Abstract
Field experiment under dry direct seeded rice(Oryza sativa L.) was conducted during rainy season of 2010 and 2011 at Regional Agriculture Research Station (RARS), Parwanipur, Bara to develop appropriate weed management practices for dry direct- seeded rice. The trial was laid-out in randomized complete block design (RCBD) and replicated thrice. Observations were taken on weed, plant growth and yield attributing, yield, and socio-economic parameters. The weed density, dry weed weight and weed control efficiency resulted significantly different as influenced by integrated weed management practices. Low weed population density, low weed index and highest weed control efficiency resulted by pendimethalin followed by 2, 4- D followed by one hand weeding were at par with weed free check. Highest yield resulted from weed free plot followed by pendimethalin followed by two hand weeding and pendimethalin followed by 2, 4- D followed by one hand weeding. However, the net return per unit investment resulted highest in pendimethalin followed by 2, 4- D followed by one hand weeding. This proved that amid increasing wage rate and labour scarcity integrated weed management through pendimethalin 30 EC (Stomp) @1 kg a. i. /ha as pre- emergence herbicide application followed by 2, 4- D sodium salt 80 WP @ 0.5 kg a. i. /ha followed by one hand weeding or stale seed bed followed by pendimethalin 30 EC (Stomp) @1 kg a. i. /ha followed by bispyribac (Nominee gold) @25 g a. i. /ha 10% @200 ml/ha at 20 days of seeding resulted best alternative for manual hand weeding practices giving higher net return per unit investment. DOI: http://dx.doi.org/10.3126/njst.v14i2.10413 Nepal Journal of Science and Technology Vol. 14, No. 2 (2013) 33-42
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Claims 10
Claim · model-written summary
Integrated weed management practices significantly differed in weed density, dry weed weight and weed control efficiency.
- Taxon
- Rice
Oryza sativat0 - Treatment
- integrated weed management practicese0
- Outcome
- weed density, dry weed weight and weed control efficiencye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weed density, dry weed weight and weed control efficiency resulted significantly different as influenced by integrated weed management practices”
t0“Rice”
Claim · model-written summary
The pendimethalin, 2, 4-D and hand-weeding sequence produced low weed population density, comparable with weed-free plots.
- Taxon
- RiceOryza sativat0
- Treatment
- pendimethalin followed by 2, 4- D followed by one hand weedinge0
- Outcome
- weed population densitye0
- Direction
- Lowe0
- Comparator
- weed free checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low weed population density, low weed index and highest weed control efficiency resulted by pendimethalin followed by 2, 4- D followed by one hand weeding were at par with weed free check”
t0“Rice”
Claim · model-written summary
The same sequence produced a low weed index comparable with weed-free plots.
- Taxon
- RiceOryza sativat0
- Treatment
- pendimethalin followed by 2, 4- D followed by one hand weedinge0
- Outcome
- weed indexe0
- Direction
- lowe0
- Comparator
- weed free checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low weed population density, low weed index and highest weed control efficiency resulted by pendimethalin followed by 2, 4- D followed by one hand weeding were at par with weed free check”
t0“Rice”
Claim · model-written summary
The same sequence produced the highest weed control efficiency, comparable with weed-free plots.
- Taxon
- RiceOryza sativat0
- Treatment
- pendimethalin followed by 2, 4- D followed by one hand weedinge0
- Outcome
- weed control efficiencye0
- Direction
- higheste0
- Comparator
- weed free checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low weed population density, low weed index and highest weed control efficiency resulted by pendimethalin followed by 2, 4- D followed by one hand weeding were at par with weed free check”
t0“Rice”
Claim · model-written summary
Rice yield was highest in weed-free plots.
- Taxon
- RiceOryza sativat0
- Treatment
- weed free plote0
- Outcome
- yielde0
- Direction
- Higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest yield resulted from weed free plot followed by pendimethalin followed by two hand weeding and pendimethalin followed by 2, 4- D followed by one hand weeding”
t0“Rice”
Claim · model-written summary
Pendimethalin followed by two hand weedings ranked next for yield.
- Taxon
- RiceOryza sativat0
- Treatment
- pendimethalin followed by two hand weedinge0
- Outcome
- yielde0
- Comparator
- weed free plote0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest yield resulted from weed free plot followed by pendimethalin followed by two hand weeding and pendimethalin followed by 2, 4- D followed by one hand weeding”
t0“Rice”
Claim · model-written summary
Pendimethalin followed by 2, 4-D and one hand weeding was also among the leading yield treatments.
- Taxon
- RiceOryza sativat0
- Treatment
- pendimethalin followed by 2, 4- D followed by one hand weedinge0
- Outcome
- yielde0
- Comparator
- weed free plote0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest yield resulted from weed free plot followed by pendimethalin followed by two hand weeding and pendimethalin followed by 2, 4- D followed by one hand weeding”
t0“Rice”
Claim · model-written summary
Net return per unit investment was highest with pendimethalin followed by 2, 4-D and one hand weeding.
- Taxon
- RiceOryza sativat0
- Treatment
- pendimethalin followed by 2, 4- D followed by one hand weedinge0
- Outcome
- net return per unit investmente0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the net return per unit investment resulted highest in pendimethalin followed by 2, 4- D followed by one hand weeding”
t0“Rice”
Claim · model-written summary
The authors recommend the pendimethalin, 2, 4-D and one hand-weeding sequence as an alternative to manual hand weeding for higher return.
- Taxon
- RiceOryza sativat0
- Treatment
- pendimethalin 30 EC (Stomp) @1 kg a. i. /ha as pre- emergence herbicide application followed by 2, 4- D sodium salt 80 WP @ 0.5 kg a. i. /ha followed by one hand weedinge0
- Outcome
- best alternative for manual hand weeding practices giving higher net return per unit investmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“integrated weed management through pendimethalin 30 EC (Stomp) @1 kg a. i. /ha as pre- emergence herbicide application followed by 2, 4- D sodium salt 80 WP @ 0.5 kg a. i. /ha followed by one hand weeding or stale seed bed followed by pendimethalin 30 EC (Stomp) @1 kg a. i. /ha followed by bispyribac (Nominee gold) @25 g a. i. /ha 10% @200 ml/ha at 20 days of seeding resulted best alternative for manual hand weeding practices giving higher net return per unit investment”
t0“Rice”
Claim · model-written summary
The authors also recommend the stale-seed-bed, pendimethalin and bispyribac sequence as an alternative to manual weeding for higher return.
- Taxon
- RiceOryza sativat0
- Treatment
- stale seed bed followed by pendimethalin 30 EC (Stomp) @1 kg a. i. /ha followed by bispyribac (Nominee gold) @25 g a. i. /ha 10% @200 ml/ha at 20 days of seedinge0
- Outcome
- best alternative for manual hand weeding practices giving higher net return per unit investmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stale seed bed followed by pendimethalin 30 EC (Stomp) @1 kg a. i. /ha followed by bispyribac (Nominee gold) @25 g a. i. /ha 10% @200 ml/ha at 20 days of seeding resulted best alternative for manual hand weeding practices giving higher net return per unit investment”
t0“Rice”
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