Paper · 2015 · Pakistan Journal of Botany

EFFECTS OF ALLELOPATHIC CHEMICALS EXTRACTED FROM VARIOUS PLANT LEAVES ON WEED CONTROL AND WHEAT CROP PRODUCTIVITY

Ejaz Ahmad Khan; Abdul Aziz Khakwani; Muhammad Munir

6
claims
12
verbatim quotes
17
citations
2
research areas
—
Not open access

Abstract

A study on allelopathic effect of leaf water extracts of Eucalyptus, Acacia, Sorghum, Shishum, Sunflower, Poplar, Tobacco and Congress grass on weeds control and growth of wheat cv. Hashim-8 was conducted at Faculty of Agriculture, Gomal University, Dera Ismail Khan during 2012-2013. The findings of this study revealed that allelopathic chemicals in leaf water extracts of these plants significantly suppressed weeds growth by reducing weed density, fresh and dry weed biomass, and encouraged wheat yield and yield components such as days to 50% heading, plant height, tillers m -2 , grain spike -1 , 1000-gain weight, biological and grain yield. Even though minimum fresh and dry weed biomass and highest wheat grain yield and yield related components were observed in twice hand weeding treatment which is economically less feasible on large scale. However, our findings showed an alternative allelopathic technique to minimize weed infestation and boost wheat growth and yield using natural plant material. On the basis of present results, it is recommended that leaf water extracts of Sorghum, Sunflower and Congress grass can be applied twice (30 and 60 DAS) during the growing season to control weeds and to enhance wheat grain yield.

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Claims 6

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Leaf extracts significantly reduced weed density.

Treatment
leaf water extracts of these plantse0
Interactor
weedse0weed
Outcome
weed densitye0
Direction
reducinge0

Not reportedComparator

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

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“allelopathic chemicals in leaf water extracts of these plants significantly suppressed weeds growth by reducing weed density, fresh and dry weed biomass”

✓ located verbatim in the source · abstract, characters 326–478 · show in text ↑
t0

“WHEAT”

✓ located verbatim in the source · title, characters 90–95 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Leaf extracts significantly reduced fresh and dry weed biomass.

Treatment
leaf water extracts of these plantse0
Interactor
weedse0weed
Outcome
fresh and dry weed biomasse0
Direction
reducinge0

Not reportedComparator

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

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“allelopathic chemicals in leaf water extracts of these plants significantly suppressed weeds growth by reducing weed density, fresh and dry weed biomass”

✓ located verbatim in the source · abstract, characters 326–478 · show in text ↑
t0

“WHEAT”

✓ located verbatim in the source · title, characters 90–95 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Leaf extracts encouraged wheat yield and yield components.

Outcome
wheat yield and yield componentse0
Direction
encouragede0

Not reportedTreatmentComparator

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

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“encouraged wheat yield and yield components such as days to 50% heading, plant height, tillers m -2 , grain spike -1 , 1000-gain weight, biological and grain yield.”

✓ located verbatim in the source · abstract, characters 484–648 · show in text ↑
t0

“WHEAT”

✓ located verbatim in the source · title, characters 90–95 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Twice hand weeding produced minimum fresh and dry weed biomass.

Treatment
twice hand weeding treatmente0
Interactor
weede0weed
Outcome
fresh and dry weed biomasse0
Direction
minimume0

Not reportedComparator

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

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“minimum fresh and dry weed biomass and highest wheat grain yield and yield related components were observed in twice hand weeding treatment”

✓ located verbatim in the source · abstract, characters 661–800 · show in text ↑
t0

“WHEAT”

✓ located verbatim in the source · title, characters 90–95 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Twice hand weeding produced the highest wheat grain yield and related components.

Treatment
twice hand weeding treatmente0
Outcome
wheat grain yield and yield related componentse0
Direction
higheste0

Not reportedComparator

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

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“minimum fresh and dry weed biomass and highest wheat grain yield and yield related components were observed in twice hand weeding treatment”

✓ located verbatim in the source · abstract, characters 661–800 · show in text ↑
t0

“WHEAT”

✓ located verbatim in the source · title, characters 90–95 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend twice applying Sorghum, Sunflower, and Congress grass leaf extracts to control weeds and increase wheat yield.

Treatment
leaf water extracts of Sorghum, Sunflower and Congress grasse0
Interactor
weedse0weed
Outcome
control weeds and to enhance wheat grain yielde0

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

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“it is recommended that leaf water extracts of Sorghum, Sunflower and Congress grass can be applied twice (30 and 60 DAS) during the growing season to control weeds and to enhance wheat grain yield.”

✓ located verbatim in the source · abstract, characters 1045–1242 · show in text ↑
t0

“WHEAT”

✓ located verbatim in the source · title, characters 90–95 · show in text ↑

botanical · weed · Triticum aestivum (wheat)Positive and negative results

42 papers: 41 positive, 1 negative or no effect

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herbicide · weed · Triticum aestivum (wheat)Positive and negative results

401 papers: 362 positive, 39 negative or no effect

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herbicide · yield · Triticum aestivum (wheat)Positive and negative results

563 papers: 466 positive, 97 negative or no effect

465 papers in the same direction as this paper · 87 in the opposite direction · 10 reporting no difference from an alternative

  1. positive
  2. negative
  3. no effect

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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.