Abstract
Farmers' participatory field trials were conducted at Madhuban, and Taraori, the two participatory experimental sites/locations of the Cereal Systems Initiative for South Asia (CSISA), a collaborative project of IRRI and CIMMYT in Karnal district of Haryana, India, during Kharif (wet season) 2010 and 2011. This research aimed to evaluate preemergence (PRE) and postemergence (POST) herbicides for providing feasible and economically viable weed management options to farmers for predominant scented rice varieties. Treatments with pendimethalin PRE fb bispyribac-sodium + azimsulfuron POST had lower weed biomass at 45 days after sowing (DAS). At Madhuban, highest grain yield of scented basmati rice (3.43 t ha−1) was recorded with the sequential application of pendimethalin PRE fb bispyribac-sodium + azimsulfuron POST. However, at Taraori, yields were similar with pendimethalin or oxadiargyl PRE fb bispyribac-sodium and/or azimsulfuron POST. Applying oxadiargyl by mixing with sand onto flooded field was less effective than spray applications in non-flooded field. The benefit-cost ratio of rice crop was higher with herbicide treatments at both sites as compared with the non-treated weed-free check except single PRE and POST applications and sequential application of oxadiargyl PRE fb oxadiargyl PRE. In a separate experiment conducted at Nagla and Taraori sites, scented rice cultivars' ('CSR 30′ and 'Pusa 1121′) tolerance to three rates of azimsulfuron (15, 25, and 35 g ai ha−1) was evaluated over two years (2010 and 2011). CSR 30 (superfine, scented) was more sensitive to higher rates (35 g ai ha−1) of azimsulfuron as compared to Pusa 1121 (fine, scented). Crop injuries were 8 and 28% in case of CSR 30; 5 and 15% in Pusa 1121 when applied with azimsulfuron 25 and 35 g ai ha−1, respectively. Azimsulfuron applied at 35 g ai ha−1 reduced yield in both cultivars but in CSR 30 yield reduction was twofold (11.5%) as that of Pusa 1121 (5.2%).
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Claims 12
Claim · model-written summary
Sequential pendimethalin followed by bispyribac-sodium plus azimsulfuron lowered weed biomass at 45 days after sowing.
- Taxon
- dry direct-seeded ricet0
- Organ / stage
- 45 days after sowing (DAS)e0
- Treatment
- pendimethalin PRE fb bispyribac-sodium + azimsulfuron POSTe0
- Outcome
- weed biomasse0
- Direction
- lowere0
Not reportedComparator
Verbatim
e0“Treatments with pendimethalin PRE fb bispyribac-sodium + azimsulfuron POST had lower weed biomass at 45 days after sowing (DAS).”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
Claim · model-written summary
At Madhuban, sequential pendimethalin followed by bispyribac-sodium plus azimsulfuron produced the highest scented basmati rice grain yield, 3.43 t ha−1.
- Taxon
- scented basmati ricee0
- Treatment
- pendimethalin PRE fb bispyribac-sodium + azimsulfuron POSTe0
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 3.43 t ha−1e0
- Setting
- Madhubane0
Not reportedComparator
Verbatim
e0“At Madhuban, highest grain yield of scented basmati rice (3.43 t ha−1) was recorded with the sequential application of pendimethalin PRE fb bispyribac-sodium + azimsulfuron POST.”
Claim · model-written summary
At Taraori, rice yields were similar under pendimethalin or oxadiargyl preemergence followed by bispyribac-sodium and/or azimsulfuron postemergence.
Verbatim
e0“However, at Taraori, yields were similar with pendimethalin or oxadiargyl PRE fb bispyribac-sodium and/or azimsulfuron POST.”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
Claim · model-written summary
Oxadiargyl mixed with sand and applied to a flooded field was less effective than spray application to a non-flooded field.
Verbatim
e0“Applying oxadiargyl by mixing with sand onto flooded field was less effective than spray applications in non-flooded field.”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
Claim · model-written summary
Herbicide treatments generally had a higher rice benefit-cost ratio than the non-treated weed-free check at both sites, apart from the listed exceptions.
- Taxon
- rice
Oryza sativae0 - Treatment
- herbicide treatmentse0
- Outcome
- benefit-cost ratioe0
- Direction
- highere0
- Qualifier
- except single PRE and POST applications and sequential application of oxadiargyl PRE fb oxadiargyl PREe0
- Comparator
- non-treated weed-free checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The benefit-cost ratio of rice crop was higher with herbicide treatments at both sites as compared with the non-treated weed-free check except single PRE and POST applications and sequential application of oxadiargyl PRE fb oxadiargyl PRE.”
