Paper · 2020 · Journal of Pharmacognosy and Phytochemistry

Efficacy of bio-agents, botanical extracts and essential oils against southern leaf blight of maize (Zea mays L.)

Thorlapati Vijaya Vardhan; Sobita Simon; Sunil Zacharia

14
claims
51
verbatim quotes
0
citations
2
research areas
✓
Open access

Abstract

An experiment was conducted to evaluate the effect of plant extracts, bio agents, essential oils and fungicide in vitro and In vivo against Helminthosporium maydis causing Southern leaf blight of maize. Mancozeb @ 0.2% was effective in the inhibition of mycelial growth (100%) of Helminthosporium maydis. Among the essential oils, Lemongrass oil @ 0.2 %was found effective in the inhibition of mycelial growth (100%) followed by neem oil @ 0.1% (57.58%). Among the bio-agents, Trichoderma viride was found effective in the inhibition of mycelial growth (78.89%). Among the plant extracts, lantana camara leaf extract @ 15% was found effective in the inhibition of mycelial growth (70.97%) followed by onion bulb extract @ 10% (57.58%) and neem leaf extract @ 10% (48.13%). The plant extracts, potential bio-agent and fungicide found effective in vitro were tested and the effect of selected treatment on southern leaf blight disease intensity under field conditions was assessed during Rabi season 2018-2019. Among all the treatments, the maximum yield of maize was recorded in Mancozeb @ 0.2% (41.66q/ha) followed by Trichoderma viride (39.16 q/ha), Lemon grass oil @0.2% (37.98 q/ha), T5- Neem oil @ 0.1% (34.33 q/ha), Lantana camara @15% (32.42 q/ha), Neem leaf extract @10%(30.83 q/ha), and Onion bulb @ 10 % (30.50 q/ha) as compared to the untreated control(25.00 q/ha).

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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 14

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Mancozeb at 0.2% inhibited mycelial growth of Helminthosporium maydis by 100% in vitro.

Taxon
maizeZea mayse0
Treatment
Mancozeb @ 0.2%e1
Interactor
Helminthosporium maydisBipolaris maydise0pathogen
Outcome
mycelial growthe1
Direction
inhibitione1
Value
100%e1
Setting
in vitroe0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗
Bipolaris maydis
Bipolaris maydis · InteractorDavid B. Langston · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“An experiment was conducted to evaluate the effect of plant extracts, bio agents, essential oils and fungicide in vitro and In vivo against Helminthosporium maydis causing Southern leaf blight of maize”

✓ located verbatim in the source · abstract, characters 0–201 · show in text ↑
e1

“Mancozeb @ 0.2% was effective in the inhibition of mycelial growth (100%) of Helminthosporium maydis”

✓ located verbatim in the source · abstract, characters 203–303 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Lemongrass oil at 0.2% inhibited mycelial growth of Helminthosporium maydis by 100% in vitro.

Taxon
maizeZea mayse0
Treatment
Lemongrass oil @ 0.2 %e2
Interactor
Helminthosporium maydisBipolaris maydise0pathogen
Outcome
mycelial growthe2
Direction
inhibitione2
Value
100%e2
Setting
in vitroe0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗
Bipolaris maydis
Bipolaris maydis · InteractorDavid B. Langston · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“An experiment was conducted to evaluate the effect of plant extracts, bio agents, essential oils and fungicide in vitro and In vivo against Helminthosporium maydis causing Southern leaf blight of maize”

✓ located verbatim in the source · abstract, characters 0–201 · show in text ↑
e2

“Lemongrass oil @ 0.2 %was found effective in the inhibition of mycelial growth (100%)”

✓ located verbatim in the source · abstract, characters 331–416 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Neem oil at 0.1% inhibited mycelial growth of Helminthosporium maydis by 57.58% in vitro.

Taxon
maizeZea mayse0
Treatment
neem oil @ 0.1%e3
Interactor
Helminthosporium maydisBipolaris maydise0pathogen
Outcome
mycelial growthe2
Direction
inhibitione2
Value
57.58%e3
Setting
in vitroe0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗
Bipolaris maydis
Bipolaris maydis · InteractorDavid B. Langston · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“An experiment was conducted to evaluate the effect of plant extracts, bio agents, essential oils and fungicide in vitro and In vivo against Helminthosporium maydis causing Southern leaf blight of maize”

✓ located verbatim in the source · abstract, characters 0–201 · show in text ↑
e2

“Lemongrass oil @ 0.2 %was found effective in the inhibition of mycelial growth (100%)”

✓ located verbatim in the source · abstract, characters 331–416 · show in text ↑
e3

“followed by neem oil @ 0.1% (57.58%)”

✓ located verbatim in the source · abstract, characters 417–453 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Trichoderma viride inhibited mycelial growth of Helminthosporium maydis by 78.89% in vitro.

