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Effect of Pre and Post Emergence Herbicides on Weed Control in Maize (Zea mays L.)

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Title Effect of Pre and Post Emergence Herbicides on Weed Control in Maize (Zea mays L.)
 
Creator Ishrat D. Haji
 
Contributor C.S. Hunshal
 
Subject Agronomy
 
Description A field experiment was conducted to study the effect of pre and post
emergence herbicides on weed control in maize (Zea mays L.) in clay loam soils on
farmer?s field in Hale Torgal village of Ramdurg taluk, Belgaum district during 2010-
2011 under rainfed conditions. The experiment was laid out in randomized block
design with three replications and ten treatments. Treatment combinations consisted
of pre emergence application of atrazine 50 WP (1.25 kg ha-1) followed by (fb) post
emergence application of atrazine 50 WP (1.50 or 1.75 kg ha-1), directed spray of
paraquat 24 SL (1.0 or 1.5 kg ha-1), glyphosate 41SL (2.5 or 3.0 kg ha-1) and 2,4-D 80
WP (2.0 or 3.0 kg ha-1) along with standard check (Atrazine 50 WP 1.25 kg ha-1 + 2
intercultivation (at 30 and 45 DAS) + 1 hand weeding (between 30 and 45 DAS) and
weedy check.
Weedy check recorded the highest dry weight of the weeds whereas lowest
was recorded in Atrazine 50 WP (1.25 kg ha-1) fb glyphosate 41SL (2.5 kg ha-1). Total
number of weeds, weed control index followed the same trend. The higher maize
yield was obtained with atrazine 50 WP 1.25 kg ha-1 fb glyphosate 41SL 2.5 kg ha-1
(5305 kg ha-1) whereas weedy check recorded significantly lower maize yield (2342
kg ha-1). The economics of weed management practices indicated that application of
atrazine 50 WP (1.25 kg ha-1) fb glyphosate 41SL (3.0 kg ha-1) resulted in higher net
returns (Rs 60702 ha-1) and B: C (3.76) compared to rest of the treatments.
 
Date 2016-11-11T18:01:26Z
2016-11-11T18:01:26Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/85205
 
Format application/pdf
 
Publisher UAS, Dharwad