Paper · 2021 · Egyptian Journal of Crop Protection

Effect of some biological nematicides combined with oxamyl in the control of citrus nematode, Tylenchulus semipenetrans

Mohamed Swelam; Ibrahim omran; Mohamed AboKorah

7
claims
21
verbatim quotes
6
citations
3
research areas
—
Not open access

Abstract

This experiment was carried out to explore the role of two bio-nematicides namely: Mycorrhizae (Arbuscular mycorrhiza) and Nemafree (Serratia marcescens) with oxamyl singly and in combination to control citrus nematode, Tylenchulus semipenetrans under greenhouse conditions. Several methods of control were evaluated, using a chemical pesticide or biological agents (fungi and bacteria), or conducting chemical control, then biological control and vice versa, to determine their efficacy against citrus nematode infecting Valencia orange seedlings. Statistical analysis of the obtained data indicated that the single treatment of the oxamyl nematicide recorded the highest reduction % of citrus nematode larvae reaching (63.8 %), followed by Mycorrhizae (39.5%) and Nemafree (23.1%). The treatment of (oxamyl then Mycorrhizae) recorded the greatest effect in reducing nematode population, where larvae number after 4 weeks of application recorded 671.9 larvae per 100 cm3 of soil, as the lowest number of larvae compared to other treatments with a percentage of 48.3% of the total number of larvae, compared with 1300 larvae per 100 cm3 of soil in control. The seedlings treated with (oxamyl then Mycorrhizae) recorded the lowest number of females in citrus roots, reaching 8.0 female per gram root, with a reduction percentage of 71.4 % compared with other treatments.

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Claims 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Oxamyl alone reduced citrus nematode larvae by 63.8%, the highest single-treatment reduction.

Taxon
Valencia orange seedlingsCitrus sinensise1
Treatment
oxamyl nematicidee0
Interactor
Tylenchulus semipenetransTylenchulus semipenetranst0pathogen
Outcome
citrus nematode larvaee0
Direction
highest reductione0
Value
63.8 %e0

Not reportedComparator

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

Citrus sinensis
Citrus sinensis · TaxonEllen Levy Finch ( Elf ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Statistical analysis of the obtained data indicated that the single treatment of the oxamyl nematicide recorded the highest reduction % of citrus nematode larvae reaching (63.8 %), followed by Mycorrhizae (39.5%) and Nemafree (23.1%).”

✓ located verbatim in the source · abstract, characters 549–783 · show in text ↑
e1

“citrus nematode infecting Valencia orange seedlings”

✓ located verbatim in the source · abstract, characters 496–547 · show in text ↑
t0

“control of citrus nematode, Tylenchulus semipenetrans”

✓ located verbatim in the source · title, characters 66–119 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Mycorrhizae alone reduced citrus nematode larvae by 39.5%.

Taxon
Valencia orange seedlingsCitrus sinensise1
Treatment
Mycorrhizaee0
Interactor
Tylenchulus semipenetransTylenchulus semipenetranst0pathogen
Second interactor
Mycorrhizaee0symbiont
Outcome
citrus nematode larvaee0
Direction
reductione0
Value
39.5%e0

Not reportedComparator

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

Citrus sinensis
Citrus sinensis · TaxonEllen Levy Finch ( Elf ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Statistical analysis of the obtained data indicated that the single treatment of the oxamyl nematicide recorded the highest reduction % of citrus nematode larvae reaching (63.8 %), followed by Mycorrhizae (39.5%) and Nemafree (23.1%).”

✓ located verbatim in the source · abstract, characters 549–783 · show in text ↑
e1

“citrus nematode infecting Valencia orange seedlings”

✓ located verbatim in the source · abstract, characters 496–547 · show in text ↑
t0

“control of citrus nematode, Tylenchulus semipenetrans”

✓ located verbatim in the source · title, characters 66–119 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nemafree alone reduced citrus nematode larvae by 23.1%.

Taxon
Valencia orange seedlingsCitrus sinensise1
Treatment
Nemafreee0
Interactor
Tylenchulus semipenetransTylenchulus semipenetranst0pathogen
Second interactor
Nemafreee0biocontrol_agent
Outcome
citrus nematode larvaee0
Direction
reductione0
Value
23.1%e0

Not reportedComparator

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

Citrus sinensis
Citrus sinensis · TaxonEllen Levy Finch ( Elf ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Statistical analysis of the obtained data indicated that the single treatment of the oxamyl nematicide recorded the highest reduction % of citrus nematode larvae reaching (63.8 %), followed by Mycorrhizae (39.5%) and Nemafree (23.1%).”

✓ located verbatim in the source · abstract, characters 549–783 · show in text ↑
e1

“citrus nematode infecting Valencia orange seedlings”

✓ located verbatim in the source · abstract, characters 496–547 · show in text ↑
t0

“control of citrus nematode, Tylenchulus semipenetrans”

✓ located verbatim in the source · title, characters 66–119 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Oxamyl followed by Mycorrhizae gave the lowest soil larval count, 671.9 per 100 cm3 after four weeks versus 1300 in control.

