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Effect of Planting Time on the Late Blight Disease of Potato in the Resistant Variety/lines (2015 - 2016)

M. S. Hossain
RARS, Burirhat, Rangpur

Abstract/ Executive Summary:

The experiment was conducted during the rabi season of 2015 – 2016 at Regional Agricultural Research Station, Burirhat, Rangpur to observe the effect of planting time on late blight disease and yield. There were three planting times and three varieties in this experiment. The planting time was 15 November, 30 November and 15 December. Out of three test varieties, there were two resistant varieties namely BARI Alu-46 and BARI Alu-53 and a susceptible variety Diamant. The results indicated that late blight severity was increased with the concomitant decrease of yield due to delayed planting. The resistant variety BARI Alu 46 gave the highest yield (59.36 t/ha) with the lowest disease at 30 November planting.

Keywords: Potato, Late blight, Phytophthora infestans, Planting time

Location: The experiment was conducted at Regional Agricultural Research Station, Burirhat, Rangpur

Start Date: 00-00-2015

End Date: 00-00-2016

Program Area: Pest Management

Commodity: Fungal Disease, Potato

Objectives:

To observe the effect of planting time on late blight disease and yield of potato.

Methodology:

The experiment was conducted at RARS, Burirhat, Rangpur during the Rabi season of 2015 - 16. The design of the experiment was split plots with 3 replications. Block to block and plot to plot distance was 1.5 m and 1 m, respectively. Unit plot size was 2m x 1.8m having plant spacing 60 cm x 25 cm. There were 3 planting times and 3 varieties. The planting time was 15 November, 30 November and 15 December. The varieties were BARI Alu-46, BARI Alu-53, Sarpomira and Diamant. Planting time was in the main plots and varieties were in the subplots. Recommended fertilizer doses were applied and other agronomic practices were done properly. Fungicide was not applied in this experiment. Data on disease severity (% leaf area infected) was recorded at 10 days intervals starting from 30 DAP to 90 DAP. Yield i.e. tuber yield (t/ha) was also recorded from the whole plot. Data on different parameters were analyzed following computer package MSTAT-C and means were compared using Duncan’s Multiple Range Test (DMRT).

Source of Information: Annual Research Report 2015-16, Plant Pathology Division, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the above results, it may be concluded that at late planting up to 48.00 t/ha yield of potato yield may be obtained from resistant variety BARI Alu 46 without any fungicide spray.

Knowledge Management: Report/Proceedings