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Efficacy of Some Organic Amendments for the Control of Ufra Disease of Rice

M Abdul Latif
Plant Pathology Division, Bangladesh Rice Research Institute (BRRI), Joydebpur, Gazipur 1701, Bangladesh.

Sharmina Akter
Plant Pathology Division, Bangladesh Rice Research Institute (BRRI), Joydebpur, Gazipur 1701, Bangladesh.

M Shahjahan Kabir
Plant Pathology Division, Bangladesh Rice Research Institute (BRRI), Joydebpur, Gazipur 1701, Bangladesh.

M AbdM Ansar Ali
Regional Station, Bangladesh Rice Research Institute (BRRI), Rajshahi, Bangaladesh.

M Anwar Hossain
Plant Pathology Division, Bangladesh Rice Research Institute (BRRI), Joydebpur, Gazipur 1701, Bangladesh.

M Loothfor Rahman
Plant Pathology Division, Bangladesh Rice Research Institute (BRRI), Joydebpur, Gazipur 1701, Bangladesh.

Abstract/ Executive Summary:

Nine organic amendments, namely, Bishkatali leaf dust, mustard cake, sesame cake, jute seed dust, Neem leaf dust, Neem cake, Neem seed dust, Bankalmi leaf dust and rice husk were used in controlling rice ufra disease in three Boro seasons during 1994-1996. The amendments were applied at the rate of 200 kg/ha except for rice husk (500 kg/ha). All the amendments reduced the damaged tiller, ufra 3 and total ufra significantly and gave higher percentage of healthy panicles and increased yield over control (diseased). In all seasons, due to application of Bishkatali leaf dust, mustard cake, sesame cake, jute seed dust, Neem leaf dust, Neem seed dust, Bankalmi leaf dust and rice husk the yield was increased that ranged from 61.60-67.17, 56.07-71.43, 67.98-75.98, 65.78-78.51, 62.25-76.10, 61.79-79.06 and 62.53-80.16, 61.01-71.43% respectively over the control (diseased). The organic amendments could be used as the alternatives of nematicides for the control of ufra disease.

Keywords: Organic amendments, Ufra disease, Rice

Location: BRRI

Start Date: 00-00-1984

End Date: 00-00-1986

Program Area: Pest Management

Commodity: Rice

Objectives:

To study the effects of organic amendments in controlling ufra disease of rice

Methodology:

The layout of the experiment was done in T-Aman season. Each plot was surrounded by 20-25 cm high mud plastered levee. The seedlings were infected with 100 nematode/seedling in seed bed12. Thirty 5-day-old seedlings with visible chlorotic ufra symptom on the leaf sheath were transplanted in the plot. At maturity, the rice was harvested, leaving 3-4 inches nematode infested straw in the field. Two control treatments (healthy and diseased) were also included in the experiments. The straw was incorporated into the soil in the following Boro season. Three experiments were conducted at Bangladesh Rice Research Institute (BRRI) Farm, Gazipur during Boro season of 1994, 1995 and 1996 to evaluate nine different organic amendments, namely, Bishkatali (Polygonum hydropiper) leaf dust, mustard (Brassica nigra) cake, sesame (Sesamum indicum) cake, jute (Corchorus olitorius) seed dust, Neem (Azadiraxhta indica) leaf dust, Neem cake, Neem seed dust, Bankalmi (Ipomoea sepiaria) leaf dust and rice (Oryza sativa) husk. Rice variety BR3 was used for this experiment. The amendments were applied at the rate of 200 kg/ha, except for rice husk (500 kg/ha), at 7 days before transplanting of seedling in a 2 m x 2 m plot at 25 cm x 15 cm spacing. The experiment was conducted in randomized complete block design (RCBD) with four replications. Thirty 5-day-old healthy seedlings were transplanted in organic amended plot. Two controls were used for this experiment, one was healthy and other was diseased. At harvest, crop from the whole plot was cut and diseased panicles were categorized into damaged tiller (no panicle initiation), ufra 1 (panicle completely enclosed in leaf sheath), ufra 2 (partially emerged panicle but unfilled grain) and ufra 3 (completely emergedpanicle with unfilled grain)13. Data on percent damaged tiller, ufra 3, total ufra (damaged tiller + ufra 1 + ufra 2 + ufra 3), healthy panicles and yield (t/ha) were taken for statistical analysis. Yield was adjusted at 14% moisture level after harvest. Yield increased over the control was also determined for each season.

Source of Information: Bangladesh J Microbiol, Volume 23, Number 2, December 2006, pp 118-120

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

All the amendments reduced the damaged tiller, ufra 3 and total ufra significantly and gave higher percentage of healthy panicles and increased yield over control (diseased). In all seasons, due to application of Bishkatali leaf dust, mustard cake, sesame cake, jute seed dust, Neem leaf dust, Neem seed dust, Bankalmi leaf dust and rice husk the yield was increased that ranged from 61.60-67.17, 56.07-71.43, 67.98-75.98, 65.78-78.51, 62.25-76.10, 61.79-79.06 and 62.53-80.16, 61.01-71.43% respectively over the control (diseased). The organic amendments could be used as the alternatives of nematicides for the control of ufra disease.

Knowledge Management: Journal