Abstract
Abstract Allelochemical based herbicides are environmentally friendly management alternatives. Thus, cosmos ( Cosmos sulphureus Cav.) flower extract as a bioherbicide was investigated in soybean productions. This study aimed to determine effective spraying volume of C. sulphureus flower extract to manage weeds based on weed dominances and soybean yield. This research was conducted at Banguntapan Village, Bantul District, Special Region of Yogyakarta Province, Indonesia on August to November 2018. This study was set as a single factor Randomized Complete Block Design (RCBD) with three replications set as blocks. Three spraying volumes; 1000, 2000, 3000 L.ha −1 and two weed management practices were used as control. Continued weed free and weeded treatments were used to determine soybean yield lost. Data were analyzed using Analysis of Variance (ANOVA), continued with Least Significant Differences (LSD) at the 0.05 probability level. Results showed weed species in soybean fields was dominated by purple nutsedge ( Cyperus rotundus L.). The 400 g.L −1 extract concentration applied at 3000 L.ha-1 resulted in similar weed control and soybean yield compared to pre-emergence herbicide application and manual weeding at 1 and 3 weeks after planting (WAP). These findings showed that extract of cosmos flowers possess bioherbicidal activity against weed without having detrimental effects on the soybean plants.
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Claims 4
Claim · model-written summary
Weed species in soybean fields were dominated by purple nutsedge.
- Taxon
- soybean
Glycine maxe0 - Interactor
- Cyperus rotundus
Cyperus rotunduse0weed - Outcome
- weed species in soybean fieldse0
- Qualifier
- dominated by purple nutsedgee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results showed weed species in soybean fields was dominated by purple nutsedge ( Cyperus rotundus L.)”
Claim · model-written summary
The 400 g/L extract applied at 3000 L/ha gave weed control and soybean yield similar to pre-emergence herbicide and manual weeding.
- Taxon
- soybeanGlycine maxe1
- Treatment
- 400 g.L −1 extract concentration applied at 3000 L.ha-1e1
- Outcome
- weed control and soybean yielde1
- Direction
- similare1
- Comparator
- pre-emergence herbicide application and manual weedinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The 400 g.L −1 extract concentration applied at 3000 L.ha-1 resulted in similar weed control and soybean yield compared to pre-emergence herbicide application and manual weeding at 1 and 3 weeks after planting (WAP)”
Claim · model-written summary
Cosmos flower extract possesses bioherbicidal activity against weeds.
- Taxon
- soybeanGlycine maxe2
- Treatment
- extract of cosmos flowerse2
- Outcome
- bioherbicidal activity against weede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“These findings showed that extract of cosmos flowers possess bioherbicidal activity against weed without having detrimental effects on the soybean plants”
Claim · model-written summary
Cosmos flower extract had no detrimental effects on soybean plants.
- Taxon
- soybeanGlycine maxe2
- Treatment
- extract of cosmos flowerse2
- Outcome
- detrimental effects on the soybean plantse2
- Qualifier
- without havinge2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“These findings showed that extract of cosmos flowers possess bioherbicidal activity against weed without having detrimental effects on the soybean plants”
The same questions in other papers
botanical · weed · Glycine max (soybean)Results agree
3 papers in the same direction as this paper
- positive
- 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.