Abstract
Aqueous extract of Tagetes erecta was used to test its potential to suppress root-knot nematode Meloidogyne incognita,T.erecta stem was evaluated for its effect on the growth of cucumber(Cucumis sativus) inoculated with M.incognita.Longer incubation time as well as higher concentration of T.erecta aqueous extract resulted in higher M.incognita mortality.Twelve hours after incubation,M.incognita mortality rates were 89.4%,69.5% and 44.2%,for extract concentrations of 1.5%,1.0% and 0.5% respectively,and mortality rate was 0 in control.Mortality rates were 100% under all concentrations 24 hours after incubation,mortality rate remained at 0 in control.T.erecta stem at addition rate of 0.5%,1.0%,2.0% were mixed with thermally treated soil 10 days before cucumber sowing.Cucumbers showed varied degrees of reduction in root knot number under different stem addition rates.Significant reduction in root knot numbers was observed at addition rate of 0.5% and 2.0%;whereas both root growth and root-shoot ratio increased at 0.5% and 1.0% addition rates,but no negative changes in plant height,shoot diameter,shoot fresh weight,total fresh or dry weight were found.At addition rate of 2.0%,growth of cucumber plant was suppressed,resulting in marked decreases in plant height,shoot diameter,shoot fresh weight,total fresh and dry weight.Both chlorophyll content and net photosynthesis rate in cucumber leaves decreased at 0.5%,1.0% and 2.0% addition rates.These data indicated that T.erecta stem could be used to control M.incognita growth on cucumber plant at suitable addition rates,but negative effect of T.erecta stem on photosynthetic pigments and net photosynthesis rate of cucumber plant should be taken into consideration.
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Claims 12
Claim · model-written summary
Longer incubation raised M.incognita mortality.
- Taxon
- cucumber
Cucumis sativuse1 - Treatment
- Longer incubation timee0
- Interactor
- M.incognita
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogyne incognitae0pest - Outcome
- M.incognita mortalitye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
e0“Longer incubation time as well as higher concentration of T.erecta aqueous extract resulted in higher M.incognita mortality”
e1“cucumber(Cucumis sativus)”
Claim · model-written summary
Higher T.erecta extract concentration raised M.incognita mortality.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- higher concentration of T.erecta aqueous extracte0
- Interactor
- M.incognitaMeloidogyne incognitae0pest
- Outcome
- M.incognita mortalitye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher concentration of T.erecta aqueous extract resulted in higher M.incognita mortality”
e1“cucumber(Cucumis sativus)”
Claim · model-written summary
At 12 hours, 1.5% extract yielded 89.4% nematode mortality.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- 1.5%e0
- Interactor
- M.incognitaMeloidogyne incognitae0pest
- Outcome
- M.incognita mortality ratese0
- Value
- 89.4%e0
- Qualifier
- Twelve hours after incubatione0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Twelve hours after incubation,M.incognita mortality rates were 89.4%,69.5% and 44.2%,for extract concentrations of 1.5%,1.0% and 0.5% respectively,and mortality rate was 0 in control”
e1“cucumber(Cucumis sativus)”
Claim · model-written summary
At 12 hours, 1.0% extract yielded 69.5% nematode mortality.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- 1.0%e0
- Interactor
- M.incognitaMeloidogyne incognitae0pest
- Outcome
- M.incognita mortality ratese0
- Value
- 69.5%e0
- Qualifier
- Twelve hours after incubatione0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Twelve hours after incubation,M.incognita mortality rates were 89.4%,69.5% and 44.2%,for extract concentrations of 1.5%,1.0% and 0.5% respectively,and mortality rate was 0 in control”
e1“cucumber(Cucumis sativus)”
Claim · model-written summary
At 12 hours, 0.5% extract yielded 44.2% nematode mortality.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- 0.5%e0
- Interactor
- M.incognitaMeloidogyne incognitae0pest
- Outcome
- M.incognita mortality ratese0
- Value
- 44.2%e0
- Qualifier
- Twelve hours after incubatione0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Twelve hours after incubation,M.incognita mortality rates were 89.4%,69.5% and 44.2%,for extract concentrations of 1.5%,1.0% and 0.5% respectively,and mortality rate was 0 in control”
e1“cucumber(Cucumis sativus)”
Claim · model-written summary
After 24 hours, every extract concentration gave 100% nematode mortality versus zero in controls.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- all concentrationse0
- Outcome
- Mortality ratese0
- Value
- 100%e0
- Qualifier
- 24 hours after incubatione0
- Comparator
- controle0
Not reportedInteractorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mortality rates were 100% under all concentrations 24 hours after incubation,mortality rate remained at 0 in control”
e1“cucumber(Cucumis sativus)”
Claim · model-written summary
Stem additions reduced cucumber root knot counts, significantly at 0.5% and 2.0%.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- addition rate of 0.5% and 2.0%e0
- Outcome
- root knot numberse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant reduction in root knot numbers was observed at addition rate of 0.5% and 2.0%”
e1“cucumber(Cucumis sativus)”
Claim · model-written summary
At 0.5% and 1.0%, stem additions increased root growth and root-shoot ratio.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- 0.5% and 1.0% addition ratese0
- Outcome
- root growth and root-shoot ratioe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both root growth and root-shoot ratio increased at 0.5% and 1.0% addition rates”
e1“cucumber(Cucumis sativus)”
Claim · model-written summary
The 0.5% and 1.0% rates caused no negative change in height, shoot diameter or biomass.
- Taxon
- cucumberCucumis sativuse1
- Outcome
- plant height,shoot diameter,shoot fresh weighte0
- Direction
- no negative changese0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no negative changes in plant height,shoot diameter,shoot fresh weight,total fresh or dry weight were found”
e1“cucumber(Cucumis sativus)”
Claim · model-written summary
A 2.0% stem addition suppressed cucumber growth and decreased height, shoot diameter and biomass.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- addition rate of 2.0%e0
- Outcome
- plant height,shoot diameter,shoot fresh weighte0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At addition rate of 2.0%,growth of cucumber plant was suppressed,resulting in marked decreases in plant height,shoot diameter,shoot fresh weight,total fresh and dry weight”
Claim · model-written summary
Each stem addition rate decreased cucumber leaf chlorophyll content and net photosynthesis.
- Taxon
- cucumberCucumis sativuse0
- Organ / stage
- leavese0
- Treatment
- 0.5%,1.0% and 2.0% addition ratese0
- Outcome
- chlorophyll content and net photosynthesis ratee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both chlorophyll content and net photosynthesis rate in cucumber leaves decreased at 0.5%,1.0% and 2.0% addition rates”
Claim · model-written summary
The authors advise suitable T.erecta stem rates for nematode control while accounting for photosynthetic harm.
- Taxon
- cucumberCucumis sativuse0
- Interactor
- M.incognitaMeloidogyne incognitae0pest
- Outcome
- used to control M.incognita growth on cucumber plant at suitable addition ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T.erecta stem could be used to control M.incognita growth on cucumber plant at suitable addition rates,but negative effect of T.erecta stem on photosynthetic pigments and net photosynthesis rate of cucumber plant should be taken into consideration”
The same questions in other papers
Tagetes erecta · Meloidogyne incognita · Cucumis sativus (cucumber)Results agree
1 paper in the same direction as this paper
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- positive
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See all 14 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.