Weed dynamics and production potential of direct-seeded rice cultivars as influenced by weed management

Abstract

The field study was undertaken during rainy season of 2012 and 2013 to evaluate the rice cultivars and weed management effects on weeds growth and yield of direct-seeded rice (DSR) cultivars. The associated weed flora include Echinochloa colona, Echinocloa crus-galli, Cynodon dactylon as grasses; Cyperus rotundus, Cyperus iria as sedges; Caesulia auxillaries and Eclipta alba as broadleaved weeds. Bispyribac-sodium + azimsulfuron (25 + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DAS was found to be most effective in minimizing weed density, biomass and in enhancing the weed control efficiency 40.9% and 38.0% during 2012 and 2013 at 60 DAS, respectively. The maximum rice grain, straw and biological yield was found with application of bispyribac + azimsulfuron (25 g + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DAS and was significantly superior over rest of the treatments during both the years of study.

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Claims 4

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bispyribac-sodium with azimsulfuron minimized weed density and biomass in direct-seeded rice.

Taxon: direct-seeded ricee0
Material: rice cultivarse0
Treatment: Bispyribac-sodium + azimsulfuron (25 + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DASe1
Interactor: weedse0weed
Outcome: weed density, biomasse1
Direction: minimizinge1
Setting: fielde0

Not reportedComparator

Verbatim

e0
“The field study was undertaken during rainy season of 2012 and 2013 to evaluate the rice cultivars and weed management effects on weeds growth and yield of direct-seeded rice (DSR) cultivars”
✓ located verbatim in the source · abstract, characters 0–190 · show in text ↑

e1
“Bispyribac-sodium + azimsulfuron (25 + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DAS was found to be most effective in minimizing weed density, biomass and in enhancing the weed control efficiency 40.9% and 38.0% during 2012 and 2013 at 60 DAS, respectively”
✓ located verbatim in the source · abstract, characters 400–663 · show in text ↑

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bispyribac-sodium with azimsulfuron enhanced weed control efficiency to 40.9% in direct-seeded rice during 2012 at 60 DAS.

Taxon: direct-seeded ricee0
Material: rice cultivarse0
Treatment: Bispyribac-sodium + azimsulfuron (25 + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DASe1
Interactor: weedse0weed
Outcome: weed control efficiencye1
Direction: enhancinge1
Value: 40.9%e1
Qualifier: during 2012e1
Setting: fielde0

Not reportedComparator

Verbatim

e0
“The field study was undertaken during rainy season of 2012 and 2013 to evaluate the rice cultivars and weed management effects on weeds growth and yield of direct-seeded rice (DSR) cultivars”
✓ located verbatim in the source · abstract, characters 0–190 · show in text ↑

e1
“Bispyribac-sodium + azimsulfuron (25 + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DAS was found to be most effective in minimizing weed density, biomass and in enhancing the weed control efficiency 40.9% and 38.0% during 2012 and 2013 at 60 DAS, respectively”
✓ located verbatim in the source · abstract, characters 400–663 · show in text ↑

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bispyribac-sodium with azimsulfuron enhanced weed control efficiency to 38.0% in direct-seeded rice in 2013 at 60 DAS.

Taxon: direct-seeded ricee0
Material: rice cultivarse0
Treatment: Bispyribac-sodium + azimsulfuron (25 + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DASe1
Interactor: weedse0weed
Outcome: weed control efficiencye1
Direction: enhancinge1
Value: 38.0%e1
Qualifier: 2013 at 60 DASe1
Setting: fielde0

Not reportedComparator

Verbatim

e0
“The field study was undertaken during rainy season of 2012 and 2013 to evaluate the rice cultivars and weed management effects on weeds growth and yield of direct-seeded rice (DSR) cultivars”
✓ located verbatim in the source · abstract, characters 0–190 · show in text ↑

e1
“Bispyribac-sodium + azimsulfuron (25 + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DAS was found to be most effective in minimizing weed density, biomass and in enhancing the weed control efficiency 40.9% and 38.0% during 2012 and 2013 at 60 DAS, respectively”
✓ located verbatim in the source · abstract, characters 400–663 · show in text ↑

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Bispyribac-sodium with azimsulfuron gave the maximum grain, straw and biological yield of direct-seeded rice, significantly superior to the other treatments in both years.

