Evaluation of some new herbicides formulations alone and in combination with hand weeding in lowland rice

Abstract

A field investigation was conducted during Samba season of 2017 to evaluate the efficacy of pre and post emergence herbicides in transplanted rice in Cuddalore. The new herbicides evaluated were Pretilachlor 6% + Pyrazosulfuron-ethyl 0.15% GR @ 10 kg ha-1 along with post emergence herbicides Fenoxaprop-p-ethyl 9.3% w/w @ 875 ml ha-1, Bispyribac-sodium 10% SC @ 200 ml ha-1. Results of the study revealed that Pre-emergence herbicide application of Pretilachlor + Pyrazosulfuron-ethyl followed by post emergence herbicide application of Bispyribac-sodium recorded lower weed total population, higher growth parameters, grain yield (5163 kg ha-1) and straw yield (7654 kg ha-1) followed by Pretilachlor + Pyrazosulfuron-ethyl + Fenoxaprop-p-ethyl.

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Claims 4

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The pre-emergence combination followed by bispyribac gave lower total weed population than the fenoxaprop sequence.

Taxon: riceOryza sativat0
Treatment: Pretilachlor + Pyrazosulfuron-ethyl followed by post emergence herbicide application of Bispyribac-sodiume0
Outcome: weed total populatione0
Direction: lowere0
Comparator: Pretilachlor + Pyrazosulfuron-ethyl + Fenoxaprop-p-ethyle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

*Oryza sativa* · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0
“Pre-emergence herbicide application of Pretilachlor + Pyrazosulfuron-ethyl followed by post emergence herbicide application of Bispyribac-sodium recorded lower weed total population, higher growth parameters, grain yield (5163 kg ha-1) and straw yield (7654 kg ha-1) followed by Pretilachlor + Pyrazosulfuron-ethyl + Fenoxaprop-p-ethyl.”
✓ located verbatim in the source · abstract, characters 411–747 · show in text ↑

t0
“in lowland rice”
✓ located verbatim in the source · title, characters 90–105 · show in text ↑

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The bispyribac sequence gave higher growth parameters.

Taxon: riceOryza sativat0
Treatment: Pretilachlor + Pyrazosulfuron-ethyl followed by post emergence herbicide application of Bispyribac-sodiume0
Outcome: growth parameterse0
Direction: highere0
Comparator: Pretilachlor + Pyrazosulfuron-ethyl + Fenoxaprop-p-ethyle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim

e0
“Pre-emergence herbicide application of Pretilachlor + Pyrazosulfuron-ethyl followed by post emergence herbicide application of Bispyribac-sodium recorded lower weed total population, higher growth parameters, grain yield (5163 kg ha-1) and straw yield (7654 kg ha-1) followed by Pretilachlor + Pyrazosulfuron-ethyl + Fenoxaprop-p-ethyl.”
✓ located verbatim in the source · abstract, characters 411–747 · show in text ↑

t0
“in lowland rice”
✓ located verbatim in the source · title, characters 90–105 · show in text ↑

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The bispyribac sequence produced 5163 kg ha-1 grain yield.

Taxon: riceOryza sativat0
Treatment: Pretilachlor + Pyrazosulfuron-ethyl followed by post emergence herbicide application of Bispyribac-sodiume0
Outcome: grain yielde0
Direction: highere0
Value: 5163 kg ha-1e0
Comparator: Pretilachlor + Pyrazosulfuron-ethyl + Fenoxaprop-p-ethyle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim

e0
“Pre-emergence herbicide application of Pretilachlor + Pyrazosulfuron-ethyl followed by post emergence herbicide application of Bispyribac-sodium recorded lower weed total population, higher growth parameters, grain yield (5163 kg ha-1) and straw yield (7654 kg ha-1) followed by Pretilachlor + Pyrazosulfuron-ethyl + Fenoxaprop-p-ethyl.”
✓ located verbatim in the source · abstract, characters 411–747 · show in text ↑

t0
“in lowland rice”
✓ located verbatim in the source · title, characters 90–105 · show in text ↑

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The bispyribac sequence produced 7654 kg ha-1 straw yield.

