Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Evaluation of Fungicides for the Control of Rice False Smut (ustilaginoidea Virens)

T H Ansari
Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

M T Khatun
Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

M Ahmed
Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

B Nessa
Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

M A I Khan
Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

M A Monsur
Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

S Akhter
Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

M A Ali
Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

M U Salam
Department of Agriculture and Food Western Australia, South Perth, WA6151, Australia

Abstract/ Executive Summary:

Outbreak of false smut, caused by the fungus Ustilaginoidea virens has been recorded in recent years in the popular rice variety ‘BRRI dhan49’ from various parts of Bangladesh. Registered and/or recommended fungicides are not yet available for chemically controlling the disease. Consequently, uses of unregistered fungicides are common by the farmers for the management of the disease. The present study was, therefore, undertaken to identify effectiveness of any fungicides to control rice false smut disease. Seven synthetic foliar fungicides were evaluated in the naturally induced diseased plots. Each fungicide was applied as spray twice, at panicle initiation and at early flowering stage. Compared to the control (no fungicide application), the fungicide ‘Controller 300 EC’ reduced the hill infection by 57%, followed by ‘Green 300 EC’, ‘Cuprofix 30 Disperss’ and Diazole 300 EC, each of those suppressed the hill infection by 50%. While Cuprofix 30 Disperss, compared to the control, resulted in the lowest number of infected panicle per hill, it was statistically similar to rest of the fungicides except for Confidence 10 SL. Fungicides and control did not have any significant variation on the number of infected florets per panicle. With respect to per unit (hill infection × number of infected panicle per hill) disease suppression Controller 300 EC was the best. However, none of the fungicides reached the level of the disease suppression, the essential criterion for registration and/or recommendation of a fungicide under Bangladesh conditions. It is concluded that more multi-location and multi-season experiments will be required to reach a decisive conclusion on foliar chemical options for controlling rice false smut disease under Bangladesh conditions.

Keywords: Florets, Panicles, Disease suppression

Location: Regional station, Bangladesh Rice Research Institute (BRRI) Rajshahi, Bangladesh

Start Date: 00-07-2011

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Fungicide

Objectives:

To identify the Fungicides for the Control of Rice False Smut (Ustilaginoidea virens)

Methodology:

The field experiment was carried out during Transplanted Aman season of 2011 in the experimental farm of the regional station, Rajshahi, of the Bangladesh Rice Research Institute (BRRI). The farm is a High Gangetic River Flood Plain located at 24°30’ N latitude and 38°20’ E longitude. The soil is calcareous alkaline type and pH ranged from 7.0-8.2. The weather is hot and humid during Aman season. The high yielding popular T. Aman rice variety BRRI dhan49 was used as test material. Seven fungicides namely Green 30 EC, Confidence 10 SL, Karisma 28 SC, Cuprofix 30 Disperss, Nativo 75 WG, Dizole 300 EC and Controller 300 EC were evaluated against the RFSm disease. Thirty-one-day-old seedlings of BRRI dhan49 were transplanted in a 20 × 20 cm spacing on July 25, 2011. The size of individual plots was 3 × 3 m. Crop husbandries such as irrigation, fertilizers, weeding were done following standard recommended rice production practices (BRRI 2011). Treatment included the seven fungicides and one control (no fungicide application). They were set in a randomized complete block design and replicated three times. Each chemical was sprayed twice, one at panicle initiation stage and the other at early flowering stage. In the experiment field, the disease infection occurred naturally. Data were recorded on percentage of hill infection, number of total tillers per hill, number of healthy and infected panicles per hill, number of infected florets per panicle, number of filled and unfilled grains per panicle and thousand-grain weight (TGW). The average values of three replications were then subjected to analysis of variance. The DMRT was performed for the mean comparison when treatment differences were found significant. The data were analysed using CROPSTAT software.

Source of Information: Bangladesh Rice J. 20 (2) : 61-66, 2016

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In conclusion, the fungicide Controller 300 EC reduced the hill, panicle and rice floret infection more compared to other tested fungicides. Cuprofix 30 Disperss was effective next to the Controller 300 EC. However, none of the fungicides was found effective for the complete control of false smut disease in rice. This findings echo the results from a recently conducted field survey (Sarker et al., 2016). Previous reports (Chen et al., 1994; Paramjit et al., 2006), the results and above discussion indicate that mixture of propiconazole with copper fungicides might be more effective in controlling the false smut disease in rice. Further investigation in this regard is suggested.

Knowledge Management: Journal