Taxon
maizeZea mayse0
Treatment
Trichoderma viridee4
Interactor
Helminthosporium maydisBipolaris maydise0pathogen
Second interactor
Trichoderma virideTrichoderma viridee4biocontrol_agent
Outcome
mycelial growthe4
Direction
inhibitione4
Value
78.89%e4
Setting
in vitroe0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗
Bipolaris maydis
Bipolaris maydis · InteractorDavid B. Langston · CC BY 3.0 us · Wikimedia Commons ↗
Trichoderma viride
Trichoderma viride · Second interactorKatja Schulz · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“An experiment was conducted to evaluate the effect of plant extracts, bio agents, essential oils and fungicide in vitro and In vivo against Helminthosporium maydis causing Southern leaf blight of maize”

✓ located verbatim in the source · abstract, characters 0–201 · show in text ↑
e4

“Trichoderma viride was found effective in the inhibition of mycelial growth (78.89%)”

✓ located verbatim in the source · abstract, characters 477–561 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Lantana camara leaf extract at 15% inhibited mycelial growth of Helminthosporium maydis by 70.97% in vitro.

Taxon
maizeZea mayse0
Treatment
lantana camara leaf extract @ 15%e5
Interactor
Helminthosporium maydisBipolaris maydise0pathogen
Outcome
mycelial growthe5
Direction
inhibitione5
Value
70.97%e5
Setting
in vitroe0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗
Bipolaris maydis
Bipolaris maydis · InteractorDavid B. Langston · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“An experiment was conducted to evaluate the effect of plant extracts, bio agents, essential oils and fungicide in vitro and In vivo against Helminthosporium maydis causing Southern leaf blight of maize”

✓ located verbatim in the source · abstract, characters 0–201 · show in text ↑
e5

“lantana camara leaf extract @ 15% was found effective in the inhibition of mycelial growth (70.97%)”

✓ located verbatim in the source · abstract, characters 589–688 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Onion bulb extract at 10% inhibited mycelial growth of Helminthosporium maydis by 57.58% in vitro.

Taxon
maizeZea mayse0
Treatment
onion bulb extract @ 10%e6
Interactor
Helminthosporium maydisBipolaris maydise0pathogen
Outcome
mycelial growthe5
Direction
inhibitione5
Value
57.58%e6
Setting
in vitroe0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗
Bipolaris maydis
Bipolaris maydis · InteractorDavid B. Langston · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“An experiment was conducted to evaluate the effect of plant extracts, bio agents, essential oils and fungicide in vitro and In vivo against Helminthosporium maydis causing Southern leaf blight of maize”

✓ located verbatim in the source · abstract, characters 0–201 · show in text ↑
e5

“lantana camara leaf extract @ 15% was found effective in the inhibition of mycelial growth (70.97%)”

✓ located verbatim in the source · abstract, characters 589–688 · show in text ↑
e6

“onion bulb extract @ 10% (57.58%)”

✓ located verbatim in the source · abstract, characters 701–734 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Neem leaf extract at 10% inhibited mycelial growth of Helminthosporium maydis by 48.13% in vitro.

Taxon
maizeZea mayse0
Treatment
neem leaf extract @ 10%e7
Interactor
Helminthosporium maydisBipolaris maydise0pathogen
Outcome
mycelial growthe5
Direction
inhibitione5
Value
48.13%e7
Setting
in vitroe0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗
Bipolaris maydis
Bipolaris maydis · InteractorDavid B. Langston · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“An experiment was conducted to evaluate the effect of plant extracts, bio agents, essential oils and fungicide in vitro and In vivo against Helminthosporium maydis causing Southern leaf blight of maize”

✓ located verbatim in the source · abstract, characters 0–201 · show in text ↑
e5

“lantana camara leaf extract @ 15% was found effective in the inhibition of mycelial growth (70.97%)”

✓ located verbatim in the source · abstract, characters 589–688 · show in text ↑
e7

“neem leaf extract @ 10% (48.13%)”

✓ located verbatim in the source · abstract, characters 739–771 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Mancozeb at 0.2% gave the maximum maize yield in the field, 41.66 q/ha, against an untreated control of 25.00 q/ha.