Taxon: riceOryza sativat0
Treatment: Pretilachlor + Pyrazosulfuron-ethyl followed by post emergence herbicide application of Bispyribac-sodiume0
Outcome: straw yielde0
Direction: highere0
Value: 7654 kg ha-1e0
Comparator: Pretilachlor + Pyrazosulfuron-ethyl + Fenoxaprop-p-ethyle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim

e0
“Pre-emergence herbicide application of Pretilachlor + Pyrazosulfuron-ethyl followed by post emergence herbicide application of Bispyribac-sodium recorded lower weed total population, higher growth parameters, grain yield (5163 kg ha-1) and straw yield (7654 kg ha-1) followed by Pretilachlor + Pyrazosulfuron-ethyl + Fenoxaprop-p-ethyl.”
✓ located verbatim in the source · abstract, characters 411–747 · show in text ↑

t0
“in lowland rice”
✓ located verbatim in the source · title, characters 90–105 · show in text ↑

Pretilachlor · yield · Oryza sativa (rice)Results differ

141 papers: 133 positive, 8 negative or no effect

132 papers in the same direction as this paper · 3 in the opposite direction · 5 reporting no difference from an alternative

positive
T12 produced the highest rice height, tiller number and dry matter at the reported stages, comparable with T10 and T11.
Effect of weed management practices on the growth and yield of kharif transplanted rice (Oryza sativa L.) in Vertisols of Chhattisgarh · 2024 · compared with T10
Same directionCites this paper
negative
Pretilachlor and triclopyr at any dose could not yield at par with riceguard or anilofos plus triclopyr.
Effect of Herbicides on Weeds in Transplanted Rice · 2004 · compared with riceguard and anilofos+triclopyr
Opposite direction
negative
Pretilachlor caused phytotoxicity and reduced rice plant height and seed yield.
Rice Yield Variations as Affected by Direct Seeding and Herbicide Application · 2017
Opposite direction

137 papers more in this group

See all 141 papers →

Pretilachlor · weed · Oryza sativa (rice)Results differ

150 papers: 147 positive, 3 negative or no effect

146 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative

negative
Pretilachlor did not effectively control weeds in dry seeding.
Integrated Management of Weeds in Direct-Seeded Rice in Cambodia · 2020
Opposite direction
negative
Bensulfuron-methyl plus pretilachlor at 60+600 g ha lowered weed number and dry weight at 45 DAT.
Efficacy of herbicides on weed management in wet season transplanted rice · 2015
Opposite direction
no effect
Pretilachlor at 500 g/ha alone gave results comparable to two rounds of hand weeding.
Optimization of Pretilachlor Dose for Weed Management in Transplanted Rice · 2002 · compared with two rounds of hand weeding
No difference from an alternative

146 papers more in this group

See all 150 papers →

bispyribac-sodium · yield · Oryza sativa (rice)Results differ

170 papers: 161 positive, 9 negative or no effect

160 papers in the same direction as this paper · 4 in the opposite direction · 5 reporting no difference from an alternative

no effect
Injury from bispyribac-sodium was transient and caused no rice yield loss.
Environmental conditions affect herbicide selectivity on paddy rice in Southern Brazil · 2022
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
Bispyribac sodium produced rice yield similar to manual weed control.
Effect of different weed control methods to yield of lowland transplanted rice in the Jaunpur district of Uttar Pradesh · 2016 · compared with manual weed control
Opposite direction

166 papers more in this group

See all 170 papers →

Pyrazosulfuron-ethyl · growth · Oryza sativa (rice)Positive and negative results

13 papers: 11 positive, 2 negative or no effect

10 papers in the same direction as this paper · 2 in the opposite direction

negative
Pyrazosulfuron-ethyl reduced rice growth more at 20/ than 30/, particularly roots.
Factors and Recovery of Herbicide Phytotoxicity on Direct - seeded Rice - I. Variation Factors of Phytotoxicity · 1996 · compared with high temperature(30/)
Opposite direction
negative
Under nitrogen, pyrazosulfuron treatments inhibited shoot and root growth more than bensulfuron treatments.
Factors and Recovery of Herbicide Phytotoxicity on Direct-seeded Rice 3. Phytotoxicity of Herbicide by Three Elements of Fertilizer · 1998 · compared with bensulfuron methyl
Opposite direction
positive
Pyrazosulfuron-ethyl application increased rice seedling biomass.
Efficacy of Pyrazosulfuron-ethyl Against Weeds in Rice Nursery Under Mid Hill Conditions of Himachal Pradesh · 2005
Same direction

