 29%, and 39% and the increase of shallot productivity by 22%, 66%, 84%, and 125%, respectively. Observation of another treatment impact on the fungal occurrence at harvest time indicated that their population in soil increased by 671%, 771%, 257%, and 814% and the fungal colonization in root tissues mounted by 31%, 77%, 77%, and 74%, respectively. The introduced Trichoderma was found predominantly, especially in leaf tissues of inoculated shallot. These data showed that all the treatments were able to control BBR disease. However, the most effective was the mulch in combination with compost and T. asperellum. Therefore, large-scale disease control could take advantage of this integration.

Keywords

Bulb rot, Compost, Endophytic Trichoderma, Fungal population, Fungal colonization, Mulch

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© The Author(s) 2020. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided 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.