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Study on the Spray Schedule of Rovral 50 Wp for the Management of Alternaria Blight of Cabbage Seed Crop

Md. Sakhawat Hossain
CSO
ORC, BARI,Gazipur

R. Momotaz
SO
Plant Pathology Division, BARI,Gazipur

Abstract/ Executive Summary:

Maximum disease reduction was recorded when spray was started at the day of head incision followed by one week after head incision but. Seed yield/ plant and that of per hectare were the highest when spraying started at 1 week after head incision and just after disease onset. Yield contributing characters were also the highest when spraying started at 1 week after head incision and in plot start spraying just after disease onset.

Keywords: Spray Schedule, Rovral 50 WP, Alternaria Blight , Cabbage

Location: Plant Pathology Division, BARI,Gazipur

Start Date: 10-11-2006

End Date:

Program Area: Pest Management

Commodity: Diseases

Objectives:

To find out the appropriate time of spraying Rovral 50 WP for the management of the disease.

Methodology:

Thirty days old seedlings were transplanted on November 10, 2006 in 2 m x 1 m unit plot laid out in RCB design with three replications. Ten seedlings were planted in each plot in two rows at 50 cm x 40 cm spacing. Cabbage head were incised on January 15, 2006 and first visible disease symptom appeared on January 21, 2007. There was six commencing dates of spraying viz. one week before head incision, at the day of head incision, one week after head incision, two weeks after, just after disease onset and control (no fungicide). Data on percent pod infection, percent disease index (PDI) of pod spot, number of pod per plant, pod length, number of seed per pod, weight of 1000 seed, and seed yield per plant were recorded. Seed yield per hectare was computed on the basis of per plot yield.

Source of Information: Annual report 2006-07, Plant Pathology Division, BARI,Gazipur

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Date of commencing of spray had significant effect on disease severity and maximum disease reduction was recorded when spray was started at the day of head incision followed by one week after head incision but the effect of these two commencing dates had statistically similar. Seed yield/ plant and that of per hectare were the highest when spraying started at 1 week after head incision and just after disease onset followed by at the day of head incision. Yield contributing characters were also the highest when spraying started at 1 week after head incision and in plot start spraying just after disease onset.

Knowledge Management: Report/Proceedings