Journal of Environmental Biology

Influence of Ascophyllum nodosum extract, homobrassinolide and triacontanol on fruit retention, yield and quality of mango

A. Dash¹, D. Samant²*, D.K. Dash¹, S.N. Dash¹ and K.N. Mishra³

¹Department of Fruit Science and Horticulture Technology, Odisha University of Agriculture and Technology, Bhubaneswar-751 003, India

²ICAR-IIHR- Central Horticultural Experiment Station, Bhubaneswar-751 019, India

³Department of Soil Science and Agricultural Chemistry, Odisha University of Agriculture and Technology, Bhubaneswar-751 003, India

*Corresponding Author Email : horti.deepa@gmail.com

Received: 04.06.2020                                                                   Revised: 23.10.2020                                                      Accepted: 09.12.2020

Abstract

Aim: To evaluate the efficacy of foliar application of Ascophyllum nodosum extract, homobrassinolide, and triacontanol for improving fruit retention, yield, and quality in mango.

Methodology: The experiment was laid out in a randomized block design with 10 treatments, comprising Ascophyllum nodosum extract (1000, 3000, and 5000 ppm), homobrassinolide (0.1, 0.3, and 0.5 ppm), triacontanol (1, 3, and 5 ppm), and water as control. Treatments were foliar sprayed at panicle initiation, pea, and marble stages of fruit growth. Observations were recorded on flowering, fruiting, yield, and fruit quality parameters.

Results: All the treatments of Ascophyllum nodosum extract and triacontanol exhibited significant improvement in fruit retention, fruit weight, yield, and fruit quality parameters over control. However, 3000 and 5000 ppm Ascophyllum nodosum extract treatments outperformed all the treatments of triacontanol. Plants sprayed with 5000 ppm Ascophyllum nodosum extract recorded the maximum value for fruit retention (48.15, 36.74, 29.48, and 25.76% at 3, 6, 9, and 12 weeks after pea stage, respectively), number of fruits (133.25 per tree), fruit weight (188.84 g per fruit), and yield (25.16 kg per tree), whereas the lowest values were recorded under control. With respect to fruit quality, 3000 ppm ANE produced the fruits with the highest TSS (19.62 ^°B), whereas the highest TSS/acid ratio was recorded with 5000 ppm ANE (62.29) treatment.      

Interpretation: In mango, foliar application of Ascophyllum nodosum extract (3000-5000 ppm) thrice at panicle initiation, pea, and marble stages of fruit growth is effective for reducing fruit drop and enhancing quantum and quality of produce.

Key words: Ascophyllum nodosum, Biostimulant, Fruit retention, Mango yield, Triacontanol

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