Abstract
BACKGROUND: The allelochemical sorgoleone, a major component of the hydrophobic root exudates of Sorghum bicolor, was formulated as a wettable powder [4.6 WP] and evaluated as a natural herbicide on several weed and crop species under different growth conditions. RESULTS: Formulated sorgoleone [4.6 WP] suppressed germination and shoot growth of weeds, with broadleaf species showing greater susceptibility than grass weed species. Germination and growth of broadleaf weed species were completely suppressed (100%) at 0.2 g a.i. L(-1) sorgoleone in a growth chamber study. Post-emergence applications of the wettable formulation of sorgoleone [4.6 WP] inhibited 20-25% higher growth of weeds than pre-emergence applications under greenhouse conditions. Broadleaf weeds were more susceptible than grass species to both methods of application. In all studies, growth was suppressed in more than 90% of the broadleaf weeds and two species, in particular, Rumex japonicus and Plantago asiatica, were completely suppressed at 0.4 kg a.i. ha(-1) sorgoleone. The crop species, on the other hand, were much more tolerant to sorgoleone, with 30% inhibition, at most, at the highest rate of 0.4 kg a.i. ha(-1) sorgoleone. CONCLUSION: The results of this study reveal that sorgoleone, after formulation as a WP, is more effective in inhibiting weed growth, and crop species are tolerant to it. The strong weed suppressive ability of formulated sorgoleone therefore offers interesting possibilities as an effective natural environment-friendly approach for weed management.
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Claims 8
Claim · model-written summary
Formulated sorgoleone suppressed weed germination and shoot growth.
- Taxon
- Sorghum bicolor
Sorghum bicolore1 - Treatment
- Formulated sorgoleone [4.6 WP]e0
- Interactor
- weedse0weed
- Outcome
- germination and shoot growth of weedse0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Formulated sorgoleone [4.6 WP] suppressed germination and shoot growth of weeds, with broadleaf species showing greater susceptibility than grass weed species.”
e1“Sorghum bicolor”
Claim · model-written summary
Broadleaf weeds were more susceptible than grass weeds.
- Taxon
- Sorghum bicolorSorghum bicolore1
- Interactor
- broadleaf speciese0weed
- Outcome
- susceptibilitye0
- Direction
- greatere0
- Comparator
- grass weed speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broadleaf species showing greater susceptibility than grass weed species.”
e1“Sorghum bicolor”
Claim · model-written summary
At 0.2 g a.i. L(-1), sorgoleone completely suppressed broadleaf weed germination and growth in a growth chamber.
- Taxon
- Sorghum bicolorSorghum bicolore1
- Treatment
- 0.2 g a.i. L(-1) sorgoleonee0
- Interactor
- broadleaf weed speciese0weed
- Outcome
- Germination and growth of broadleaf weed speciese0
- Direction
- completely suppressede0
- Value
- 100%e0
- Setting
- growth chambere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination and growth of broadleaf weed species were completely suppressed (100%) at 0.2 g a.i. L(-1) sorgoleone in a growth chamber study.”
e1“Sorghum bicolor”
Claim · model-written summary
Postemergence application inhibited weed growth 20-25% more than preemergence application.
- Taxon
- Sorghum bicolorSorghum bicolore1
- Treatment
- Post-emergence applications of the wettable formulation of sorgoleone [4.6 WP]e0
- Interactor
- weedse0weed
- Outcome
- growth of weedse0
- Direction
- inhibitede0
- Value
- 20-25%e0
- Comparator
- pre-emergence applicationse0
- Setting
- greenhouse conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Post-emergence applications of the wettable formulation of sorgoleone [4.6 WP] inhibited 20-25% higher growth of weeds than pre-emergence applications under greenhouse conditions.”
e1“Sorghum bicolor”
Claim · model-written summary
Sorgoleone suppressed growth in more than 90% of broadleaf weeds.
- Taxon
- Sorghum bicolorSorghum bicolore1
- Treatment
- sorgoleonee1
- Interactor
- broadleaf weedse0weed
- Outcome
- growthe0
- Direction
- suppressede0
- Value
- more than 90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In all studies, growth was suppressed in more than 90% of the broadleaf weeds”
e1“sorgoleone, a major component of the hydrophobic root exudates of Sorghum bicolor”
Claim · model-written summary
Rumex japonicus was completely suppressed at 0.4 kg a.i. ha(-1) sorgoleone.
- Taxon
- Sorghum bicolorSorghum bicolore1
- Treatment
- 0.4 kg a.i. ha(-1) sorgoleonee0
- Interactor
- Rumex japonicus
Rumex japonicuse0weed - Outcome
- Rumex japonicuse0
- Direction
- completely suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rumex japonicus and Plantago asiatica, were completely suppressed at 0.4 kg a.i. ha(-1) sorgoleone.”
e1“Sorghum bicolor”
Claim · model-written summary
Plantago asiatica was completely suppressed at 0.4 kg a.i. ha(-1) sorgoleone.
- Taxon
- Sorghum bicolorSorghum bicolore1
- Treatment
- 0.4 kg a.i. ha(-1) sorgoleonee0
- Interactor
- Plantago asiatica
Plantago asiaticae0weed - Outcome
- Plantago asiaticae0
- Direction
- completely suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rumex japonicus and Plantago asiatica, were completely suppressed at 0.4 kg a.i. ha(-1) sorgoleone.”
e1“Sorghum bicolor”
Claim · model-written summary
Crop species had at most 30% growth inhibition at the highest sorgoleone rate.
- Taxon
- crop speciese0
- Treatment
- 0.4 kg a.i. ha(-1) sorgoleonee0
- Outcome
- inhibitione0
- Direction
- inhibitione0
- Value
- 30%e0
Not reportedComparator
Verbatim
e0“The crop species, on the other hand, were much more tolerant to sorgoleone, with 30% inhibition, at most, at the highest rate of 0.4 kg a.i. ha(-1) sorgoleone.”
The same questions in other papers
sorgoleone · growth · Sorghum bicolor (sorghum)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
herbicide · weed · Sorghum bicolor (sorghum)Results agree
24 papers in the same direction as this paper
- positive
- positive
- positive
21 papers more in this group
See all 25 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.