Abstract
Weed infestation is a major problem in the aerobic rice system due to the lack of standing water that could prevent the growth of weeds. To reduce heavy reliance on herbicide, this research aims to determine the potential of cassava allelopathy for inhibition of weeds in aerobic rice. The allelopathic potential of cassava extracts on the germination and growth of tested weed species (Eleusine indica, Ageratum conyzoides, and Cyperus distans) and aerobic rice (Oryza sativa) was conducted in the laboratory. The results showed that increasing the aqueous extract concentrations of cassava extracts inhibited the germination and seedling growth of tested weeds, suggesting the allelopathic effects of cassava extracts are concentration dependent. The degree of phytotoxicity of different vegetative parts of cassava can be classified in order of decreasing inhibition as follows: leaf, stem, tuber, and tuber peel. Aqueous leaf extract of cassava at a concentration of 0.5% (w/v) provided complete inhibition on A. conyzoides, E. indica, and C. distansgermination whereas 25% to 100% inhibition on the shoot growth was recorded. By contrast, the shoot growth and germination of aerobic rice were not affected. These results suggest that the cassava leaf extracts contain water-soluble allelochemicals for inhibition on A. conyzoides, E. indica, and C. distans in aerobic rice.
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 7
Claim · model-written summary
Higher cassava extract concentrations inhibited weed germination and seedling growth.
- Taxon
- aerobic ricet0
- Treatment
- increasing the aqueous extract concentrations of cassava extractse0
- Interactor
- tested weedse0weed
- Outcome
- germination and seedling growth of tested weedse0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“increasing the aqueous extract concentrations of cassava extracts inhibited the germination and seedling growth of tested weeds”
t0“Aerobic Rice”
Claim · model-written summary
Cassava parts ranked leaf, stem, tuber and tuber peel by decreasing inhibition.
Verbatim
e0“The degree of phytotoxicity of different vegetative parts of cassava can be classified in order of decreasing inhibition as follows: leaf, stem, tuber, and tuber peel.”
t0“Aerobic Rice”
Claim · model-written summary
Cassava leaf extract completely inhibited A. conyzoides germination.
- Taxon
- Aerobic Ricet0
- Treatment
- Aqueous leaf extract of cassava at a concentration of 0.5% (w/v)e0
- Interactor
- A. conyzoides
Ageratum conyzoidese0weed - Outcome
- A. conyzoidese0
- Direction
- complete inhibitione0
- Value
- 0.5% (w/v)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aqueous leaf extract of cassava at a concentration of 0.5% (w/v) provided complete inhibition on A. conyzoides, E. indica, and C. distansgermination”
t0“Aerobic Rice”
Claim · model-written summary
Cassava leaf extract completely inhibited E. indica germination.
- Taxon
- Aerobic Ricet0
- Treatment
- Aqueous leaf extract of cassava at a concentration of 0.5% (w/v)e0
- Interactor
- E. indica
Eleusine indicae0weed - Outcome
- E. indicae0
- Direction
- complete inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aqueous leaf extract of cassava at a concentration of 0.5% (w/v) provided complete inhibition on A. conyzoides, E. indica, and C. distansgermination”
t0“Aerobic Rice”
Claim · model-written summary
Cassava leaf extract completely inhibited C. distans germination.
- Taxon
- Aerobic Ricet0
- Treatment
- Aqueous leaf extract of cassava at a concentration of 0.5% (w/v)e0
- Interactor
- C. distans
.jpg?width=60)
Cyperus distanse0weed - Outcome
- C. distansgerminatione0
- Direction
- complete inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Aqueous leaf extract of cassava at a concentration of 0.5% (w/v) provided complete inhibition on A. conyzoides, E. indica, and C. distansgermination”
t0“Aerobic Rice”
Claim · model-written summary
Cassava leaf extract inhibited weed shoot growth by 25% to 100%.
Not reportedTreatmentComparator
Verbatim
e0“25% to 100% inhibition on the shoot growth was recorded.”
t0“Aerobic Rice”
Claim · model-written summary
Cassava extract did not affect aerobic rice shoot growth or germination.
Not reportedTreatmentComparator
Verbatim
e0“the shoot growth and germination of aerobic rice were not affected.”
The same questions in other papers
Manihot esculenta · weed · Oryza sativa (rice)Results agree
2 papers in the same direction as this paper
- positive
- positive
botanical · weed · Oryza sativa (rice)Positive and negative results
24 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- negative
23 papers more in this group
See all 27 papers →botanical · Ageratum conyzoides · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- 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.