Paper · 2023 · East African Journal of Agriculture and Biotechnology

Evaluation of Selected Bio-insecticides on Tuta absoluta and Liriomyza trifolii on Tomato in Open Fields in Tharaka Nithi County, Kenya

Ngugi Ceciliah Njoki; Mbaka Jesca Njeri; Hellen Muthengi

8
claims
13
verbatim quotes
2
citations
2
research areas
✓
Open access · cc-by

Abstract

A field experiment to determine the effect of Azadirachtin, Bacillus thuringiensis, Pyrethrin + Garlic extract, and Petroleum mineral oil in managing the tomato leaf miner (Tuta absoluta) and serpentine leaf miner (Liriomyza trifolii) was conducted for two seasons between December 2016 and November 2017 at Chuka, Tharaka-Nithi County. Tomato variety, Kilele F1, was planted in the field to evaluate the effect of selected commercial products on T. absoluta and L. trifolii. The product included Azadirachtin 0.03%, Pyrethrin + Garlic extract, Bacillus thuringiensis var Kurstaki 5% w/w), and Petroleum mineral oil 98.8%. There were five treatments in a randomized complete block design (RCBD) in three replicates. There was an application of sterile water in the control experiment. There was a significant difference (P < 0.05) between the biocontrol products and the control. The Azadirachtin at 0.03% treatments had the least number of leaves damaged by T. absoluta (0.43; 1.67) in the control treatment (1.7; 5.27) in both seasons. In both seasons, there were significant differences (P < 0.05) between treatments in the number of leaflets damaged by L. trifolii. In season 1, the least damaged fruits per plant (1.33) were recorded in Azadirachtin at 0.03%, compared to the highest damage (5.0) in the untreated control. In the second season, the low fruit damage (0.67) was recorded in Petroleum mineral oil, and the highest (2.33) was in the untreated control. The study concluded that Azadirachtin 0.03%, Bacillus thuringiensis var Kurstaki 5% w/w, and Petroleum mineral oil were efficacious in managing T. absoluta and L. trifolii and be integrated into the existing tomato pest management strategies.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

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Claims 8

Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Biocontrol products differed significantly from the control.

Treatment
biocontrol productse0
Outcome
significant differencee0
Comparator
controle0

Not reportedDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“There was a significant difference (P < 0.05) between the biocontrol products and the control”

✓ located verbatim in the source · abstract, characters 785–878 · show in text ↑
t0

“Tomato”

✓ located verbatim in the source · title, characters 83–89 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Azadirachtin at 0.03% yielded the least Tuta absoluta leaf damage in both seasons.

Treatment
Azadirachtin at 0.03%e0
Interactor
T. absolutaTuta absolutae0pest
Outcome
number of leaves damaged by T. absolutae0
Direction
leaste0
Value
0.43; 1.67e0
Qualifier
1.7; 5.27e0
Comparator
control treatmente0

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Tuta absoluta
Tuta absoluta · InteractorPatrick Clement from West Midlands, England · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The Azadirachtin at 0.03% treatments had the least number of leaves damaged by T. absoluta (0.43; 1.67) in the control treatment (1.7; 5.27) in both seasons”

✓ located verbatim in the source · abstract, characters 880–1036 · show in text ↑
t0

“Tomato”

✓ located verbatim in the source · title, characters 83–89 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Treatments differed significantly in Liriomyza trifolii leaflet damage in both seasons.

Treatment
treatmentse0
Interactor
L. trifoliiLiriomyza trifoliie0pest
Outcome
number of leaflets damaged by L. trifoliie0

Not reportedComparatorDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Liriomyza trifolii
Liriomyza trifolii · Interactor · picture from its Wikimedia Commons categoryLonsdale O, Murphy ST, Scheffer SJ · CC BY 4.0 · Wikimedia Commons ↗

Verbatim

e0

“In both seasons, there were significant differences (P < 0.05) between treatments in the number of leaflets damaged by L. trifolii”

✓ located verbatim in the source · abstract, characters 1038–1168 · show in text ↑
t0

“Tomato”

✓ located verbatim in the source · title, characters 83–89 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Season 1 fruit damage was lowest with Azadirachtin at 0.03%, at 1.33 versus 5.0 in control.

Treatment
Azadirachtin at 0.03%e0
Outcome
damaged fruits per plante0
Direction
leaste0
Value
1.33e0
Qualifier
5.0e0
Comparator
untreated controle0

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“In season 1, the least damaged fruits per plant (1.33) were recorded in Azadirachtin at 0.03%, compared to the highest damage (5.0) in the untreated control”

✓ located verbatim in the source · abstract, characters 1170–1326 · show in text ↑
t0

“Tomato”

✓ located verbatim in the source · title, characters 83–89 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Season 2 fruit damage was lowest with petroleum mineral oil, at 0.67 versus 2.33 in control.

Treatment
Petroleum mineral oile0
Outcome
fruit damagee0
Direction
lowe0
Value
0.67e0
Qualifier
2.33e0
Comparator
untreated controle0

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“In the second season, the low fruit damage (0.67) was recorded in Petroleum mineral oil, and the highest (2.33) was in the untreated control”

✓ located verbatim in the source · abstract, characters 1328–1468 · show in text ↑
t0

“Tomato”

✓ located verbatim in the source · title, characters 83–89 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend Azadirachtin for tomato leaf miner management.

Treatment
Azadirachtin 0.03%e0
Outcome
be integrated into the existing tomato pest management strategiese0

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Azadirachtin 0.03%, Bacillus thuringiensis var Kurstaki 5% w/w, and Petroleum mineral oil were efficacious in managing T. absoluta and L. trifolii and be integrated into the existing tomato pest management strategies”

✓ located verbatim in the source · abstract, characters 1495–1711 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend Bacillus thuringiensis for tomato leaf miner management.

Treatment
Bacillus thuringiensis var Kurstaki 5% w/we0
Interactor
Bacillus thuringiensis var KurstakiBacillus thuringiensise0biocontrol_agent
Outcome
be integrated into the existing tomato pest management strategiese0

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Bacillus thuringiensis
Bacillus thuringiensis · InteractorSam LaRussa · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“Azadirachtin 0.03%, Bacillus thuringiensis var Kurstaki 5% w/w, and Petroleum mineral oil were efficacious in managing T. absoluta and L. trifolii and be integrated into the existing tomato pest management strategies”

✓ located verbatim in the source · abstract, characters 1495–1711 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend petroleum mineral oil for tomato leaf miner management.

Treatment
Petroleum mineral oile0
Outcome
be integrated into the existing tomato pest management strategiese0

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Azadirachtin 0.03%, Bacillus thuringiensis var Kurstaki 5% w/w, and Petroleum mineral oil were efficacious in managing T. absoluta and L. trifolii and be integrated into the existing tomato pest management strategies”

✓ located verbatim in the source · abstract, characters 1495–1711 · show in text ↑

azadirachtin · yield · Solanum lycopersicum (tomato)Positive and negative results

6 papers: 5 positive, 1 negative or no effect

4 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive

2 papers more in this group

See all 6 papers →

azadirachtin · Tuta absoluta · Solanum lycopersicum (tomato)Results agree

10 papers: 10 positive, 0 negative or no effect

9 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

6 papers more in this group

See all 10 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.