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Eco-friendly Management of Postharvest Decay of Langra and Surjapuri Mangoes

Rumana Khan Muna
Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Mst. Arjina Akter
Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Mohammad Shahjahan Monjil
Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

Mahogani leaf extract, bishkatali leaf extract, garlic clove extract, brine solution and fruit washing were applied to investigate the efficacy for eco-friendly management of postharvest decay of Langra and Surjapuri varieties of mango. Chemical fungicide Bavistin (Carbendazim 50% WP), and nontreated control were used as positive and negative control treatments, respectively. Post-harvest decay caused by anthracnose and stem-end rot of mango were assessed. At 8th day of storage of Langra, lowest number of anthracnose spots were found in garlic clove extract followed by bishkatali. Significant reduction in anthracnose spots were observed in the treatments mahogani, fruit washing, Bavistin and brine solution, respectively. The lowest diseased area caused by anthracnose were found in Bavistin followed by garlic. The lowest number of stem-end rot lesions were found in mahogani followed by garlic and significantly reduced percentage of stem end rot lesions were observed in the treatments brine solution followed by Bavistin and bishkatali. In case of Surjapuri mango, the lowest number of anthracnose spots per fruit and disease area per fruit were obtained by garlic clove treatment. The lowest number of stem-end rot lesions was observed with bishkatali and mahogani leaf extracts, respectively and lowest stem-end rot diseased area per fruit was observed with garlic clove and mahogany leaf extracts, respectively. Overall higher number of anthracnose spot and stem-end-rot lesions per fruit was observed in control treatment. Garlic clove extract, bishkatali leaf extract and mahogani leaf extract were found effective in reducing post-harvest decay of mango.

Keywords: Mango, Post-harvest, Ecofriendly management, Langra, Surjapuri, Plant extract, Anthracnose, Stem-end rot of mango

Location: Microbiology and Bio-Control Laboratory, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date:

End Date:

Program Area: Postharvest and Agro-processing

Commodity: Mango

Objectives:

To manage the postharvest decay of Langra and Surjapuri varieties of mango by applying plant extracts.

Methodology:

The experiment was carried out in Microbiology and Bio-Control Laboratory, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh. The two mango varieties were – i. Langra and ii. Surjapuri. Healthy and diseased fruits of different varieties were collected from local market. The experiment was laid out in Completely Randomized Design (CRD) with three replications. For the management of postharvest decay of mango, different treatments were used like T₁ = Mahogani (Swietenia mahogany) leaf extract (1:10), T₂ = Bishkatali (Polygonum hydropiper) leaf extract (1:10), T₃ = Garlic (Allium sativum) clove extract (1:10), T₄= Brine solution (1:100), T₅ = Fruit washing, T₆ = Bavistin (0.1%) and T₇ = Control. Fruits were randomly selected from each variety of the experimental fruit lot. The selected fruits were then individually dipped in Garlic clove extract, Mahogani and Bishkatali leaf extract, Brine solution, water and Bavistin, respectively. The fruits were then air dried by using normal ceiling fan and placed on the table of the laboratory at spell out condition for observation. For control treatment, the fruits were then air dried by using normal ceiling fan without applying any extracts and chemical. Data on the following parameters were recorded from all the experimental fruits: i. Number of spots per infected fruit: the fruits which had spots on the surface were considered as infected fruits and after treatments this number of spots was counted. ii. Disease area in percentage per infected fruit: after treatments, disease area per infected fruit was counted and was expressed in percentage.

Source of Information: J Bangladesh Agril Univ 18(1): 34–39, 2020

Article Link (Online Journal): https://doi.org/10.5455/JBAU.94732

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the findings from the present study it may be concluded that significant variations existed among the different postharvest treatments with different plant extracts in respect of diseased spots and diseased area. Highest disease occurrence was observed in control treatment. Among the plant extracts, garlic clove extract treatment effectively reduced the post harvest decay of mango. In comparison with control treatments, leaf extracts of mahogani, bishkatali and garlic are effective to reduce post harvest decay of mango. Even fruit washing with water is effective to control the post harvest diseases of mango.

Knowledge Management: Journal