Abstract
Direct seeded rice is an emerging production technology in India due to less requirement of water, labour and capital input initially. But direct seeded rice face severe infestation of weeds. A field experiment was conducted during the kharif 2012 at Students’ Farm of College of Agriculture, CCS Haryana Agricultural University; Kaul campus (Kaithal) to study the performance of sequential application of herbicides on weed flora in direct seeded rice. The herbicidal treatments included two pre emergence herbicides i.e. pendimethalin 1000 g/ha and oxadiargyl 100 g/ ha and four post emergence herbicides (bispyribac sodium 25 g/ha, fenoxaprop 67 g/ha, ethoxysulfuron 18.75 g/ha and metsulfuron methyl 10% + chlorimuron ethyl 10% WP ready mix (Almix) 4 g/ha). Weed free and weedy check were also included. The results showed that grasses were the dominant weed flora (49 %) followed by sedges (34%) and broad leaf weeds (17%).Sequential application of pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha and metsulfuron methyl + chlorimuron ethyl RM (Almix) 4 g/ha gave significantly lower weed density (p=0.05) and higher weed control efficiency which resulted in more number of effective tillers (209.3), filled grains/panicle (83.7) and grain yield (3.97 t/ha).
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Claims 8
Claim · model-written summary
Grasses made up 49% of the weed flora.
- Taxon
- rice
Oryza sativat0 - Outcome
- grasses were the dominant weed florae0
- Value
- 49 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grasses were the dominant weed flora (49 %)”
t0“rice”
Claim · model-written summary
Sedges made up 34% of the weed flora.
- Taxon
- riceOryza sativat0
- Outcome
- sedgese0
- Value
- 34%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sedges (34%)”
t0“rice”
Claim · model-written summary
Broad leaf weeds made up 17% of the weed flora.
- Taxon
- riceOryza sativat0
- Outcome
- broad leaf weedse0
- Value
- 17%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broad leaf weeds (17%)”
t0“rice”
Claim · model-written summary
Sequential herbicide application significantly lowered weed density.
- Taxon
- riceOryza sativat0
- Treatment
- Sequential application of pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha and metsulfuron methyl + chlorimuron ethyl RM (Almix) 4 g/hae0
- Interactor
- weedse1weed
- Outcome
- weed densitye0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sequential application of pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha and metsulfuron methyl + chlorimuron ethyl RM (Almix) 4 g/ha gave significantly lower weed density (p=0.05)”
e1“broad leaf weeds (17%)”
t0“rice”
Claim · model-written summary
Sequential herbicide application increased weed control efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- Sequential application of pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha and metsulfuron methyl + chlorimuron ethyl RM (Almix) 4 g/hae0
- Interactor
- weedse1weed
- Outcome
- weed control efficiencye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sequential application of pendimethalin 1000 g/ha fb bispyribac sodium 25 g/ha and metsulfuron methyl + chlorimuron ethyl RM (Almix) 4 g/ha gave significantly lower weed density (p=0.05) and higher weed control efficiency”
e1“broad leaf weeds (17%)”
t0“rice”
Claim · model-written summary
The herbicide sequence produced 209.3 effective tillers.
- Taxon
- riceOryza sativat0
- Outcome
- effective tillerse0
- Direction
- moree0
- Value
- 209.3e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which resulted in more number of effective tillers (209.3)”
t0“rice”
Claim · model-written summary
The herbicide sequence produced 83.7 filled grains per panicle.
- Taxon
- riceOryza sativat0
- Outcome
- filled grains/paniclee0
- Direction
- higherinferrede0
- Value
- 83.7e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“filled grains/panicle (83.7)”
t0“rice”
Claim · model-written summary
The herbicide sequence produced grain yield of 3.97 t/ha.
- Taxon
- riceOryza sativat0
- Outcome
- grain yielde0
- Direction
- higherinferrede0
- Value
- 3.97 t/hae0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield (3.97 t/ha)”
t0“rice”
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