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Effect of Planting Time and Spray Schedule on Development of Stemphylium Blight of Lentil

M.B. ANWAR
Pulses research Centre, BARI, Ishurdi, Pabna

Abstract/ Executive Summary:

The experiment was conducted at Regional Agricultural Research Station, Jessore during Rabi 2015-16. The experiment was laid out in a Split plot design with four main plots and four subplots in each main plot. Four planting time were applied as main plot treatment such as MP1=25th October, MP2=5th November, MP3=15th November and MP4=25th November, 2015. On the other hand, four spray schedule were placed as subplot treatment in each main plot, as SP1=40 DAS, SP2=50 DAS, SP3=60 DAS and SP4=70 DAS. Among the treatments MP2, where planting date was 05 November 2015, and SP3, where the spray schedule started at 60DAS showed better performance for reducing (2.00) Stemphylium blight disease severity and increasing yield (1485 kg/ha).

Keywords: Stemphylium blight, Lentil, Planting time

Location: This experiment was conducted at Regional Agricultural Research Station, Jessore

Start Date: 00-00-2015

End Date: 00-00-2016

Program Area: Pest Management

Commodity: Fungal Disease, Lentil

Objectives:

This experiment was conducted to study on the interaction effect of planting time and spray schedule on development of Stemphylium blight of lentil in field.

Methodology:

This experiment was conducted at Regional Agricultural Research Station, Jessore during rabi 2015- 16. The experiment was laid out in a Split plot design with four main plots and four subplots in each main plot. Unit plot size was 6.5m x 4.5m and 3m x 2m for main and sub plot, respectively. The plot to plot and block to block distance was 1m and 1.5m, respectively. Four planting time were applied as main plot treatment such as MP1=25th October, MP2=5th November, MP3=15th November and MP4=25th November, 2015. On the other hand, four spray schedule were placed as subplot treatment in each main plot, as SP1=40 DAS, SP2=50 DAS, SP3=60 DAS and SP4=70 DAS. BARI masur-1 used as experimental material. Fertilizer and other intercultural operations were applied as per recommendation by PRC, BARI. Stemphylium blight was rated on a 0-5 scoring scale (Bakr and Ahmed, 1992, Bakr et al., 2000) where, 0= no infection (HR), 1= few scattered leaf infection but no twig blighted (MR), 2= 5-10% leaf infected and or few scattered twig blighted (MR),3=11-20% leaflet infected and /or 1-5% twigs blighted (MS), 4=21-50% leaflet infected and /or 6-10% twigs blighted (S) and 5=above 51% leaflet infected and /or more than 10% twigs blighted (HS). Data on yield contributing characters such as plant height, number of branches per plant, number of pods per plant and finally yield were taken.

Source of Information: Annual Research Report - 2015 - 2016, Pulses research Centre, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The lowest Stemphylium score (2.00) was found from MP2 x SP3 (sowing date at 5th November 2015) which was statistically similar with those of MP2 x SP2 and Mp3 x SP2 and the highest score (4.33) was recorded from MP4 x SP3 and MP4 x SP4 plots where planting date was 25th November, 2015. The maximum plant height (40.00 cm) was found in MP1 x SP2 followed by MP1 x SP3 and MP2 x SP3 and the minimum (29.60 cm) in MP4 x SP4. The height plant/m² (234) was found in MP2 x SP3 and the lowest (167) in MP4 x SP4 treated plot followed by MP4 x SP3. The height pod/plant (94.00) was obtained in MP2 xSP3 followed by MP2 x SP2 and MP3 xSP2 on the other hand the lowest pod/plant 180 (51.67) was obtained in MP4 x SP3 treated plot followed by MP4 x SP4.The highest 1000 seed weight was performed by MP2 x SP3 plot (16.13g) which was statistically similar with MP2 X SP2, MP2 x SP4, MP1 x SP4 and MP3 x SP2 treated plot. On the other hand, the lowest (12.67g) in MP4 X SP4 treated plot. In case of yield, the highest yield (1485 kg/ha) was found in MP2 x SP3 which was statistically similar to MP2 x SP2 and the lowest (922 kg/ha) in MP4 x SP4 followed by MP4 x SP3 treated plot. The study revealed that MP2 X SP3 (sowing date 5th November, 2015 X spray at 60 DAS) has significant effect for controlling Stemphylium blight disease with increasing yield of lentil in field condition.

Knowledge Management: Report/Proceedings