Abstract
Rice (Oryza sativa L.) is the most important crop in Nepal, despite having significant contribution to food security and agricultural economy, its production is being affected greatly by weed infestation. A field experiment was conducted during the spring season of 2022 to evaluate the different weed management practices in transplanted spring rice at Radhapur, Banke, Nepal. Seven weed management treatments were laid in Randomized Complete Block Design (RCBD) with three replications. The treatments were pre-emergence application of Pendimethalin 50% EC, 1 kg a.i./ha, at 3 DAT, post-emergence application of Bispyribac Na 10% SC, 25 g a.i./ha, at 28 DAT, pre-emergence application of Pendimethalin followed by post-emergence Bispyribac Na, Pre-emergence application of Pendimethalin followed by one hand weeding at 40 DAT and Farmer’s practice i.e. one hand weeding at 40 DAT along with two controls (weedy free and weedy check). The rice variety Hardinath-1 was used in the experiment. Data regarding the weed flora, weed density, weed dry weight, rice growth, yield attributes and yield was recorded and analyzed. Weed flora in the experimental plot comprised of 11 weed species viz. five were broadleaf weeds belonging to four families, four grasses belonging to Poaceae family whereas three sedges belonging to Cyperaceae family. Sedges weeds were dominant as compared to broadleaf and grasses. The highest number of effective tillers per m2 (413) and number of grains per panicle (101.33) were obtained in Pendimethalin followed by Bispyribac Na treated plot. The plot treated with combination of pre-emergence followed by post emergence recorded significantly the lowest weed density (9.67 weeds/m2) at 60 DAT. This treatment significantly gave higher grain (4780 kg/ha), straw yield (4318 kg/ha) yield, harvest index (52.55%), other traits like sterility (22.19%) was recorded least and thousand grains weight was significantly higher (23.61g). The yield on weedy check plot produced the lowest yield as compared to weed free plot. Sedges weeds such as Cyperus difformis, Cyperus iria and Fimbristylismiliaceae were dominant as compared to dicots such as Amaranthus spinosus, Chenopodium album and grasses such as Echinochloa crus-galli, Echinochloa colonum at the experimental field. The ultimate overall analysis revealed that the application of pre-emergence followed by post-emergence herbicide was the best treatment so far as compared to other weed management treatments considering various data regarding variables.
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Claims 13
Claim · model-written summary
The plot contained 11 weed species across broadleaf, grass, and sedge groups.
- Taxon
- rice
Oryza sativat0 - Interactor
- weed speciese0weed
- Outcome
- Weed flora in the experimental plote0
- Value
- 11 weed speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed flora in the experimental plot comprised of 11 weed species viz. five were broadleaf weeds belonging to four families, four grasses belonging to Poaceae family whereas three sedges belonging to Cyperaceae family.”
t0“rice”
Claim · model-written summary
Sedges dominated over broadleaf weeds and grasses.
- Taxon
- riceOryza sativat0
- Interactor
- Sedges weedse0weed
- Outcome
- Sedges weedse0
- Direction
- dominante0
- Comparator
- broadleaf and grassese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sedges weeds were dominant as compared to broadleaf and grasses.”
t0“rice”
Claim · model-written summary
Sequential Pendimethalin and Bispyribac Na produced the most effective tillers.
- Taxon
- riceOryza sativat0
- Treatment
- Pendimethalin followed by Bispyribac Nae0
- Outcome
- number of effective tillers per m2e0
- Direction
- higheste0
- Value
- 413e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest number of effective tillers per m2 (413) and number of grains per panicle (101.33) were obtained in Pendimethalin followed by Bispyribac Na treated plot.”
t0“rice”
Claim · model-written summary
Sequential Pendimethalin and Bispyribac Na produced the most grains per panicle.