Taxon
maizeZea mayst0
Treatment
Mancozeb @ 0.2%e1
Outcome
yielde1
Direction
maximume1
Value
41.66q/hae1
Qualifier
25.00 q/hae2
Comparator
untreated controle2
Setting
field conditionse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“southern leaf blight of maize”

✓ located verbatim in the source · title, characters 70–99 · show in text ↑
e0

“under field conditions was assessed during Rabi season 2018-2019”

✓ located verbatim in the source · abstract, characters 943–1007 · show in text ↑
e1

“the maximum yield of maize was recorded in Mancozeb @ 0.2% (41.66q/ha)”

✓ located verbatim in the source · abstract, characters 1035–1105 · show in text ↑
e2

“as compared to the untreated control(25.00 q/ha)”

✓ located verbatim in the source · abstract, characters 1326–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Trichoderma viride gave a higher maize yield in the field, 39.16 q/ha, than the untreated control of 25.00 q/ha.

Taxon
maizeZea mayst0
Treatment
Trichoderma viridee3
Interactor
Trichoderma virideTrichoderma viridee3biocontrol_agent
Outcome
yielde1
Direction
higherinferrede3
Value
39.16 q/hae3
Qualifier
25.00 q/hae2
Comparator
untreated controle2
Setting
field conditionse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗
Trichoderma viride
Trichoderma viride · InteractorKatja Schulz · CC BY 4.0 · iNaturalist ↗

Verbatim

t0

“southern leaf blight of maize”

✓ located verbatim in the source · title, characters 70–99 · show in text ↑
e0

“under field conditions was assessed during Rabi season 2018-2019”

✓ located verbatim in the source · abstract, characters 943–1007 · show in text ↑
e1

“the maximum yield of maize was recorded in Mancozeb @ 0.2% (41.66q/ha)”

✓ located verbatim in the source · abstract, characters 1035–1105 · show in text ↑
e2

“as compared to the untreated control(25.00 q/ha)”

✓ located verbatim in the source · abstract, characters 1326–1374 · show in text ↑
e3

“followed by Trichoderma viride (39.16 q/ha)”

✓ located verbatim in the source · abstract, characters 1106–1149 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Lemongrass oil at 0.2% gave a higher maize yield in the field, 37.98 q/ha, than the untreated control of 25.00 q/ha.

Taxon
maizeZea mayst0
Treatment
Lemon grass oil @0.2%e3
Outcome
yielde1
Direction
higherinferrede3
Value
37.98 q/hae3
Qualifier
25.00 q/hae2
Comparator
untreated controle2
Setting
field conditionse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“southern leaf blight of maize”

✓ located verbatim in the source · title, characters 70–99 · show in text ↑
e0

“under field conditions was assessed during Rabi season 2018-2019”

✓ located verbatim in the source · abstract, characters 943–1007 · show in text ↑
e1

“the maximum yield of maize was recorded in Mancozeb @ 0.2% (41.66q/ha)”

✓ located verbatim in the source · abstract, characters 1035–1105 · show in text ↑
e2

“as compared to the untreated control(25.00 q/ha)”

✓ located verbatim in the source · abstract, characters 1326–1374 · show in text ↑
e3

“Lemon grass oil @0.2% (37.98 q/ha)”

✓ located verbatim in the source · abstract, characters 1151–1185 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Neem oil at 0.1% gave a higher maize yield in the field, 34.33 q/ha, than the untreated control of 25.00 q/ha.

Taxon
maizeZea mayst0
Treatment
Neem oil @ 0.1%e3
Outcome
yielde1
Direction
higherinferrede3
Value
34.33 q/hae3
Qualifier
25.00 q/hae2
Comparator
untreated controle2
Setting
field conditionse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“southern leaf blight of maize”

✓ located verbatim in the source · title, characters 70–99 · show in text ↑
e0

“under field conditions was assessed during Rabi season 2018-2019”

✓ located verbatim in the source · abstract, characters 943–1007 · show in text ↑
e1

“the maximum yield of maize was recorded in Mancozeb @ 0.2% (41.66q/ha)”

✓ located verbatim in the source · abstract, characters 1035–1105 · show in text ↑
e2

“as compared to the untreated control(25.00 q/ha)”

✓ located verbatim in the source · abstract, characters 1326–1374 · show in text ↑
e3

“T5- Neem oil @ 0.1% (34.33 q/ha)”

✓ located verbatim in the source · abstract, characters 1187–1219 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Lantana camara at 15% gave a higher maize yield in the field, 32.42 q/ha, than the untreated control of 25.00 q/ha.