Taxon: direct-seeded ricee0
Material: rice cultivarse0
Treatment: bispyribac + azimsulfuron (25 g + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DASe2
Interactor: weedse0weed
Outcome: rice grain, straw and biological yielde2
Direction: maximume2
Qualifier: during both the years of studye2
Comparator: rest of the treatmentse2
Setting: fielde0

Verbatim

e0
“The field study was undertaken during rainy season of 2012 and 2013 to evaluate the rice cultivars and weed management effects on weeds growth and yield of direct-seeded rice (DSR) cultivars”
✓ located verbatim in the source · abstract, characters 0–190 · show in text ↑

e2
“The maximum rice grain, straw and biological yield was found with application of bispyribac + azimsulfuron (25 g + 35 g/ha) + 0.25% NIS as post-emergence at 15–20 DAS and was significantly superior over rest of the treatments during both the years of study”
✓ located verbatim in the source · abstract, characters 665–921 · show in text ↑

bispyribac · yield · Oryza sativa (rice)Positive and negative results

34 papers: 31 positive, 3 negative or no effect

30 papers in the same direction as this paper · 3 reporting no difference from an alternative

no effect
Sequential pendimethalin and bispyribac gave rice grain yield (6.6 t/ha) statistically at par with weed-free treatment.
Energetics, productivity and weed control in different rice (Oryza sativa) establishment methods in North-Western Indo-Gangetic Plains · 2001 · compared with weed-free treatment
No difference from an alternative
no effect
Seed yield under sequential pre-emergence oxadiargyl fb bispyribac at 25 DAS (50.2 q ha-1) was at par with the traditional beushening method.
Effect of weed management practices and seed rates on energy input, output, input output ratio, energy use efficiency and energy productivity on direct seeded rice production system · 2018 · compared with traditional beushening method
No difference from an alternative
no effect
Rice yield under W3 (6.32 t/ha) was similar to the weed free treatment (6.67 t/ha).
Influence of irrigation scheduling and weed management practices on weed density and performance of dry direct seeded rice · 2018 · compared with weed free (W2)
No difference from an alternative

30 papers more in this group

See all 34 papers →

azimsulfuron · yield · Oryza sativa (rice)Positive and negative results

40 papers: 35 positive, 5 negative or no effect

34 papers in the same direction as this paper · 2 in the opposite direction · 3 reporting no difference from an alternative

no effect
Adding metsulfuron to azimsulfuron had no significant effect on rice grain yield.
Evaluation of Azimsulfuron and Metsulfuron-methyl Alone and in Combination for Weed Control in Transplanted Rice · 2008
Opposite direction
no effect
At Taraori, rice yields were similar under pendimethalin or oxadiargyl PRE followed by the stated POST herbicides.
Herbicide options for effective weed management in dry direct- seeded rice under scented rice-wheat rotation of western Indo- · 2016
Opposite direction
no effect
Specified azimsulfuron treatments yielded statistically similarly to pretilachlor in 2006 and 2007.
Evaluation of Azimsulfuron for the Control of Complex Weed Flora in Transplanted Rice · 2008 · compared with pretilachlor
No difference from an alternative

