Abstract
A field experiment was conducted in the low country of Sri Lanka, during the period 1994–1995 to investigate the severity of weed infestation and tea growth in relation to weed management methods in newly established tea ( Camellia sinensis [L.] Kuntze). Manual weeding (hand and slash weeding) at various intervals was compared with various herbicides, with or without mulching. Weed control with herbicides was superior to that of hand weeding at 6‐week intervals or more. Weed control with oxyfluorfen at 0.29 kg ai ha −1 + paraquat at 0.17 kg ai ha −1 or glyphosate at 0.99 kg ai ha −1 + kaolin at 3.42 kg ha −1 were superior. Plots unweeded for 12 weeks or more produced significantly greater ( P < 0.05) weed biomass than plots unweeded for 6 weeks. Although the least weed dry weight ( P < 0.05) and the greatest number of weed species were recorded with hand weeding at 2 week intervals, there was no particular benefit on tea growth when compared with hand weeding at 6 and 12 week intervals. Inter row mulching in chemically treated plots was more favorable for tea growth than no mulching, while living weed cover in unmulched slash weeded plots suppressed tea growth. A combination of mulching and herbicides, particularly oxyfluorfen and paraquat, followed by hand weeding at least every 6–8 weeks was considered the most appropriate weed management system for young tea.
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Claims 10
Claim · model-written summary
Herbicide weed control was superior to hand weeding at 6-week intervals or more.
- Taxon
- Camellia sinensis
Camellia sinensise0 - Treatment
- herbicidese2
- Outcome
- Weed controle2
- Direction
- superiore2
- Comparator
- hand weeding at 6‐week intervals or moree2
- Setting
- low country of Sri Lankae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“newly established tea ( Camellia sinensis [L.] Kuntze)”
e1“A field experiment was conducted in the low country of Sri Lanka”
e2“Weed control with herbicides was superior to that of hand weeding at 6‐week intervals or more”
Claim · model-written summary
Oxyfluorfen plus paraquat gave superior weed control.
- Taxon
- Camellia sinensisCamellia sinensise0
- Treatment
- oxyfluorfen at 0.29 kg ai ha −1 + paraquat at 0.17 kg ai ha −1e3
- Outcome
- Weed controle3
- Direction
- superiore3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“newly established tea ( Camellia sinensis [L.] Kuntze)”
e3“Weed control with oxyfluorfen at 0.29 kg ai ha −1 + paraquat at 0.17 kg ai ha −1 or glyphosate at 0.99 kg ai ha −1 + kaolin at 3.42 kg ha −1 were superior”
Claim · model-written summary
Glyphosate plus kaolin gave superior weed control.
- Taxon
- Camellia sinensisCamellia sinensise0
- Treatment
- glyphosate at 0.99 kg ai ha −1 + kaolin at 3.42 kg ha −1e3
- Outcome
- Weed controle3
- Direction
- superiore3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“newly established tea ( Camellia sinensis [L.] Kuntze)”
e3“Weed control with oxyfluorfen at 0.29 kg ai ha −1 + paraquat at 0.17 kg ai ha −1 or glyphosate at 0.99 kg ai ha −1 + kaolin at 3.42 kg ha −1 were superior”
Claim · model-written summary
Plots unweeded for 12 weeks or more had significantly greater weed biomass than plots unweeded for 6 weeks.
- Taxon
- Camellia sinensisCamellia sinensise0
- Treatment
- unweeded for 12 weeks or moree4
- Interactor
- weede4weed
- Outcome
- weed biomasse4
- Direction
- greatere4
- Comparator
- unweeded for 6 weekse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“newly established tea ( Camellia sinensis [L.] Kuntze)”
e4“Plots unweeded for 12 weeks or more produced significantly greater ( P < 0.05) weed biomass than plots unweeded for 6 weeks”
Claim · model-written summary
Hand weeding every 2 weeks gave the least weed dry weight.
- Taxon
- Camellia sinensisCamellia sinensise0
- Treatment
- hand weeding at 2 week intervalse5
- Interactor
- weede5weed
- Outcome
- weed dry weighte5
- Direction
- leaste5
- Comparator
- hand weeding at 6 and 12 week intervalse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“newly established tea ( Camellia sinensis [L.] Kuntze)”
e5“Although the least weed dry weight ( P < 0.05) and the greatest number of weed species were recorded with hand weeding at 2 week intervals, there was no particular benefit on tea growth when compared with hand weeding at 6 and 12 week intervals”
Claim · model-written summary
Hand weeding every 2 weeks recorded the greatest number of weed species.
- Taxon
- Camellia sinensisCamellia sinensise0
- Treatment
- hand weeding at 2 week intervalse5
- Outcome
- number of weed speciese5
- Direction
- greateste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“newly established tea ( Camellia sinensis [L.] Kuntze)”
e5“Although the least weed dry weight ( P < 0.05) and the greatest number of weed species were recorded with hand weeding at 2 week intervals, there was no particular benefit on tea growth when compared with hand weeding at 6 and 12 week intervals”
Claim · model-written summary
Hand weeding every 2 weeks gave no particular benefit on tea growth compared with 6- and 12-week intervals.
- Taxon
- Camellia sinensisCamellia sinensise0
- Treatment
- hand weeding at 2 week intervalse5
- Outcome
- tea growthe5
- Direction
- no particular benefite5
- Comparator
- hand weeding at 6 and 12 week intervalse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“newly established tea ( Camellia sinensis [L.] Kuntze)”
e5“Although the least weed dry weight ( P < 0.05) and the greatest number of weed species were recorded with hand weeding at 2 week intervals, there was no particular benefit on tea growth when compared with hand weeding at 6 and 12 week intervals”
Claim · model-written summary
Inter-row mulching in chemically treated plots was more favourable for tea growth than no mulching.
- Taxon
- Camellia sinensisCamellia sinensise0
- Treatment
- Inter row mulching in chemically treated plotse6
- Outcome
- tea growthe6
- Direction
- more favorablee6
- Comparator
- no mulchinge6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“newly established tea ( Camellia sinensis [L.] Kuntze)”
e6“Inter row mulching in chemically treated plots was more favorable for tea growth than no mulching, while living weed cover in unmulched slash weeded plots suppressed tea growth”
Claim · model-written summary
Living weed cover in unmulched slash-weeded plots suppressed tea growth.
- Taxon
- Camellia sinensisCamellia sinensise0
- Treatment
- living weed cover in unmulched slash weeded plotse6
- Interactor
- weede6weed
- Outcome
- tea growthe6
- Direction
- suppressede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“newly established tea ( Camellia sinensis [L.] Kuntze)”
e6“Inter row mulching in chemically treated plots was more favorable for tea growth than no mulching, while living weed cover in unmulched slash weeded plots suppressed tea growth”
Claim · model-written summary
Mulching and herbicides followed by hand weeding at least every 6–8 weeks is the most appropriate weed management system for young tea.
Verbatim
e7“A combination of mulching and herbicides, particularly oxyfluorfen and paraquat, followed by hand weeding at least every 6–8 weeks was considered the most appropriate weed management system for young tea”
The same questions in other papers
paraquat · weed · Camellia sinensis (black tea)Positive and negative results
1 in the opposite direction
- negative
glyphosate · weed · Camellia sinensis (black tea)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- positive
1 paper more in this group
See all 5 papers →mulching · growth · Camellia sinensis (black tea)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
herbicide · weed · Camellia sinensis (black tea)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.