Abstract
Allelochemicals have the potential to create friendly-eco products for weed management. Because synthetic herbicides pose worldwide risks to health and the environment, the need for alternative methods for weed control has become acute. This study evaluated the allelopatic potential of different sunflower cultivars on several crops and associated weeds at different concentrations. Factorial experiments were performed based on a completely randomized block design with three replications. The first factor included eight sunflower cultivars. The second factor was the concentration of the extracts (25, 50 and 100%). The third factor was the type of target plant (Amaranthus retroflexus, Portulaca oleracea, Lolium rigidum, Hordeum spontaneum, wheat and safflower). The results showed that Amaranthus retroflexus was the most sensitive to sunflower allelopathy, and P. oleracea was the most resistant. As extract concentration increased from 25 to 100%, the inhibitory effect on germination indices increased, while with 25% extract concentration was observed to have stimulating effects on wheat and Portulaca oleracea germination. The Megasun sunflower cultivar had the most effect and Hysun36 had the least effect on the target plants. Megasun extract at 100% concentration effectively suppressed over 80% of selected weeds. The results indicate that the allelopathic properties of some sunflower cultivars can affect noxious weed species such as H. spontaneum and L. rigidum in wheat and A. retroflexus in safflower.
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Claims 10
Claim · model-written summary
Amaranthus retroflexus was most sensitive to sunflower allelopathy.
- Taxon
- sunflower
Helianthus annuust0 - Interactor
- Amaranthus retroflexus
Amaranthus retroflexuse0weedt0 - Outcome
- Amaranthus retroflexus was the most sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amaranthus retroflexus was the most sensitive to sunflower allelopathy”
t0“sunflower on weed management in safflower and wheat”
Claim · model-written summary
P. oleracea was most resistant to sunflower allelopathy.
- Taxon
- sunflowerHelianthus annuust0
- Interactor
- P. oleracea
Portulaca oleraceae0weedt0 - Outcome
- P. oleracea was the most resistante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. oleracea was the most resistant”
t0“sunflower on weed management in safflower and wheat”
Claim · model-written summary
Increasing extract concentration increased inhibition of germination indices.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- extract concentratione0
- Outcome
- inhibitory effect on germination indicese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As extract concentration increased from 25 to 100%, the inhibitory effect on germination indices increased”
t0“sunflower on weed management in safflower and wheat”
Claim · model-written summary
A 25% extract stimulated wheat germination.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- 25% extract concentratione0
- Outcome
- germinatione0
- Direction
- stimulatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“25% extract concentration was observed to have stimulating effects on wheat and Portulaca oleracea germination”
Claim · model-written summary
A 25% extract stimulated Portulaca oleracea germination.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 25% extract concentratione0
- Interactor
- Portulaca oleraceaPortulaca oleraceae0weedt0
- Outcome
- Portulaca oleracea germinatione0
- Direction
- stimulatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“25% extract concentration was observed to have stimulating effects on wheat and Portulaca oleracea germination”
t0“sunflower”
Claim · model-written summary
Megasun had the strongest effect on target plants.
- Taxon
- sunflowerHelianthus annuuse0
- Material
- Megasune0
- Outcome
- most effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Megasun sunflower cultivar had the most effect and Hysun36 had the least effect on the target plants”
Claim · model-written summary
Hysun36 had the weakest effect on target plants.
- Taxon
- sunflowerHelianthus annuuse0
- Material
- Hysun36e0
- Outcome
- least effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Megasun sunflower cultivar had the most effect and Hysun36 had the least effect on the target plants”
Claim · model-written summary
Megasun extract at 100% suppressed over 80% of selected weeds.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Megasune0
- Treatment
- Megasun extract at 100% concentratione0
- Outcome
- selected weedse0
- Direction
- suppressede0
- Value
- over 80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Megasun extract at 100% concentration effectively suppressed over 80% of selected weeds”
t0“sunflower on weed management in safflower and wheat”
Claim · model-written summary
Some sunflower cultivars can affect H. spontaneum and L. rigidum weeds in wheat.
- Taxon
- wheatTriticum aestivume0
- Interactor
- H. spontaneum
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Hordeum vulgare subsp. spontaneume0weed - Second interactor
- L. rigidum
Lolium rigidume0weed - Outcome
- affect noxious weed speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“allelopathic properties of some sunflower cultivars can affect noxious weed species such as H. spontaneum and L. rigidum in wheat”
Claim · model-written summary
Some sunflower cultivars can affect A. retroflexus weeds in safflower.
- Taxon
- safflower
Carthamus tinctoriuse0 - Interactor
- A. retroflexusAmaranthus retroflexuse0weed
- Outcome
- affect noxious weed speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allelopathic properties of some sunflower cultivars can affect noxious weed species such as H. spontaneum and L. rigidum in wheat and A. retroflexus in safflower”
The same questions in other papers
botanical · Portulaca oleracea · Helianthus annuus (common sunflower)Positive and negative results
2 in the opposite direction
- positive
- positive
botanical · growth · Triticum aestivum (wheat)Positive and negative results
205 papers in the same direction as this paper · 228 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
431 papers more in this group
See all 435 papers →botanical · weed · Helianthus annuus (common sunflower)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.