Claim · model-written summary
CSR 30 was more sensitive than Pusa 1121 to azimsulfuron at 35 g ai ha−1.
Verbatim
e0“CSR 30 (superfine, scented) was more sensitive to higher rates (35 g ai ha−1) of azimsulfuron as compared to Pusa 1121 (fine, scented).”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
Claim · model-written summary
CSR 30 had 8% crop injury at 25 g ai ha−1 azimsulfuron.
- Taxon
- dry direct-seeded ricet0
- Material
- CSR 30e0
- Treatment
- azimsulfuron 25 and 35 g ai ha−1e0
- Outcome
- Crop injuriese0
- Value
- 8%e0
- Qualifier
- 25e0
Not reportedComparatorDirection
Verbatim
e0“Crop injuries were 8 and 28% in case of CSR 30; 5 and 15% in Pusa 1121 when applied with azimsulfuron 25 and 35 g ai ha−1, respectively.”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
Claim · model-written summary
CSR 30 had 28% crop injury at 35 g ai ha−1 azimsulfuron.
- Taxon
- dry direct-seeded ricet0
- Material
- CSR 30e0
- Treatment
- azimsulfuron 25 and 35 g ai ha−1e0
- Outcome
- Crop injuriese0
- Value
- 28%e0
- Qualifier
- 35 g ai ha−1e0
Not reportedComparatorDirection
Verbatim
e0“Crop injuries were 8 and 28% in case of CSR 30; 5 and 15% in Pusa 1121 when applied with azimsulfuron 25 and 35 g ai ha−1, respectively.”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
Claim · model-written summary
Pusa 1121 had 5% crop injury at 25 g ai ha−1 azimsulfuron.
- Taxon
- dry direct-seeded ricet0
- Material
- Pusa 1121e0
- Treatment
- azimsulfuron 25 and 35 g ai ha−1e0
- Outcome
- Crop injuriese0
- Value
- 5%e0
- Qualifier
- 25e0
Not reportedComparatorDirection
Verbatim
e0“Crop injuries were 8 and 28% in case of CSR 30; 5 and 15% in Pusa 1121 when applied with azimsulfuron 25 and 35 g ai ha−1, respectively.”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
Claim · model-written summary
Pusa 1121 had 15% crop injury at 35 g ai ha−1 azimsulfuron.
- Taxon
- dry direct-seeded ricet0
- Material
- Pusa 1121e0
- Treatment
- azimsulfuron 25 and 35 g ai ha−1e0
- Outcome
- Crop injuriese0
- Value
- 15%e0
- Qualifier
- 35 g ai ha−1e0
Not reportedComparatorDirection
Verbatim
e0“Crop injuries were 8 and 28% in case of CSR 30; 5 and 15% in Pusa 1121 when applied with azimsulfuron 25 and 35 g ai ha−1, respectively.”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
Claim · model-written summary
Azimsulfuron at 35 g ai ha−1 reduced CSR 30 yield by 11.5%.
- Taxon
- dry direct-seeded ricet0
- Material
- CSR 30e0
- Treatment
- Azimsulfuron applied at 35 g ai ha−1e0
- Outcome
- yielde0
- Direction
- reducede0
- Value
- 11.5%e0
Not reportedComparator
Verbatim
e0“Azimsulfuron applied at 35 g ai ha−1 reduced yield in both cultivars but in CSR 30 yield reduction was twofold (11.5%) as that of Pusa 1121 (5.2%).”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
Claim · model-written summary
Azimsulfuron at 35 g ai ha−1 reduced Pusa 1121 yield by 5.2%.
- Taxon
- dry direct-seeded ricet0
- Material
- Pusa 1121e0
- Treatment
- Azimsulfuron applied at 35 g ai ha−1e0
- Outcome
- yielde0
- Direction
- reducede0
- Value
- 5.2%e0
Not reportedComparator
Verbatim
e0“Azimsulfuron applied at 35 g ai ha−1 reduced yield in both cultivars but in CSR 30 yield reduction was twofold (11.5%) as that of Pusa 1121 (5.2%).”
t0“Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains”
The same questions in other papers
herbicide · yield · Oryza sativa (rice)Positive and negative results
724 papers in the same direction as this paper · 57 in the opposite direction · 20 reporting no difference from an alternative
- no effect
- positive
- positive
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