Paper · 2017 · Journal of Phytopathology and Pest Management

In vivo evaluation of garlic (Allium sativum) extract in the control of potato late blight disease caused by phytophthora infestans

Diana U. Affiah; C. A. Amienyo

15
claims
34
verbatim quotes
0
citations
2
research areas
—
Not open access

Abstract

In vivo study was conducted to evaluate the efficacy of foliar application of garlic extract and two chemical fungicides (ridomil and z-force) in the reduction of late blight caused by Phytophthora infestans, increase of potato biomass and total tuber yield in natural field condition. The field experiment was conducted in Machambe village, Bokkos Local Government Area of Plateau State. Certified seeds were obtained from the National Root Crop Research Institute, Kuru, Plateau State, Nigeria. Potato seeds were grown in four row plots, 30-meter-long with spacing of 70cm between rows and 30cm within rows. Experiment was laid out in a Complete Randomized Block Design (CRBD) with four replications. Foliar sprays of 0.4 g/l Ridomil, Z-force and garlic extract respectively, at a 3day interval soon after first visible symptoms appeared to reduced disease incidence and resulted in higher biological and tuber yield compared to control (unsprayed plots). Ridomil and garlic extract were most effective in minimizing the disease incidence and producing better biological yields (33.95g and 31.02g) and tuber yields (15.93t/ha and 14.99t/ha) respectively. Control plot produced the least biological and tuber yield of 23.92g and 11.95t/ha respectively. There was no significant difference at P<0.05 between the tested treatments. There was significant difference in disease incidence reduction at (P<0.05) by the extract and chemical fungicides. Late blight incidence reduction effect of garlic extract was slightly higher than that of Z-force fungicide. Therefore, the evaluated plant material (garlic extract) could serve as an alternative to chemical fungicide in the control of late blight disease in potato.

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Claims 15

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Ridomil spray reduced potato late blight incidence versus unsprayed plots.

Treatment
Ridomile0
Interactor
Phytophthora infestansPhytophthora infestanse1pathogen
Outcome
disease incidencee0
Direction
reducede0
Comparator
control (unsprayed plots)e0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Phytophthora infestans
Phytophthora infestans · InteractorHoward F. Schwartz, Colorado State University, United States · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Foliar sprays of 0.4 g/l Ridomil, Z-force and garlic extract respectively, at a 3day interval soon after first visible symptoms appeared to reduced disease incidence and resulted in higher biological and tuber yield compared to control (unsprayed plots).”

✓ located verbatim in the source · abstract, characters 703–957 · show in text ↑
e1

“late blight caused by Phytophthora infestans”

✓ located verbatim in the source · abstract, characters 163–207 · show in text ↑
e2

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Z-force spray reduced potato late blight incidence versus unsprayed plots.

Treatment
Z-forcee0
Interactor
Phytophthora infestansPhytophthora infestanse1pathogen
Outcome
disease incidencee0
Direction
reducede0
Comparator
control (unsprayed plots)e0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Phytophthora infestans
Phytophthora infestans · InteractorHoward F. Schwartz, Colorado State University, United States · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Foliar sprays of 0.4 g/l Ridomil, Z-force and garlic extract respectively, at a 3day interval soon after first visible symptoms appeared to reduced disease incidence and resulted in higher biological and tuber yield compared to control (unsprayed plots).”

✓ located verbatim in the source · abstract, characters 703–957 · show in text ↑
e1

“late blight caused by Phytophthora infestans”

✓ located verbatim in the source · abstract, characters 163–207 · show in text ↑
e2

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

garlic extract spray reduced potato late blight incidence versus unsprayed plots.

Treatment
garlic extracte0
Interactor
Phytophthora infestansPhytophthora infestanse1pathogen
Outcome
disease incidencee0
Direction
reducede0
Comparator
control (unsprayed plots)e0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Phytophthora infestans
Phytophthora infestans · InteractorHoward F. Schwartz, Colorado State University, United States · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Foliar sprays of 0.4 g/l Ridomil, Z-force and garlic extract respectively, at a 3day interval soon after first visible symptoms appeared to reduced disease incidence and resulted in higher biological and tuber yield compared to control (unsprayed plots).”

✓ located verbatim in the source · abstract, characters 703–957 · show in text ↑
e1

“late blight caused by Phytophthora infestans”

✓ located verbatim in the source · abstract, characters 163–207 · show in text ↑
e2

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Ridomil spray increased potato biological and tuber yield versus unsprayed plots.

Treatment
Ridomile0
Outcome
biological and tuber yielde0
Direction
highere0
Comparator
control (unsprayed plots)e0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Foliar sprays of 0.4 g/l Ridomil, Z-force and garlic extract respectively, at a 3day interval soon after first visible symptoms appeared to reduced disease incidence and resulted in higher biological and tuber yield compared to control (unsprayed plots).”

✓ located verbatim in the source · abstract, characters 703–957 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Z-force spray increased potato biological and tuber yield versus unsprayed plots.

Treatment
Z-forcee0
Outcome
biological and tuber yielde0
Direction
highere0
Comparator
control (unsprayed plots)e0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Foliar sprays of 0.4 g/l Ridomil, Z-force and garlic extract respectively, at a 3day interval soon after first visible symptoms appeared to reduced disease incidence and resulted in higher biological and tuber yield compared to control (unsprayed plots).”

