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Selection of Resistant Variety, Effective Organic Amendment and Fungicide Against Gummy Stem Blight (didymella Bryoniae) of Bottle Gourd

M. Afroz
Bangladesh Agricultural Research Council (BARC), Dhaka, Bangladesh

M. A. Rahman
Bangladesh Agricultural Research Council (BARC), Dhaka, Bangladesh

M. S. Nahar
Bangladesh Agricultural Research Council (BARC), Dhaka, Bangladesh

L. Yasmin
Bangladesh Agricultural Research Council (BARC), Dhaka, Bangladesh

S. M. K. Alam
Bangladesh Agricultural Research Council (BARC), Dhaka, Bangladesh

Abstract/ Executive Summary:

Gummy stem blight caused by Didymella bryoniae (Mycosphaerella melonis) of bottle gourd (Lagenaria siceraria) is one of the destructive diseases of the vegetable crop in Bangladesh. The present investigation was conducted under natural epiphytotic condition to find out resistant variety, effective organic amendment and chemical fungicide against the disease. Out of 23 accessions of bottle gourds screened in the investigation only BARI (Bangladesh Agricultural Research Institute) Lau-2 showed resistant reaction, while BARI Lau-1 showed moderate resistant reaction and the rest of the lines were moderately susceptible or susceptible to the disease. Soil amendment with poultry liter or mustard oilcake and application of Bordeaux paste at early stage of crop growth was recorded as the best chemical for controlling gummy stem blight of bottle gourd showing 91.93% disease reduction at seedling stage. On the other hand, foliar spray with Indofil M-45 (0.2%) was found effective to control D . bryoniae at the later stages of plant growth showing 44.60% reduction in disease severity. Bottle gourd yield increased by 39.77-53.70% over control due to foliar spray of different fungicides. Based on findings of the investigation, cultivation of BARI Lau-1 and BARI Lau-2, use of Bordeaux paste and foliar spray with Indofil M-45 may be recommended to control gummy stem blight for higher bottle gourd yield.

Keywords: Gummy stem bight, Bottle gourd, Chemical control, Resistant variety

Location: Experimental field, Bangladesh Agricultural Research Institute (BARI), Gazipur

Start Date: 00-00-2008

End Date: 00-00-2010

Program Area: Pest Management

Commodity: Bottle gourd, Diseases and insects

Objectives:

To select resistant variety, effective organic amendment and chemical fungicide against gummy stem blight of bottle gourd (D. bryoniae) with a view to developing suitable control measures of the disease under natural epiphytotic and field conditions.

Methodology:

Three independent experiments were conducted during the cropping seasons of 2008, 2009 and 2010 to screen bottle gourd accessions resistant against gummy stem blight, and to find out the effect of organic soil amendments and Bordeaux paste, and foliar spray with chemical fungicides on the severity of the disease. All experiments were conducted in the experimental field of Bangladesh Agricultural Research Institute (BARI), Gazipur under natural epiphytotic conditions following randomized complete block design with four replications. Bottle gourd was grown following standard methods. Seedlings were grown in poly bags individually. Twenty five days old seedlings were then transplanted in the experimental plots with unit plot size 3m X 2m raised beds. Each bed contained 20 seedlings. Line to line and plant to plant distance were maintained 60 cm. and 50 cm. respectively. Cow dung was applied @ 15 t ha^-1 . Triple supper phosphate, urea and muriate of potash were applied @ 175, 175 and 150 kg ha^-1 , respectively, as recommended for the crop (Anon., 2005). The intercultural operation and irrigation were done in time. Statistical analysis of the data of experiment 2 and 3 was performed using MSTAT computer program. The data on disease severity was analyzed after necessary transformation.

Source of Information: SAARC JOURNAL OF AGRICULTURE, Vol. 10, Issue 1, 2012, pp. 01-08, ISSN 1682-8348, SAARC Agricultural Information Centre.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Controlling gummy stem blight of bottle gourd varieties like BARI Lau-2 and BARI Lau-1 may be cultivated to reduce yield loss. Soil amendment with poultry liter or mustard oilcake and application of Bordeaux paste at early stage of crop growth; and foliar application of Indofil M-45 @ 0.20%. at the later stages may be useful to control the disease.

Knowledge Management: Journal