- Taxon
- riceOryza sativat0
- Treatment
- Pendimethalin followed by Bispyribac Nae0
- Outcome
- number of grains per paniclee0
- Direction
- higheste0
- Value
- 101.33e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest number of effective tillers per m2 (413) and number of grains per panicle (101.33) were obtained in Pendimethalin followed by Bispyribac Na treated plot.”
t0“rice”
Claim · model-written summary
Sequential pre- and post-emergence treatment had the lowest weed density at 60 DAT.
- Taxon
- riceOryza sativat0
- Treatment
- combination of pre-emergence followed by post emergencee0
- Interactor
- weede0weed
- Outcome
- weed densitye0
- Direction
- loweste0
- Value
- 9.67 weeds/m2e0
- Qualifier
- at 60 DATe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plot treated with combination of pre-emergence followed by post emergence recorded significantly the lowest weed density (9.67 weeds/m2) at 60 DAT.”
t0“rice”
Claim · model-written summary
Sequential herbicides increased grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment significantly gave higher grain (4780 kg/ha), straw yield (4318 kg/ha) yield, harvest index (52.55%), other traits like sterility (22.19%) was recorded least and thousand grains weight was significantly higher (23.61g).”
t0“rice”
Claim · model-written summary
Sequential herbicides increased straw yield.
- Taxon
- riceOryza sativat0
- Treatment
- This treatmente0
- Outcome
- straw yielde0
- Direction
- highere0
- Value
- 4318 kg/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment significantly gave higher grain (4780 kg/ha), straw yield (4318 kg/ha) yield, harvest index (52.55%), other traits like sterility (22.19%) was recorded least and thousand grains weight was significantly higher (23.61g).”
t0“rice”
Claim · model-written summary
Sequential herbicides produced a harvest index of 52.55%.
- Taxon
- riceOryza sativat0
- Outcome
- harvest indexe0
- Value
- 52.55%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“harvest index (52.55%)”
t0“rice”
Claim · model-written summary
Sequential herbicides had the least sterility.
- Taxon
- riceOryza sativat0
- Outcome
- sterilitye0
- Direction
- leaste0
- Value
- 22.19%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sterility (22.19%) was recorded least”
t0“rice”
Claim · model-written summary
Sequential herbicides increased thousand grain weight.
- Taxon
- riceOryza sativat0
- Outcome
- thousand grains weighte0
- Direction
- highere0
- Value
- 23.61ge0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thousand grains weight was significantly higher (23.61g)”
t0“rice”
Claim · model-written summary
The weedy check had lower yield than the weed-free plot.
- Taxon
- riceOryza sativat0
- Treatment
- weedy check plote0
- Outcome
- yielde0
- Direction
- loweste0
- Comparator
- weed free plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield on weedy check plot produced the lowest yield as compared to weed free plot.”
t0“rice”
Claim · model-written summary
Named sedge weeds dominated over named dicots and grasses.
- Taxon
- riceOryza sativat0
- Interactor
- Cyperus difformis
Cyperus difformise0weed - Outcome
- Sedges weedse0
- Direction
- dominante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sedges weeds such as Cyperus difformis, Cyperus iria and Fimbristylismiliaceae were dominant as compared to dicots such as Amaranthus spinosus, Chenopodium album and grasses such as Echinochloa crus-galli, Echinochloa colonum at the experimental field.”
t0“rice”
Claim · model-written summary
The authors rated sequential pre- and post-emergence herbicide as the best treatment overall.
- Taxon
- riceOryza sativat0
- Outcome
- application of pre-emergence followed by post-emergence herbicidee0
- Direction
- beste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ultimate overall analysis revealed that the application of pre-emergence followed by post-emergence herbicide was the best treatment so far as compared to other weed management treatments considering various data regarding variables.”
t0“rice”
The same questions in other papers
herbicide · weed · Oryza sativa (rice)Positive and negative results
578 papers in the same direction as this paper · 17 in the opposite direction · 7 reporting no difference from an alternative
- negative
- no effect
- negative
599 papers more in this group
See all 603 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.