Abstract
The work was undertaken to investigate the phytotoxic potential of essential oil from Melaleuca leucadendra against three weed species, viz., Echinochloa crus-galli, Cyperus rotundus and Leptochloa chinensis. It was observed that volatile oil (0.25-1.5 mg ml-1) of Melaleuca retarded the germination and growth of all the test weeds in a dose-response bioassay conducted under laboratory conditions. Generally, both root and shoot length showed an inhibitory effect in a concentration dependent manner and the maximum effect was observed in C. rotundus, followed by E. crus-galli and L. chinensis. The Melaleuca oil not only affected the germination and seedling growth of the test weeds, but also inhibited the chlorophyll content and dry weight. At the highest dose of Melaleuca oil treatment (1.5 mg ml-1), the chlorophyll content declined by nearly 50% in E. crus-galli and 90% in L. chinensis over the control. Thus, it is concluded that volatile oil possesses phytotoxic potential towards other plants and could be further explored for weed management.
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Claims 6
Claim · model-written summary
Melaleuca volatile oil retarded the germination and growth of all test weeds.
- Taxon
- test weedse0
- Treatment
- volatile oil (0.25-1.5 mg ml-1) of Melaleucae0
- Outcome
- germination and growthe0
- Direction
- retardede0
MelaleucaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“volatile oil (0.25-1.5 mg ml-1) of Melaleuca retarded the germination and growth of all the test weeds in a dose-response bioassay”
Claim · model-written summary
Melaleuca volatile oil had an inhibitory effect on root and shoot length of the test weeds in a concentration-dependent manner.
- Taxon
- test weedse0
- Treatment
- volatile oil (0.25-1.5 mg ml-1) of Melaleucae0
- Outcome
- root and shoot lengthe1
- Direction
- inhibitory effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“volatile oil (0.25-1.5 mg ml-1) of Melaleuca retarded the germination and growth of all the test weeds in a dose-response bioassay”
e1“both root and shoot length showed an inhibitory effect in a concentration dependent manner”
Claim · model-written summary
The inhibitory effect of Melaleuca oil was maximal in Cyperus rotundus.
- Taxon
- C. rotundus
Cyperus rotunduse2 - Treatment
- volatile oil (0.25-1.5 mg ml-1) of Melaleucae0
- Outcome
- inhibitory effecte1
- Direction
- maximume2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“volatile oil (0.25-1.5 mg ml-1) of Melaleuca retarded the germination and growth of all the test weeds in a dose-response bioassay”
e1“both root and shoot length showed an inhibitory effect in a concentration dependent manner”
e2“the maximum effect was observed in C. rotundus”
Claim · model-written summary
Melaleuca oil inhibited chlorophyll content and dry weight of the test weeds.
- Taxon
- test weedse3
- Treatment
- Melaleuca oile3
- Outcome
- chlorophyll content and dry weighte3
- Direction
- inhibitede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The Melaleuca oil not only affected the germination and seedling growth of the test weeds, but also inhibited the chlorophyll content and dry weight”
Claim · model-written summary
At the highest dose, Melaleuca oil reduced chlorophyll content of Echinochloa crus-galli by nearly 50% relative to the control.
- Taxon
- E. crus-galli
Echinochloa crus-gallie4 - Treatment
- highest dose of Melaleuca oile4
- Outcome
- chlorophyll contente4
- Direction
- declinede4
- Value
- nearly 50%e4
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“At the highest dose of Melaleuca oil treatment (1.5 mg ml-1), the chlorophyll content declined by nearly 50% in E. crus-galli and 90% in L. chinensis over the control”
Claim · model-written summary
At the highest dose, Melaleuca oil reduced chlorophyll content of Leptochloa chinensis by 90% relative to the control.
- Taxon
- L. chinensis
Dinebra chinensise4 - Treatment
- highest dose of Melaleuca oile4
- Outcome
- chlorophyll contente4
- Direction
- declinede4
- Value
- 90%e4
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“At the highest dose of Melaleuca oil treatment (1.5 mg ml-1), the chlorophyll content declined by nearly 50% in E. crus-galli and 90% in L. chinensis over the control”