✓ located verbatim in the source · abstract, characters 703–957 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

garlic extract spray increased potato biological and tuber yield versus unsprayed plots.

Treatment
garlic extracte0
Outcome
biological and tuber yielde0
Direction
highere0
Comparator
control (unsprayed plots)e0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Foliar sprays of 0.4 g/l Ridomil, Z-force and garlic extract respectively, at a 3day interval soon after first visible symptoms appeared to reduced disease incidence and resulted in higher biological and tuber yield compared to control (unsprayed plots).”

✓ located verbatim in the source · abstract, characters 703–957 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Ridomil biological yield was 33.95g.

Treatment
Ridomile0
Outcome
biological yieldse0
Value
33.95ge0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Ridomil and garlic extract were most effective in minimizing the disease incidence and producing better biological yields (33.95g and 31.02g) and tuber yields (15.93t/ha and 14.99t/ha) respectively.”

✓ located verbatim in the source · abstract, characters 958–1156 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Garlic extract biological yield was 31.02g.

Treatment
garlic extracte0
Outcome
biological yieldse0
Value
31.02ge0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Ridomil and garlic extract were most effective in minimizing the disease incidence and producing better biological yields (33.95g and 31.02g) and tuber yields (15.93t/ha and 14.99t/ha) respectively.”

✓ located verbatim in the source · abstract, characters 958–1156 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Ridomil tuber yield was 15.93t/ha.

Treatment
Ridomile0
Outcome
tuber yieldse0
Value
15.93t/hae0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Ridomil and garlic extract were most effective in minimizing the disease incidence and producing better biological yields (33.95g and 31.02g) and tuber yields (15.93t/ha and 14.99t/ha) respectively.”

✓ located verbatim in the source · abstract, characters 958–1156 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Garlic extract tuber yield was 14.99t/ha.

Treatment
garlic extracte0
Outcome
tuber yieldse0
Value
14.99t/hae0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Ridomil and garlic extract were most effective in minimizing the disease incidence and producing better biological yields (33.95g and 31.02g) and tuber yields (15.93t/ha and 14.99t/ha) respectively.”

✓ located verbatim in the source · abstract, characters 958–1156 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Unsprayed control biological yield was 23.92g.

Treatment
Control plote0
Outcome
biological and tuber yielde0
Direction
leaste0
Value
23.92ge0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Control plot produced the least biological and tuber yield of 23.92g and 11.95t/ha respectively.”

✓ located verbatim in the source · abstract, characters 1157–1253 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Unsprayed control tuber yield was 11.95t/ha.

Treatment
Control plote0
Outcome
tuber yielde0
Direction
leaste0
Value
11.95t/hae0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Control plot produced the least biological and tuber yield of 23.92g and 11.95t/ha respectively.”

✓ located verbatim in the source · abstract, characters 1157–1253 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Observationobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Tested treatments had no significant difference from one another.

Outcome
no significant differencee0
Comparator
tested treatmentse0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“There was no significant difference at P<0.05 between the tested treatments.”

✓ located verbatim in the source · abstract, characters 1254–1330 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Garlic extract reduced late blight incidence slightly more than Z-force.

Treatment
garlic extracte0
Interactor
Phytophthora infestansPhytophthora infestanse2pathogen
Outcome
Late blight incidence reduction effecte0
Direction
slightly highere0
Comparator
Z-force fungicidee0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Phytophthora infestans
Phytophthora infestans · InteractorHoward F. Schwartz, Colorado State University, United States · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Late blight incidence reduction effect of garlic extract was slightly higher than that of Z-force fungicide.”

✓ located verbatim in the source · abstract, characters 1447–1555 · show in text ↑
e1

“potato biomass”

✓ located verbatim in the source · abstract, characters 221–235 · show in text ↑
e2

“late blight caused by Phytophthora infestans”

✓ located verbatim in the source · abstract, characters 163–207 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Authors suggest garlic extract as an alternative fungicide for potato late blight.

Interactor
Phytophthora infestansPhytophthora infestanse1pathogen
Outcome
alternative to chemical fungicide in the control of late blight diseasee0

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

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Phytophthora infestans
Phytophthora infestans · InteractorHoward F. Schwartz, Colorado State University, United States · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“garlic extract) could serve as an alternative to chemical fungicide in the control of late blight disease in potato.”

✓ located verbatim in the source · abstract, characters 1597–1713 · show in text ↑
e1

“Phytophthora infestans”

✓ located verbatim in the source · abstract, characters 185–207 · show in text ↑

Allium sativum · Phytophthora infestans · Solanum tuberosum (potato)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 →

Allium sativum · yield · Solanum tuberosum (potato)Results agree

6 papers: 6 positive, 0 negative or no effect

5 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

2 papers more in this group

See all 6 papers →

botanical · Phytophthora infestans · Solanum tuberosum (potato)Positive and negative results

18 papers: 16 positive, 2 negative or no effect

15 papers in the same direction as this paper · 2 in the opposite direction

  1. negative
  2. no effect
  3. positive

14 papers more in this group

See all 18 papers →

botanical · yield · Solanum tuberosum (potato)Positive and negative results

39 papers: 35 positive, 4 negative or no effect

34 papers in the same direction as this paper · 4 in the opposite direction

  1. negative
  2. negative
  3. no effect

35 papers more in this group

See all 39 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.