Abstract
The present study was undertaken to assess the effect of herbicides imazethapyr, paraquat and pendimethalin on in vitro growth of Rhizobium in terms of optical density and on symbiotic and growth parameters under field conditions. Pendimethalin at 1980 and 396 ppm did not affect the growth of Rhizobium and was at par with that observed in control medium, however, imazethapyr significantly inhibited Rhizobium growth at both concentrations. Paraquat at 255 ppm showed marginal increase in Rhizobium growth, however, at 1272 ppm it totally inhibited the growth. Under field conditions, nodulation efficiency viz., number and dry weight of nodules was not affected in case of pendimethalin @ 0.45 kg/ha or 0.75 kg/ha and was at par with two hand weeding treatments. This is in corroboration with the response recorded under in vitro conditions. The treatment of combination of herbicides too did not largely affect symbiotic parameters. Herbicide treatments comprising of pendimethalin followed by paraquat 6 or 8 weeks after sowing (WAS) offered grain yield at par to that obtained by two hand weedings treatment
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Claims 8
Claim · model-written summary
Pendimethalin at 1980 and 396 ppm did not affect Rhizobium growth versus control medium.
- Taxon
- pigeonpea
Cajanus cajant0 - Treatment
- Pendimethalin at 1980 and 396 ppme0
- Outcome
- growth of Rhizobiume0
- Direction
- did not affecte0
- Comparator
- control mediume0
RhizobiumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pigeonpea”
e0“Pendimethalin at 1980 and 396 ppm did not affect the growth of Rhizobium and was at par with that observed in control medium”
Claim · model-written summary
Imazethapyr significantly inhibited Rhizobium growth at both concentrations.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- imazethapyre0
- Outcome
- Rhizobium growthe0
- Direction
- inhibitede0
- Qualifier
- both concentrationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pigeonpea”
e0“imazethapyr significantly inhibited Rhizobium growth at both concentrations”
Claim · model-written summary
Paraquat at 255 ppm marginally increased Rhizobium growth.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- Paraquat at 255 ppme0
- Outcome
- Rhizobium growthe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pigeonpea”
e0“Paraquat at 255 ppm showed marginal increase in Rhizobium growth”
Claim · model-written summary
Paraquat at 1272 ppm totally inhibited Rhizobium growth.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- Paraquat at 255 ppme1
- Outcome
- growthe0
- Direction
- inhibitede0
- Qualifier
- at 1272 ppme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pigeonpea”
e0“at 1272 ppm it totally inhibited the growth”
e1“Paraquat at 255 ppm showed marginal increase in Rhizobium growth, however, at 1272 ppm it totally inhibited the growth”
Claim · model-written summary
Pendimethalin at 0.45 kg/ha left nodule number and dry weight at par with two hand weedings.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- pendimethalin @ 0.45 kg/hae0
- Outcome
- number and dry weight of nodulese0
- Direction
- not affectede0
- Comparator
- two hand weeding treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pigeonpea”
e0“number and dry weight of nodules was not affected in case of pendimethalin @ 0.45 kg/ha or 0.75 kg/ha and was at par with two hand weeding treatments”
e1“growth of Rhizobium in terms of optical density”
Claim · model-written summary
Pendimethalin at 0.75 kg/ha left nodule number and dry weight at par with two hand weedings.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- 0.75 kg/hae0
- Outcome
- number and dry weight of nodulese0
- Direction
- not affectede0
- Comparator
- two hand weeding treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pigeonpea”
e0“number and dry weight of nodules was not affected in case of pendimethalin @ 0.45 kg/ha or 0.75 kg/ha and was at par with two hand weeding treatments”
e1“growth of Rhizobium in terms of optical density”
Claim · model-written summary
Combined herbicide treatments did not largely affect symbiotic parameters.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- combination of herbicidese0
- Outcome
- symbiotic parameterse0
- Direction
- did not largely affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pigeonpea”
e0“The treatment of combination of herbicides too did not largely affect symbiotic parameters”
e1“growth of Rhizobium in terms of optical density”
Claim · model-written summary
Pendimethalin followed by paraquat at 6 weeks after sowing gave grain yield at par with two hand weedings.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- pendimethalin followed by paraquat 6 or 8 weeks after sowing (WAS)e0
- Outcome
- grain yielde0
- Direction
- at pare0
- Comparator
- two hand weedings treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pigeonpea”
e0“pendimethalin followed by paraquat 6 or 8 weeks after sowing (WAS) offered grain yield at par to that obtained by two hand weedings treatment”
The same questions in other papers
paraquat · yield · Cajanus cajan (pigeon pea)Positive and negative results
2 reporting no difference from an alternative
- positive
- positive
pendimethalin · yield · Cajanus cajan (pigeon pea)Positive and negative results
2 papers in the same direction as this paper · 18 reporting no difference from an alternative
- positive
- positive
- positive
17 papers more in this group
See all 21 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.