9 papers more in this group

See all 13 papers →

Pretilachlor · growth · Oryza sativa (rice)Positive and negative results

22 papers: 20 positive, 2 negative or no effect

19 papers in the same direction as this paper · 2 in the opposite direction

negative
Pretilachlor reduced rice leaf elongation at concentrations as low as 300 μg −1.
Effect of CGA 123407 as a safener for pretilachlor in rice (Oryza sativa L.). Recordings of elongation rates of single rice leaves · 1985
Opposite direction
negative
Pretilachlor + fenclorim significantly reduced plant height as a seed treatment.
Herbicide seed treatment for weed control in wet‐seeded rice · 1992
Opposite direction
positive
Pretilachlor at 450 reduced root fresh weight inhibition by 2.6%.
Chemical control of weedy rice in precise hill‐direct‐seeded rice in South China · 2013
Same direction

18 papers more in this group

See all 22 papers →

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

31 papers: 24 positive, 7 negative or no effect

23 papers in the same direction as this paper · 7 in the opposite direction

negative
Bispyribac-sodium reduced rice shoot biomass by 9 to 17% in aerobic soil.
Growth Response of Direct-Seeded Rice to Oxadiazon and Bispyribac-Sodium in Aerobic and Saturated Soils · 2011
Opposite direction
no effect
V-10029 did not affect Cocodrie shoot or root weight or shoot-root ratio.
Shoot and Root Growth of Rice (Oryza sativa) in Response to V-10029¹ · 2002
Opposite direction
negative
At one week, bispyribac-sodium reduced Bengal root growth more than penoxsulam at 30 g/ha under one-day flood timing.
Influence of Flood Interval and Cultivar on Rice Tolerance to Penoxsulam · 2008 · compared with penoxsulam at 30 g/ha
Opposite direction

27 papers more in this group

See all 31 papers →

Pyrazosulfuron-ethyl · weed · Oryza sativa (rice)Positive and negative results

66 papers: 65 positive, 1 negative or no effect

64 papers in the same direction as this paper · 1 in the opposite direction

62 papers more in this group

See all 66 papers →

Pyrazosulfuron-ethyl · yield · Oryza sativa (rice)Positive and negative results

77 papers: 73 positive, 4 negative or no effect

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

negative
Resistant Monochoria vaginalis that escaped pyrazosulfuron-ethyl plus molinate reduced rice yield by 70% compared with hand weeding in direct-seeded rice.
Sulfonylurea herbicide‐resistant Monochoria vaginalis in Korean rice culture · 2003 · compared with hand weeding
Opposite direction
negative
Pyrazosulfuron-ethyl at 8 DAT had the lowest grain yield, 3.66 t./ha.
Effectiveness of Different Weedicides on Weed Biomass, Nutrient Uptake and Yield of Rice · 2013
Opposite direction
negative
Pyrazosulfuron ethyl yielded 3.55 t haG 1 and performed worst, similarly to the weedy plot.
Post-Emergence Herbicides Selection for Rotational Use in Puddle Transplanted Rice to Avoid Herbicide Resistance in Weeds · 2023 · compared with weedy plot
Opposite direction

73 papers more in this group

See all 77 papers →

8 of 12 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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

Pretilachlor · yield · Oryza sativa (rice)Results differ

Pretilachlor · weed · Oryza sativa (rice)Results differ

bispyribac-sodium · yield · Oryza sativa (rice)Results differ

Pyrazosulfuron-ethyl · growth · Oryza sativa (rice)Positive and negative results

Pretilachlor · growth · Oryza sativa (rice)Positive and negative results

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

Pyrazosulfuron-ethyl · weed · Oryza sativa (rice)Positive and negative results

Pyrazosulfuron-ethyl · yield · Oryza sativa (rice)Positive and negative results