Paper · 2006 · Indian Journal of Weed Science

Efficacy of Herbicides in Wet Direct-sown Summer Rice

Sanjoy Saha

8
claims
14
verbatim quotes
5
citations
2
research areas
—
Not open access

Abstract

Major weed nora associatcd with wet direct-sown summer rice during the dry season comprised mainly Echinochloa colona (9.5%,), Cyperus defformis (30.2%), Fimbistrylis miliacea (27.0%,), Sphenochlea zeylanica (15.8%) and Ludwigia parviflora (17.5%.). Pyrazosulfuron-ethyl (25 g ha−1) applied at 10 days after sowing was most effective in controlling the weeds (95.6%) and maximizing rice grain yield (5.72 t ha−1). This was at par with hand wceding twice at 20 and 40 DAS in terms of weed control efficiency and grain yield. Pyrazosulfuron ethyl (20 g ha−1) applied at 10 DAS, pretilachlor + safener (750 g ha−1) applied at 7 DAS and fentra/amide (120 g ha−1) applied at 7 DAS also showed good suppression of weeds with weed control etliciency of 93.7, 91.4 and 90.5%, respectively. There was more than 45%, reduction in the grain yield of rice due to competition with weeds in weedy plots.

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Claims 8

Observationobservedoriginal resultmeasured

Claim · model-written summary

Five weed species comprised the major weed flora in wet direct-sown summer rice.

Outcome
weed norae0
Setting
dry seasone0

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

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

Verbatim

e0

“Major weed nora associatcd with wet direct-sown summer rice during the dry season comprised mainly Echinochloa colona (9.5%,), Cyperus defformis (30.2%), Fimbistrylis miliacea (27.0%,), Sphenochlea zeylanica (15.8%) and Ludwigia parviflora (17.5%.).”

✓ located verbatim in the source · abstract, characters 0–249 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pyrazosulfuron-ethyl at 25 g ha−1 controlled 95.6% of weeds.

Treatment
Pyrazosulfuron-ethyl (25 g ha−1)e0
Outcome
controlling the weedse0
Direction
most effectivee0
Value
95.6%e0

Not reportedComparator

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

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

Verbatim

e0

“Pyrazosulfuron-ethyl (25 g ha−1) applied at 10 days after sowing was most effective in controlling the weeds (95.6%)”

✓ located verbatim in the source · abstract, characters 250–366 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 49–53 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pyrazosulfuron-ethyl at 25 g ha−1 maximized rice grain yield at 5.72 t ha−1.

Treatment
Pyrazosulfuron-ethyl (25 g ha−1)e0
Outcome
rice grain yielde0
Direction
maximizinge0
Value
5.72 t ha−1e0

Not reportedComparator

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

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

Verbatim

e0

“Pyrazosulfuron-ethyl (25 g ha−1) applied at 10 days after sowing was most effective in controlling the weeds (95.6%) and maximizing rice grain yield (5.72 t ha−1)”

✓ located verbatim in the source · abstract, characters 250–412 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Pyrazosulfuron-ethyl at 25 g ha−1 was at par with hand weeding twice for weed control and grain yield.

Treatment
Pyrazosulfuron-ethyl (25 g ha−1)e1
Outcome
weed control efficiency and grain yielde0
Direction
at pare0
Comparator
hand wceding twice at 20 and 40 DASe0

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

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

Verbatim

e0

“This was at par with hand wceding twice at 20 and 40 DAS in terms of weed control efficiency and grain yield.”

✓ located verbatim in the source · abstract, characters 414–523 · show in text ↑
e1

“Pyrazosulfuron-ethyl (25 g ha−1) applied at 10 days after sowing”

✓ located verbatim in the source · abstract, characters 250–314 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 49–53 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pyrazosulfuron ethyl at 20 g ha−1 suppressed weeds with 93.7% control efficiency.

Treatment
Pyrazosulfuron ethyl (20 g ha−1)e0
Outcome
weed control etliciencye0
Direction
suppressione0
Value
93.7e0

Not reportedComparator

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

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

Verbatim

e0

“Pyrazosulfuron ethyl (20 g ha−1) applied at 10 DAS, pretilachlor + safener (750 g ha−1) applied at 7 DAS and fentra/amide (120 g ha−1) applied at 7 DAS also showed good suppression of weeds with weed control etliciency of 93.7, 91.4 and 90.5%, respectively.”

✓ located verbatim in the source · abstract, characters 524–781 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 49–53 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pretilachlor plus safener at 750 g ha−1 suppressed weeds with 91.4% control efficiency.

Treatment
pretilachlor + safener (750 g ha−1)e0
Outcome
weed control etliciencye0
Direction
suppressione0
Value
91.4e0

Not reportedComparator

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

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

Verbatim

e0

“Pyrazosulfuron ethyl (20 g ha−1) applied at 10 DAS, pretilachlor + safener (750 g ha−1) applied at 7 DAS and fentra/amide (120 g ha−1) applied at 7 DAS also showed good suppression of weeds with weed control etliciency of 93.7, 91.4 and 90.5%, respectively.”

✓ located verbatim in the source · abstract, characters 524–781 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 49–53 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fentra/amide at 120 g ha−1 suppressed weeds with 90.5% control efficiency.

Treatment
fentra/amide (120 g ha−1)e0
Outcome
weed control etliciencye0
Direction
suppressione0
Value
90.5%e0

Not reportedComparator

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

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

Verbatim

e0

“Pyrazosulfuron ethyl (20 g ha−1) applied at 10 DAS, pretilachlor + safener (750 g ha−1) applied at 7 DAS and fentra/amide (120 g ha−1) applied at 7 DAS also showed good suppression of weeds with weed control etliciency of 93.7, 91.4 and 90.5%, respectively.”

✓ located verbatim in the source · abstract, characters 524–781 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 49–53 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Weed competition reduced rice grain yield by more than 45% in weedy plots.

Treatment
competition with weedse0
Outcome
grain yield of ricee0
Direction
reductione0
Value
more than 45%e0

Not reportedComparator

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

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

Verbatim

e0

“There was more than 45%, reduction in the grain yield of rice due to competition with weeds in weedy plots.”

✓ located verbatim in the source · abstract, characters 782–889 · show in text ↑

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

  1. negative
  2. negative
  3. no effect

146 papers more in this group

See all 150 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

  1. negative
  2. positive
  3. positive

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

  1. negative
  2. negative
  3. negative

73 papers more in this group

See all 77 papers →

amide · weed · Oryza sativa (rice)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

competition · yield · Oryza sativa (rice)Results differ

47 papers: 4 positive, 43 negative or no effect

42 papers in the same direction as this paper · 4 in the opposite direction

  1. negative
  2. positive
  3. positive

43 papers more in this group

See all 47 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.