Environmental Sustainability: Bioactivity of Leucaena leucocephala Leaves and Pesticide Residue Analysis in Tomato Fruits

Fabiyi, Oluwatoyin Adenike; Olatunji, Gabriel Ademola

doi:10.11118/actaun.2021.042

Cited by 11 publications

(2 citation statements)

References 22 publications

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“…Moreover, these types of biopesticides do not feature residue problems which are matter of significant concern for consumer and one which this study aims to encourage and explore [21]. Another, field study conducted by [22] on tomato to compared the effect of the application of Leucaena leucocephala leaf extracts as an alternative to carbofuran a synthetic nematicide against the control of nematodes and to look at the pesticide residues (MRLs) after application. The results revealed that pesticide residue (MRLs) was significantly (p = 0.05) higher in plots treated with Carbofuran compared with standard MRLs for Carbofuran in tomatoes.…”

Section: Evaluation New Bio-pesticides and Synthetic Molecules With H...mentioning

confidence: 99%

Steps Taken to Mitigate the Threats of Maximum Residue Limits (MRL) of Pesticides in Rice and Protecting Guyana Rice Exports Markets: Present and Future Prospects

Persaud,

Peters,

Joseph

et al. 2024

EJFOOD

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Governments of many countries are setting Maximum Residue Levels (MRLs) for food and feed being imported. To safeguard the threat of MRLs to rice exported from Guyana, the GRDB embarked on several research projects with the view to reduce MRLs and manage ‘Paddy bug’ (Oebalus poecilus (Dallas)). Studies included viz. identification of biological control agents; screening advance germplasm for tolerance; evaluation of bio-pesticides and synthetic molecules with higher MRLs; pesticide residue studies-growth stages, cut-off points and MRLs between paddy vs. cargo rice. Results from the bioagent survey found relatively low populations of predators such as damsel fly, lady bird beetle, spider, and dragon fly in Regions #2, #3, #4, #5, and #6. Also, there were isolated cases of parasitoids, viz. Telenomus podisi and Beskia aelops at very low levels. Results from the tolerance screening revealed that entry FG-18-222 recorded the highest percentage of damage and high incidence of paddy bugs (PB), while significantly (p < 0.05) lowest damage was recorded in FG-15-35 (2.13%), G17-109 (3.93%), followed by G-14-10 (4.10%) in 2022. These entries appeared to be the least preferred to PB due to the high presence and relatively low percentage of grain damage. However, all 12 entries were found to be susceptible to paddy bug lighting and feeding. Likewise, Bio-insecticide Boom (MRLs 3.0 mg/kg) was evaluated against PB and 162 ml/ac. was the most effective rate. In a separate experiment, Malathion (MRLs of 8.0 mg/kg) at 12–18 ml/ac. was most effective in controlling PB population compared to untreated control. There were no significant differences between these two treatments and the Pronto (Imidacloprid) check. The results from the pesticide residue analysis viz. Imidacloprid and Thiamethoxam, showed that systemic A.I. can only be applied once in a rice growing season for PB control no later than 67 DAS. Additionally, results comparing detected MRLs between paddy grains versus shelled rice grains revealed >84.41% reduction in the detected MRLs for these systemic A.I. Further research work is recommended in this MS to be undertaken to better understand the PB and mitigate the threat of MRLs with the view of developing an IPM approach to manage PB at the same time protect Guyana rice export markets.

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Section: Evaluation New Bio-pesticides and Synthetic Molecules With H...mentioning

confidence: 99%

Steps Taken to Mitigate the Threats of Maximum Residue Limits (MRL) of Pesticides in Rice and Protecting Guyana Rice Exports Markets: Present and Future Prospects

Persaud,

Peters,

Joseph

et al. 2024

EJFOOD

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“…are the principal PPNs which affects yield in several crops (Taniwiryonoc et al, 2009;Fabiyi, 2019;Fabiyi and Olatunji, 2021a). Largely, amidst the specie Meloidogyne incognita is a foremost pest of vegetables (Fabiyi and Olatunji, 2021b). Lettuce (Lactuca sativa), a leafy vegetable in the family Asteraceae grown for its leaves which are used in salad preparations is prone to M. incognita infection (William, 2012;de Souza Alonso et al, 2022;Fabiyi, 2022a).…”

Section: Introductionmentioning

confidence: 99%

MANAGEMENT OF Meloidogyne incognita DAMAGING LETTUCE: POTENTIAL OF CHROMATOGRAPHIC FRACTIONS AND EXTRACTS FROM Lawsonia Inermis

Fabiyi

2024

THE JAPS

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Plant parasitic nematodes (PPNs) are acknowledged as a paramount factor which limits the production of staple crops and vegetables. Preferred standard control method had been the use of synthetic nematicides. However, owing to the undesirable consequences of the residual effect of nematicides in the environment, the need for alternative approaches becomes pertinent and this has prompted investigation into the nematicidal potential of extracts from Lawsonia inermis for practicable application on lettuce plants infected with Meloidogyne incognita in field experiments. The leaves of L. inermis were collected and divided into four parts for separate extraction and these were compared with the standard nematicide carbofuran individually. The essential oil (EO) was significantly more potent than the other extracts from L. inermis. There was no significant difference between plants treated with carbofuran and EO. The fractions were significantly better than crude methanol and ethanol extracts of L. inermis. Reproduction of M. incognita on lettuce plant roots was considerably reduced by utilization of L. inermis extracts. Notably higher vegetative growth was observed in treated lettuce plants. The IR, 1 H-NMR and 13 C-NMR spectral data analysis confirmed the presence of sesquiterpenes in the chromatographic fraction. The GC-MS profile indicated phytol as the major constituent of the EO. The results obtained from this study indicates that extracts from L. inermis could be a viable option in the management of M. incognita damaging lettuce in dependable vegetable production.

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Application of Bacillus Species in the Management of Meloidogyne incognita

Fabiyi

2024

Sustainability in Plant and Crop Protection

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Environmental Sustainability: Bioactivity of Leucaena leucocephala Leaves and Pesticide Residue Analysis in Tomato Fruits

Cited by 11 publications

References 22 publications

Steps Taken to Mitigate the Threats of Maximum Residue Limits (MRL) of Pesticides in Rice and Protecting Guyana Rice Exports Markets: Present and Future Prospects

Steps Taken to Mitigate the Threats of Maximum Residue Limits (MRL) of Pesticides in Rice and Protecting Guyana Rice Exports Markets: Present and Future Prospects

MANAGEMENT OF Meloidogyne incognita DAMAGING LETTUCE: POTENTIAL OF CHROMATOGRAPHIC FRACTIONS AND EXTRACTS FROM Lawsonia Inermis

Application of Bacillus Species in the Management of Meloidogyne incognita

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