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Performance of Seed Potato Produced from Sprout Cutting, Stem Cutting and Conventional Tuber Against Pvy and Plrv

M. S. RAHMAN
Ph.D Student of BSMRAU
Upazilla Agriculture Officer, Department of Agricultural Extension, Gazipur Sadar, Gazipur 1701

A. M. AKANDA
Professor
Department of Plant Pathology, BSMRAU, Joydebpur, Gazipur 1706, Bangladesh.

Abstract/ Executive Summary:

The performance of seed tubers harvested from potato plants grown from sprout cutting, stem cutting and conventional seed tubers against PVY and PLRV were investigated. Sprout cutting, stem cutting and conventional seed tubers of variety Diamant were planted and second and third generation seed tubers were harvested. The least incidence of PVY and PLRV was recorded when seed tubers from sprout cutting were used. Whereas, the highest incidence of the viruses was observed where conventional seed tubers wete planted. Incidence of PVY, PLRV and their mixed infection was lower in earlier generations as compared to later generations. Performance of seed tubers produced from sprout cutting was better in respect of plant growth, tuber number and tuber yield per hill as compared to seed tubers obtained from stem cutting or conventional method.

Keywords: Performance, Seed potato,Sprout cutting, Stem cutting, PVY, PLRV, Yield

Location: Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur

Start Date: 00-00-2004

End Date: 00-00-2006

Program Area: Crop-Soil-Water Management

Commodity: Potato

Objectives:

To evaluate the performance of seed potato produced from sprout cutting, stem cutting and conventional tubers against PVY and PLRV infection.

Methodology:

Second and third generation seed potato tubers produced from sprout cutting, stem cutting and conventional tubers of E-class seed were obtained from Foundation Seed Potato Production Farm, BADC, Domar. The variety was Diamant. The experiment was conducted at the experimental field of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur, during 2004-05 using 2 and 3 generation seed tubers. It was repeated during 2005-06 using 3rd and 4th generation seed tubers produced and preserved in the previous year. Fertilizers were applied at 350-250-270-120-120-106 kg/ha of urea, TSP, MP, gypsum, magnesium sulphate, zinc sulphate and borax, respectively, as recommended for Bangladesh (Anon., 2004). One half of urea and full dose of all other fertilizers were applied at the time of planting. Other half of urea was applied as side dressing after 35 days of planting when first earthing up was done. During land preparation, cowdung was applied at 10 t/ha. In both the years, seed tubers were planted on 23 November. During both the crop seasons of 2004- 05 and 2005-06, seed tubers were preserved in the cold storage. Whole tubers were planted maintaining 60 cm row to row and 25 cm seed to seed distances. The experiment was laid out following randomized complete block design (RCBD) with four replications. The unit plot size was 3m × 3m. Intercultural operations, such as irrigation, weeding, mulching, and earthing up were done as and when necessary. Fungicide, Dithane M-45 was applied at 0.25% to protect the crop from fungal diseases. No insecticide was used in the field. Before haulm pulling, virus infected plants were identified studying symptoms of the diseases and confined using indicator plants (Hill, 1984) and DAS-ELISA following the fundamental protocol outlined by Clark and Adams (1977) and modified by Akanda et al. (1991). Symptoms appeared on infected plants were compared with standard symptoms of PVY and PLRV (Hooker, 1981). Ninety days after planting, the crop was harvested. Data on the incidence of PVY and PLRV, plant height, stem number, tuber number and tuber yield per plant were recorded. Subsequently, the tuber obtained from sprout cutting were designated as sprout cutting tuber, the tuber obtained from stem cutting as stem cutting tuber and those obtained from traditionally cultivated crop from seed were designated as conventional tuber. Disease incidence and yield loss was calculated using the following formula: Disease incidence (%) = (Number of infected plants /Total plants) × 100 Yield reduction (%) = (A-B) /An × 100, where A = Yield of healthy plant, B = Yield of diseased plant. Data were analyzed using Duncan Multiple Range Test.

Source of Information: Bangladesh J. Agril. Res. 34(4) : 609-622, December 2009, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Performance of seed tubers obtained from sprout cutting was better in respect of growth parameters, yield and yield contributing characters as compared to stem cutting and conventional tubers.

Knowledge Management: Journal