Abstract
With the aim of estimating the persistence of imazaquin and imazethapyr soil biological activity in a dark red latosol in Maringá, PR, Brazil, experiments were carried out in two different seasons of the year (winter/spring - from July to October, 1999, and spring/summer - from December 1999, to March, 2000). The herbicides were applied at 150 and 600 g/ha, and soil samples from 0-2 cm depth were collected from herbicide-treated plots an no-herbicide check up to 91 days after application (DAA). In greenhouse, bioassays using cucumber and sorghum as test-species were carried out, sowing these two species in soil samples collected from the experimental field. Results obtained allowed to conclude that imazaquin displayed a longer soil residual effect, and that higher rates (600 g/ha) of both herbicides provided longer periods of persistence, despite the season of application. The inhibition percentage of biomass production in samples from spring/summer herbicide-treated soil decreased faster, when compared with winter/spring application. Cucumber was more sensitive than sorghum as bioindicator of imazaquin and imazethapyr soil biological activity
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Claims 6
Claim · model-written summary
Imazaquin showed a longer residual effect than imazethapyr.
- Taxon
- cucumber and sorghum
Cucumis sativus
Sorghume0 - Treatment
- imazaquine1
- Outcome
- soil residual effecte1
- Direction
- longere1
- Comparator
- imazethapyrt0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bioassays using cucumber and sorghum as test-species”
e1“imazaquin displayed a longer soil residual effect”
t0“imazaquin and imazethapyr”
Claim · model-written summary
The 600 g/ha imazaquin rate gave longer persistence.
- Taxon
- cucumber and sorghumCucumis sativusSorghume0
- Treatment
- 600 g/hae1
- Outcome
- periods of persistencee1
- Direction
- longere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bioassays using cucumber and sorghum as test-species”
e1“higher rates (600 g/ha) of both herbicides provided longer periods of persistence”
t0“imazaquin”
Claim · model-written summary
The 600 g/ha imazethapyr rate gave longer persistence.
- Taxon
- cucumber and sorghumCucumis sativusSorghume0
- Treatment
- 600 g/hae1
- Outcome
- periods of persistencee1
- Direction
- longere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bioassays using cucumber and sorghum as test-species”
e1“higher rates (600 g/ha) of both herbicides provided longer periods of persistence”
t0“imazethapyr”
Claim · model-written summary
Biomass inhibition decreased faster after spring/summer application than after winter/spring application.
- Taxon
- cucumber and sorghumCucumis sativusSorghume0
- Treatment
- spring/summer herbicide-treated soile1
- Outcome
- inhibition percentage of biomass productione1
- Direction
- decreased fastere1
- Comparator
- winter/spring applicatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bioassays using cucumber and sorghum as test-species”
e1“The inhibition percentage of biomass production in samples from spring/summer herbicide-treated soil decreased faster, when compared with winter/spring application.”
Claim · model-written summary
Cucumber was more sensitive than sorghum as a bioindicator of imazaquin activity.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- imazaquine0
- Outcome
- sensitivee0
- Direction
- more sensitivee0
- Comparator
- sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber was more sensitive than sorghum as bioindicator of imazaquin and imazethapyr soil biological activity”
Claim · model-written summary
Cucumber was more sensitive than sorghum as a bioindicator of imazethapyr activity.
- Taxon
- CucumberCucumis sativuse0
- Treatment
- imazethapyre0
- Outcome
- sensitivee0
- Direction
- more sensitivee0
- Comparator
- sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cucumber was more sensitive than sorghum as bioindicator of imazaquin and imazethapyr soil biological activity”
The same questions in other papers
herbicide · disease · SorghumPositive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
2 papers more in this group
See all 6 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.