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Effect of Ethrel on Year Round Production of Jackfruit

M. Nazirul Islam
Principal Scientific Officer
HRC, BARI, Gazipur 1701

Abstract/ Executive Summary:

An experiment was conducted at Horticulture Research Centre, BARI, Gazipur during the period from July 2010 to May 2011 to find out the effect of foliar application of ethrel on year round production of jackfruit. Branches of 8 year old 5 Jackfruit trees were sprayed with 250, 500, and 700 ppm ethrel and water as control in first week of July 2010. Branches sprayed with 500 and 750 ppm ethrel prompted to flower from September 2010. Foliar application of ethrel 500 and 750 ppm induced both male and female flower in 15 September to 15 November 2010. Female flower was initiated 2-3 months earlier than nor mal season. While, no female flowers appeared until 15 January, 2010 in untreated control. Application of 500 and 700 ppm ethrel induced female flower in October but fruit set was not occurred. Female flowers appeared in normal season, found to set fruit. The result was concurrent to the findings of Nunez Elisea et al. (1980) who reported that ethrel (48% ethephon) @ 1000 p.p.m. 3 times at 2 week intervals, starting 1 month before the initiation of flowering of jackfruit.

Keywords: Ethrel, Year round production, Jackfruit

Location: Horticulture Research Centre, BARI, Gazipur

Start Date: 01-06-2010

End Date: 31-05-2011

Program Area: Knowledge Management

Commodity: Jackfruit

Objectives:

To find out the effect of foliar application of ethrel on year round production of jackfruit

Methodology:

The study was conducted at the Horticulture Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur during July 2010 to June 2011. Four concentration of Ethrel viz, 500 ppm (T₁), 750 ppm (T₂) and 250 ppm (T₃) and Control (T₄) were applied on individual Jackfruit tree on 15 July 2010.. Plant was kept under closed supervision after application of treatments. Date of flowering, days to fruit set, number of male and female flower, date of harvesting, and data on fruit quality (weight and size of size, TSS%) were recorded. Collected data were summarized for interpretation.

Source of Information: Research Report on Horticultural Crops 2011-12. Horticulture Research Centre, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 25000/-

Total Budget (Tk.) : 25000/-

Achievement/Findings:

From this experiment it was found that there was no significant effect of ethrel on year round production in jackfruit. But application of 500 and 700 ppm ethrel induced female flower in 15 September to 15 November. While, no female flowers appeared until 15 January in untreated control. It was concluded that branches sprayed with 500 and 750 ppm ethrel prompted to flower 2-3 month earlier than normal season. Female flower of treated branches failed to produced fruits, fruits was observed from female flower of January which was normal flowering season of jackfruit.

Knowledge Management: Report/Proceedings