36 papers more in this group

See all 40 papers →

bispyribac-sodium · weed · Oryza sativa (rice)Positive and negative results

153 papers: 149 positive, 4 negative or no effect

148 papers in the same direction as this paper · 1 in the opposite direction · 3 reporting no difference from an alternative

positive
The herbicide sequence lowered weed intensity.
Effect Of Seedbed Preparation Methods And Herbicide Application On Yield And Economics Of Dry Direct-Seeded Rice At Parwanipur, Nepal · 2021
Same directionCites this paper
negative
Bispyribac sodium significantly decreased control efficacy on annual broadleaf weeds.
Control effect of 40% Bispyribac-sodium SC on weeds in direct seeding rice field · 2014
Opposite direction
no effect
Total weed population and dry weight under bispyribac-sodium at 25 g/ha were at par with the higher doses.
Evaluation of bispyribac-sodium in transplanted rice · 2013 · compared with higher doses of bispyribac-sodium at 35 and 50 g/ha
No difference from an alternative

149 papers more in this group

See all 153 papers →

azimsulfuron · weed · Oryza sativa (rice)Results agree

33 papers: 33 positive, 0 negative or no effect

32 papers in the same direction as this paper

positive
Single azimsulfuron POST application reduced total weed biomass by 72% compared with the nontreated control.
Herbicide Options for Weed Control in Dry-Seeded Aromatic Rice in India · 2013 · compared with nontreated control
Same direction
positive
Post-emergence azimsulfuron was the most effective herbicide for controlling weeds compared with early post-emergence bispyribac-sodium and bensulfuron-methyl+pretilachlor.
Crop Establishment and Weed Control Options for Sustaining Dry Direct Seeded Rice Production in Eastern India · 2021 · compared with early post application of bispyribac-sodium and bensulfuron-methyl+pretilachlor
Same direction
positive
A pendimethalin programme followed by post-emergence herbicides gave effective weed control and higher rice yield.
Control of Complex Weed Flora of Dry-seeded Rice (Oryza sativa L.) with Pre- and Post-emergence Herbicides · 2008
Same direction

29 papers more in this group

See all 33 papers →

herbicide · weed · Oryza sativa (rice)Positive and negative results

603 papers: 579 positive, 24 negative or no effect

578 papers in the same direction as this paper · 17 in the opposite direction · 7 reporting no difference from an alternative

negative
Rice flatsedge control by herbicides was lower with residue than without.
Interaction of Rice Residue and PRE Herbicides on Emergence and Biomass of Four Weed Species · 2012 · compared with absence of residue
Opposite direction
no effect
Imazosulfuron applied alone as preemergence did not control grassy weeds, broad leaved weeds or sedges in rice
Effect of tank-mixed herbicides on weeds and transplanted rice (Oryza sativa L.) · 2012
Opposite direction
negative
Oxyfluorfen failed to control other weeds beyond 15 days after sowing.
Stale Seedbed Technique for the Management of Sacciolepis interrupta in Semi-dry Rice · 2000
Opposite direction

599 papers more in this group

See all 603 papers →

herbicide · yield · Oryza sativa (rice)Positive and negative results

802 papers: 725 positive, 77 negative or no effect

724 papers in the same direction as this paper · 57 in the opposite direction · 20 reporting no difference from an alternative

positive
Weed-free treatment had significantly higher grain yield, followed by the herbicide sequence.
Effect Of Seedbed Preparation Methods And Herbicide Application On Yield And Economics Of Dry Direct-Seeded Rice At Parwanipur, Nepal · 2021
Same directionCites this paper
no effect
Weeding every 14 days did not increase rice grain yield.
Weeds in slash‐and‐burn rice fields in northern Laos · 1997
Opposite direction
negative
The non-allelopathic variety showed a grain yield reduction of up to 45-60% even with the low-dose herbicide application.
Effect of allelopathic rice varieties combined with cultural management options on paddy field weeds · 2008
Opposite direction

798 papers more in this group

See all 802 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.

Abstract

Claims 4

The same questions in other papers

bispyribac · yield · Oryza sativa (rice)Positive and negative results

azimsulfuron · yield · Oryza sativa (rice)Positive and negative results

bispyribac-sodium · weed · Oryza sativa (rice)Positive and negative results

azimsulfuron · weed · Oryza sativa (rice)Results agree

herbicide · weed · Oryza sativa (rice)Positive and negative results

herbicide · yield · Oryza sativa (rice)Positive and negative results