Taxon
maizeZea mayst0
Treatment
Lantana camara @15%e3
Outcome
yielde1
Direction
higherinferrede3
Value
32.42 q/hae3
Qualifier
25.00 q/hae2
Comparator
untreated controle2
Setting
field conditionse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“southern leaf blight of maize”

✓ located verbatim in the source · title, characters 70–99 · show in text ↑
e0

“under field conditions was assessed during Rabi season 2018-2019”

✓ located verbatim in the source · abstract, characters 943–1007 · show in text ↑
e1

“the maximum yield of maize was recorded in Mancozeb @ 0.2% (41.66q/ha)”

✓ located verbatim in the source · abstract, characters 1035–1105 · show in text ↑
e2

“as compared to the untreated control(25.00 q/ha)”

✓ located verbatim in the source · abstract, characters 1326–1374 · show in text ↑
e3

“Lantana camara @15% (32.42 q/ha)”

✓ located verbatim in the source · abstract, characters 1221–1253 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Neem leaf extract at 10% gave a higher maize yield in the field, 30.83 q/ha, than the untreated control of 25.00 q/ha.

Taxon
maizeZea mayst0
Treatment
Neem leaf extract @10%e3
Outcome
yielde1
Direction
higherinferrede3
Value
30.83 q/hae3
Qualifier
25.00 q/hae2
Comparator
untreated controle2
Setting
field conditionse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“southern leaf blight of maize”

✓ located verbatim in the source · title, characters 70–99 · show in text ↑
e0

“under field conditions was assessed during Rabi season 2018-2019”

✓ located verbatim in the source · abstract, characters 943–1007 · show in text ↑
e1

“the maximum yield of maize was recorded in Mancozeb @ 0.2% (41.66q/ha)”

✓ located verbatim in the source · abstract, characters 1035–1105 · show in text ↑
e2

“as compared to the untreated control(25.00 q/ha)”

✓ located verbatim in the source · abstract, characters 1326–1374 · show in text ↑
e3

“Neem leaf extract @10%(30.83 q/ha)”

✓ located verbatim in the source · abstract, characters 1255–1289 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Onion bulb extract at 10% gave a higher maize yield in the field, 30.50 q/ha, than the untreated control of 25.00 q/ha.

Taxon
maizeZea mayst0
Treatment
Onion bulb @ 10 %e3
Outcome
yielde1
Direction
higherinferrede3
Value
30.50 q/hae3
Qualifier
25.00 q/hae2
Comparator
untreated controle2
Setting
field conditionse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“southern leaf blight of maize”

✓ located verbatim in the source · title, characters 70–99 · show in text ↑
e0

“under field conditions was assessed during Rabi season 2018-2019”

✓ located verbatim in the source · abstract, characters 943–1007 · show in text ↑
e1

“the maximum yield of maize was recorded in Mancozeb @ 0.2% (41.66q/ha)”

✓ located verbatim in the source · abstract, characters 1035–1105 · show in text ↑
e2

“as compared to the untreated control(25.00 q/ha)”

✓ located verbatim in the source · abstract, characters 1326–1374 · show in text ↑
e3

“Onion bulb @ 10 % (30.50 q/ha)”

✓ located verbatim in the source · abstract, characters 1295–1325 · show in text ↑

Allium cepa · Bipolaris maydis · Zea mays (maize)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. negative
See all 2 papers →

Lantana camara · yield · Zea mays (maize)Positive and negative results

5 papers: 3 positive, 2 negative or no effect

2 papers in the same direction as this paper · 2 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. positive

1 paper more in this group

See all 5 papers →

Cymbopogon citratus · yield · Zea mays (maize)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

mancozeb · Bipolaris maydis · Zea mays (maize)Results agree

4 papers: 4 positive, 0 negative or no effect

3 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive
See all 4 papers →

Azadirachta indica · Bipolaris maydis · Zea mays (maize)Results agree

4 papers: 4 positive, 0 negative or no effect

3 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive
See all 4 papers →

Trichoderma viride · Bipolaris maydis · Zea mays (maize)Results agree

4 papers: 4 positive, 0 negative or no effect

3 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive
See all 4 papers →

Allium cepa · yield · Zea mays (maize)Results agree

5 papers: 5 positive, 0 negative or no effect

4 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

Trichoderma viride · yield · Zea mays (maize)Results agree

8 papers: 8 positive, 0 negative or no effect

7 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

4 papers more in this group

See all 8 papers →

8 of 12 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.