Abstract
Weeds are the major biotic constraint in dry-direct seeded rice (DDSR), mainly due to the concurrent emergence and absence of water layer to suppress weeds. Therefore, strategy needs to be developed to get broad-spectrum weed control in DDSR. Experiments were conducted in rice (var. MTU 1010) during 2015-16 where sequential applications of pre- and post-emergence herbicides were evaluated for providing broad-spectrum weed management options in DDSR. Both the years, employing two-hand weedings at 15 and 30 DAS provided the lowest weed densities and weed dry weight at 75 DAS, whereas the maximum values of weeds were recorded in un-weeded plots. Among the herbicide-based weed management practices, application of pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha fb fenoxaprop 60 g/ha + chlorimuron + metsulfuron 4 g/ha at 30 DAS provided excellent weed control at 75 DAS, with 4.3% higher rice grain yield than two hand weedings at 15 and 30 DAS, pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha also provided good weed control and higher grain yield. Un-weeded plots noticed with considerable yield reduction of 79.5-83.3% over two hand weedings. Therefore, sequential application of pendimethalin 1000 g/ ha fb bispyribac sodium 25 g/ha is recommended along with need-based application of post-emergence herbicides (fenoxaprop 60 g/ha + chlorimuron + metsulfuron 4 g/ha) or one hand weeding to improve the weed control efficiency and provides economically higher productivity in DDSR.
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Claims 8
Claim · model-written summary
Two hand weedings at 15 and 30 DAS gave the lowest weed densities and weed dry weight at 75 DAS.
- Taxon
- rice
Oryza sativae0 - Material
- MTU 1010e0
- Treatment
- two-hand weedings at 15 and 30 DASe1
- Interactor
- weedse2weed
- Outcome
- weed densities and weed dry weight at 75 DASe1
- Direction
- loweste1
- Comparator
- un-weeded plotse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted in rice (var. MTU 1010)”
e1“Both the years, employing two-hand weedings at 15 and 30 DAS provided the lowest weed densities and weed dry weight at 75 DAS”
e2“whereas the maximum values of weeds were recorded in un-weeded plots”
Claim · model-written summary
Pendimethalin followed by bispyribac sodium, fenoxaprop, chlorimuron and metsulfuron at 30 DAS gave excellent weed control at 75 DAS.
- Taxon
- riceOryza sativae0
- Treatment
- pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha fb fenoxaprop 60 g/ha + chlorimuron + metsulfuron 4 g/ha at 30 DASe3
- Outcome
- weed control at 75 DASe3
- Direction
- excellente3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted in rice (var. MTU 1010)”
e3“application of pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha fb fenoxaprop 60 g/ha + chlorimuron + metsulfuron 4 g/ha at 30 DAS provided excellent weed control at 75 DAS”
Claim · model-written summary
The sequential herbicide programme gave 4.3% higher rice grain yield than two hand weedings at 15 and 30 DAS.
- Taxon
- riceOryza sativae0
- Treatment
- pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha fb fenoxaprop 60 g/ha + chlorimuron + metsulfuron 4 g/ha at 30 DASe3
- Outcome
- rice grain yielde4
- Direction
- highere4
- Value
- 4.3%e4
- Comparator
- two hand weedings at 15 and 30 DASe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted in rice (var. MTU 1010)”
e3“application of pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha fb fenoxaprop 60 g/ha + chlorimuron + metsulfuron 4 g/ha at 30 DAS provided excellent weed control at 75 DAS”
e4“with 4.3% higher rice grain yield than two hand weedings at 15 and 30 DAS”
Claim · model-written summary
Pendimethalin followed by bispyribac sodium gave good weed control.
- Taxon
- riceOryza sativae0
- Treatment
- pendimethalin 1000 g/ha fb bispyribac sodium 25 g/hae5
- Outcome
- weed controle5
- Direction
- goode5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted in rice (var. MTU 1010)”
e5“pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha also provided good weed control and higher grain yield”
Claim · model-written summary
Pendimethalin followed by bispyribac sodium gave higher grain yield.
- Taxon
- riceOryza sativae0
- Treatment
- pendimethalin 1000 g/ha fb bispyribac sodium 25 g/hae5
- Outcome
- grain yielde5
- Direction
- highere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted in rice (var. MTU 1010)”
e5“pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha also provided good weed control and higher grain yield”
Claim · model-written summary
Unweeded plots had a yield reduction of 79.5-83.3% compared with two hand weedings.
- Taxon
- riceOryza sativae0
- Treatment
- Un-weeded plotse6
- Outcome
- yielde6
- Direction
- reductione6
- Value
- 79.5-83.3%e6
- Comparator
- two hand weedingse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted in rice (var. MTU 1010)”
e6“Un-weeded plots noticed with considerable yield reduction of 79.5-83.3% over two hand weedings”
Claim · model-written summary
Sequential application of pendimethalin followed by bispyribac sodium is recommended for DDSR, with need-based post-emergence herbicides or one hand weeding.
- Taxon
- riceOryza sativae0
- Outcome
- sequential application of pendimethalin 1000 g/ ha fb bispyribac sodium 25 g/hae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted in rice (var. MTU 1010)”
e7“sequential application of pendimethalin 1000 g/ ha fb bispyribac sodium 25 g/ha is recommended”
Claim · model-written summary
The sequential herbicide programme provides economically higher productivity in DDSR.
- Taxon
- riceOryza sativae0
- Outcome
- productivitye1
- Direction
- highere1
- Qualifier
- economicallye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted in rice (var. MTU 1010)”
e1“provides economically higher productivity in DDSR”
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