Author(s):
Jay Kumar Yadav, HK Singh, SK Singh, Sandeep Kumar and Divya Singh
Abstract:
Downy mildew caused by
Peronospora brassicae (Pers. ex Fr.) Fr. is one of the most common and destructive disease of Indian mustard [
Brassica juncea (L.) Czern & Coss.] The experiments were conducted under field condition to develop effective management strategies for this disease through evaluation of date of sowing. Therefore, series of experiments were conducted during 2015-2016 at Genetics and Plant Breeding Farm, N. D. University of Agriculture and Technology, Kumarganj, Ayodhya (U.P.) to find out the appropriate sowing time to minimize the Downey
mildew
disease severity and maximum yield. The sowing dates w
as01 October (D1), 10 October (D2), 20 October (D3), 30 October (D4), 10 November (D5), 20 November (D6), 30 November (D7) and 10 December (D8), 2015 after 10 days intervals.
Over all on the basis of pooled data of different time intervals the maximum incidence (20.92%) was also recorded in the plots sown on 10
th November, 2015. In contrastingly, it was minimum (0.73) in plots sown on 1
st October, 2015
and highest AUDPC
was
recorded
in 10
th November, 2015 sown crops and minimum is recorded as a
1
st October, 2015 (15)
. On the basis of experimentation it was concluded that early sown crops (I
st Fortnight of October) escaped the disease as compared to its delayed sowings (2
nd Fortnight of October, 1
st and 2
nd Fortnight of November). Management of the Downey
mildew disease
through manipulation of date of sowing is a cheapest and best method of disease control .
Jay Kumar Yadav, HK Singh, SK Singh, Sandeep Kumar and Divya Singh. Effect of sowing dates on development of downey mildew disease in Indian mustard (Brassica junceaL.). J Pharmacogn Phytochem 2019;8(1):516-518.