Abstract
Abstract Field experiments were conducted to determine the effectiveness of herbicides in controlling Rottboellia cochinchinensis (Lour.) W. D. Clayton and Cyperus rotundus L. in upland rice (Oryza sativa L.) at different moisture regimes as imposed by a line source sprinkler system. Preemergence application of pendimethalin [N‐(1‐ethylpropyl)‐3,4‐dimethyl‐2,6‐dinitrobenzenamine] was highly effective in controlling R. cochinchinensis irrespective of soil moisture after herbicide application. Bentazon [3‐(1‐methylethyl)‐(1H)‐2,1,3‐benzothiadiazin‐4(3H)‐one 2,2‐dioxide] and 2,4‐D [(2,4‐dichlorophenoxy)acetic acid] applied at postemergence effectively controlled C. rotundus when moisture supply was well above pan evaporation. These herbicides also had no adverse effect on rice stand and resulted in higher yield over the control. Water application rates above upland pan evaporation for a season‐long period was essential to obtain a high response to weed control either by herbicides or hand weeding. The data suggest that proper weed control by herbicides or hand weeding will not result in high upland rice grain yields if moisture level from rains fall below the critical level.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Preemergence pendimethalin was highly effective in controlling R. cochinchinensis irrespective of soil moisture.
- Taxon
- upland rice
Oryza sativat0 - Treatment
- Preemergence application of pendimethaline2
- Interactor
- R. cochinchinensis
Rottboellia cochinchinensise1weed - Outcome
- controlling R. cochinchinensise1
- Direction
- decreaseinferrede1
- Qualifier
- irrespective of soil moisture after herbicide applicatione1
- Setting
- Field experimentse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e2“Preemergence application of pendimethalin”
e1“was highly effective in controlling R. cochinchinensis irrespective of soil moisture after herbicide application”
e3“Field experiments were conducted to determine the effectiveness of herbicides in controlling Rottboellia cochinchinensis”
Claim · model-written summary
Postemergence bentazon effectively controlled C. rotundus when moisture supply was well above pan evaporation.
- Taxon
- upland riceOryza sativat0
- Treatment
- Bentazone5
- Interactor
- C. rotundus
Cyperus rotunduse4weed - Outcome
- effectively controlled C. rotunduse4
- Direction
- decreaseinferrede4
- Qualifier
- when moisture supply was well above pan evaporatione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e4“applied at postemergence effectively controlled C. rotundus when moisture supply was well above pan evaporation”
e5“Bentazon”
Claim · model-written summary
The postemergence herbicides had no adverse effect on upland rice stand.
- Taxon
- upland riceOryza sativat0
- Treatment
- These herbicidese7
- Outcome
- rice stande7
- Direction
- no_changeinferrede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e7“These herbicides also had no adverse effect on rice stand and resulted in higher yield over the control”
Claim · model-written summary
The postemergence herbicides resulted in higher upland rice yield than the control.
- Taxon
- upland riceOryza sativat0
- Treatment
- These herbicidese7
- Outcome
- yielde7
- Direction
- highere7
- Comparator
- controle7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e7“These herbicides also had no adverse effect on rice stand and resulted in higher yield over the control”
Claim · model-written summary
Water application above upland pan evaporation for a season-long period was essential for a high response to weed control.
- Taxon
- upland riceOryza sativat0
- Treatment
- Water application rates above upland pan evaporatione2
- Outcome
- high response to weed controle1
- Direction
- increaseinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e1“was essential to obtain a high response to weed control either by herbicides or hand weeding”
e2“Water application rates above upland pan evaporation”
Claim · model-written summary
Weed control alone will not give high upland rice grain yields if rain-fed moisture falls below the critical level.
- Taxon
- upland riceOryza sativat0
- Treatment
- proper weed control by herbicides or hand weedinge1
- Outcome
- high upland rice grain yieldse1
- Direction
- decreaseinferrede1
- Qualifier
- if moisture level from rains fall below the critical levele1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e1“proper weed control by herbicides or hand weeding will not result in high upland rice grain yields if moisture level from rains fall below the critical level”
The same questions in other papers
herbicide · organism · Oryza sativa (rice)Positive and negative results
2 papers in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
18 papers more in this group
See all 22 papers →herbicide · yield · Oryza sativa (rice)Positive and negative results
724 papers in the same direction as this paper · 57 in the opposite direction · 20 reporting no difference from an alternative
- no effect
- negative
- negative
798 papers more in this group
See all 802 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.