Taxon
Valencia orange seedlingsCitrus sinensise1
Treatment
oxamyl then Mycorrhizaee0
Interactor
Tylenchulus semipenetransTylenchulus semipenetranst0pathogen
Second interactor
Mycorrhizaee0symbiont
Outcome
larvae numbere0
Direction
loweste0
Value
671.9 larvae per 100 cm3 of soile0
Qualifier
1300 larvae per 100 cm3 of soile0
Comparator
controle0

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

Citrus sinensis
Citrus sinensis · TaxonEllen Levy Finch ( Elf ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The treatment of (oxamyl then Mycorrhizae) recorded the greatest effect in reducing nematode population, where larvae number after 4 weeks of application recorded 671.9 larvae per 100 cm3 of soil, as the lowest number of larvae compared to other treatments with a percentage of 48.3% of the total number of larvae, compared with 1300 larvae per 100 cm3 of soil in control.”

✓ located verbatim in the source · abstract, characters 784–1156 · show in text ↑
e1

“citrus nematode infecting Valencia orange seedlings”

✓ located verbatim in the source · abstract, characters 496–547 · show in text ↑
t0

“control of citrus nematode, Tylenchulus semipenetrans”

✓ located verbatim in the source · title, characters 66–119 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Oxamyl followed by Mycorrhizae yielded 48.3% of total larvae.

Taxon
Valencia orange seedlingsCitrus sinensise1
Interactor
Tylenchulus semipenetransTylenchulus semipenetranst0pathogen
Outcome
total number of larvaee0
Value
48.3%e0

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

Citrus sinensis
Citrus sinensis · TaxonEllen Levy Finch ( Elf ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The treatment of (oxamyl then Mycorrhizae) recorded the greatest effect in reducing nematode population, where larvae number after 4 weeks of application recorded 671.9 larvae per 100 cm3 of soil, as the lowest number of larvae compared to other treatments with a percentage of 48.3% of the total number of larvae, compared with 1300 larvae per 100 cm3 of soil in control.”

✓ located verbatim in the source · abstract, characters 784–1156 · show in text ↑
e1

“citrus nematode infecting Valencia orange seedlings”

✓ located verbatim in the source · abstract, characters 496–547 · show in text ↑
t0

“control of citrus nematode, Tylenchulus semipenetrans”

✓ located verbatim in the source · title, characters 66–119 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Oxamyl followed by Mycorrhizae gave the lowest root female count, 8.0 per gram root.

Taxon
Valencia orange seedlingsCitrus sinensise1
Treatment
oxamyl then Mycorrhizaee0
Interactor
Tylenchulus semipenetransTylenchulus semipenetranst0pathogen
Second interactor
Mycorrhizaee0symbiont
Outcome
number of females in citrus rootse0
Direction
loweste0
Value
8.0 female per gram roote0
Comparator
other treatmentse0

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

Citrus sinensis
Citrus sinensis · TaxonEllen Levy Finch ( Elf ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The seedlings treated with (oxamyl then Mycorrhizae) recorded the lowest number of females in citrus roots, reaching 8.0 female per gram root, with a reduction percentage of 71.4 % compared with other treatments.”

✓ located verbatim in the source · abstract, characters 1157–1369 · show in text ↑
e1

“citrus nematode infecting Valencia orange seedlings”

✓ located verbatim in the source · abstract, characters 496–547 · show in text ↑
t0

“control of citrus nematode, Tylenchulus semipenetrans”

✓ located verbatim in the source · title, characters 66–119 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Oxamyl followed by Mycorrhizae reduced root females by 71.4% relative to other treatments.

Taxon
Valencia orange seedlingsCitrus sinensise1
Treatment
oxamyl then Mycorrhizaee0
Interactor
Tylenchulus semipenetransTylenchulus semipenetranst0pathogen
Second interactor
Mycorrhizaee0symbiont
Outcome
number of females in citrus rootse0
Direction
reductione0
Value
71.4 %e0
Comparator
other treatmentse0

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

Citrus sinensis
Citrus sinensis · TaxonEllen Levy Finch ( Elf ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The seedlings treated with (oxamyl then Mycorrhizae) recorded the lowest number of females in citrus roots, reaching 8.0 female per gram root, with a reduction percentage of 71.4 % compared with other treatments.”

✓ located verbatim in the source · abstract, characters 1157–1369 · show in text ↑
e1

“citrus nematode infecting Valencia orange seedlings”

✓ located verbatim in the source · abstract, characters 496–547 · show in text ↑
t0

“control of citrus nematode, Tylenchulus semipenetrans”

✓ located verbatim in the source · title, characters 66–119 · show in text ↑

oxamyl · Tylenchulus semipenetrans · Citrus sinensis (sweet orange)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 →

mycorrhiza · Tylenchulus semipenetrans · Citrus sinensis (sweet orange)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 →

insecticide · Tylenchulus semipenetrans · Citrus sinensis (sweet orange)Results agree

3 papers: 3 positive, 0 negative or no effect

2 papers in the same direction as this paper

  1. positive
  2. positive
See all 3 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.