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Genomics and Applied Biology 2015, Vol. 6, No. 3, 1-14
http://gab.biopublisher.ca
5
metribuzin recorded the lower weed dry matter in
potato.
Jaiswal (1994) noticed that, weed control efficiency of
different herbicide treatments ranged from 40 to 91
per cent and highest WCE (91%) was recorded in
pre-emergence application metribuzin in potato.
Chirita (1995) reported that 87% weed control and
14% yield increase with metribuzin + dimethanamide
compared to weedy check, whereas Guttieri and
Eberlein (1997) reported that yield increased with
application of rimsulfuron + metribuzin (sencor) in
potato.
Gill
et al
. (2000) observed that pre-emergence
application of metribuzin 0.7 kg ha
-1
recorded higher
rhizome yield in turmeric. Vasuki (2005) reported that
metribuzin at 1.0 kg ha
-1
as pre emergence herbicide
had lower weed density and higher weed control
efficiency in sugarcane. Channappagoudar
et al
. (2007)
reported that the tuber yield of potato was on par with
pre emergence application of metribuzin 0.75 kg ha
-1
and weed free check. Mishra and Singh (2009) revealed
that pre - emergence application of metribuzin 0.5 kg ha
-1
+ one hand weeding at 30 DAS significantly reduced the
population of all the weed species resulted in increased
seed yield of soybean. Combined application of PE
metribuzin at 1.5 kg ha
-1
supplemented with post
emergence application of 2, 4 D Na salt at 1.0 kg ha
-1
was good for controlling all weeds in sugarcane
(El-Shafai
et al
.
,
2010). Studies by Tuti and Das
(2011) revealed that application of metribuzin at 0.5
kg ha
-1
effectively controlled weeds including
Cyperus
rotundus
(L.) and increased weed control efficiency
resulting in reduction of N, P and K uptake by weeds
which in turn increased seed yield of soybean.
Pendimethalin
Shekhawat and Maliwal (199l) reported that
pendimethalin @ 0.75 kg ha
-1
as pre-emergence
application resulted in greater reduction in dry
weight of weeds and increase in tuber yield than
fluchloralin (0.5 to 1.0 kg ha
-1
) in potato.
Avilkumar and Reddy (2000) found that application of
pendimethalin at 1.0 kg ha
-1
resulted in significantly
lower weed dry matter (127.8 g/m²) as compared to
atrazine at 1.0 kg ha
-1
, fluchloralin @ 1.0 kg ha
-1
and
glyphosate at 0.5 kg ha
-1
and rhizome yield and
equivalent yield was significantly higher over
unweeded control in maize + turmeric intercropping
system. Ramachandra Prasad (2000) reported that
pendimethalin and oxyfluorfen were most effective in
lowering dry weight of grassy weeds as compared to
alachlor and metalachlor in onion. Ajai
et al
. (2002)
reported that pendimethalin 1.0 kg ha
-1
+ hand
weeding (HW) at 80 DAP and oxyflurofen 0.4 kg ha
-1
+ HW at 80 DAP recorded 45 and 39 per cent more
fresh rhizome yield, respectively than weedy plots in
turmeric.
Yadav and Yadav (2003) reported that application of
pendimethalin @ 1.0 kg ha
-1
resulted in lower weed
density (5 m
-
²) and weed dry weight (19 g m
-
²) with
higher weed control efficiency (96.9%) and higher
bulb yield (11 t ha
-1
) in garlic. Babu (2008) reported
that pre-emergence application of pendimethalin at 1.5
kg ha
-1
recorded higher rhizome yield next to weed
free in turmeric.
In onion, pendimethalin at 1.0 kg ha
-1
+ hand weeding and
oxyfluorfen at 0.24 kg ha
-1
recorded higher weed control
efficiency of 80.6 and 73.4 per cent respectively (Patel
et al
.
,
2011). Accoding to Channappagoudar
et al
. (2013),
pre-emergence application of pendimethalin 1.0 kg ha
-1
recorded the lowest weed dry matter followed by
pendimethalin 1.5 kg ha
-1
, while oxyfluorfen 0.30 kg
ha
-1
was least effective in turmeric.
Atrazine
Singh and Mahey (1991) studied the effect of
different weed control treatments in turmeric. They
found that application of atrazine resulted in marked
reduction in dry matter accumulation of weeds after
30 days of sowing followed by metribuzin and straw
mulching, The application of straw mulching
recorded higher yield of fresh rhizomes (65 q ha
-1
).
Atrazine {2-chloro-4-(ethylamino)-6 isopropylamino-1,
3-5-triazine} is a widely used 5-triazine herbicide. It is
used as pre-emergence herbicide in the control of
broadleaf and grass weeds in a variety of commercial
crops as well as roadside and fallow fields (Munier
lamy
et al
.
,
2002).
Singh
et al
. (2003) pointed that
atrazine at 0.50 kg ha
-1
registered 79 per cent weed
