<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>While the nematicidal effectiveness of mulching against root-knot nematodes (<italic>Meloidogyne</italic> spp.) is calculated within organic crop protection, underlying mechanisms are not yet fully explored. Laboratory experiments were set up to determine whether mulch-derived substances cause mortality directly, or repel <italic>Meloidogyne</italic> juveniles from crop rhizosphere. Mortality and area choice tests were conducted with mulch-derived extracts, supported by the measurements on tannic acid content and the pH values of extracts as supplementary examinations. In our study, leaf litter and straw extracts were generally found lethal to the juveniles, which is in line with the results from area preference tests. However, compost extract had no effect on <italic>Meloidogyne incognita</italic> juveniles. Tannic acid content showed positive correlation with mortality only in the case of straw and sycamore leaf litter extracts. Tannic acid and pH weakly correlated with repellent effect of the applied extracts generally. Our results have inspired further experiments to explore nematicidal components of leaf litters, contributing to the development of a new approach in crop protection based on the repellent effect of these materials.</p>
</abstract>

While the nematicidal effectiveness of mulching against root-knot nematodes (Meloidogyne spp.) is calculated within organic crop protection, underlying mechanisms are not yet fully explored. Laboratory experiments were set up to determine whether mulch-derived substances cause mortality directly, or repel Meloidogyne juveniles from crop rhizosphere. Mortality and area choice tests were conducted with mulch-derived extracts, supported by the measurements on tannic acid content and the pH values of extracts as supplementary examinations. In our study, leaf litter and straw extracts were generally found lethal to the juveniles, which is in line with the results from area preference tests. However, compost extract had no effect on Meloidogyne incognita juveniles. Tannic acid content showed positive correlation with mortality only in the case of straw and sycamore leaf litter extracts. Tannic acid and pH weakly correlated with repellent effect of the applied extracts generally. Our results have inspired further experiments to explore nematicidal components of leaf litters, contributing to the development of a new approach in crop protection based on the repellent effect of these materials.

Aqueous Extracts of Organic Mulch Materials Have Nematicide and Repellent Effect on <italic>Meloidogyne incognita</italic> Infective Juveniles: A Laboratory Study

Department of Zoology and Ecology, Institute for Wildlife Management and Nature Conservation

Hungarian University of Agriculture and Life Sciences

Journal of Nematology

This work is licensed under the Creative Commons Attribution 4.0 International License.

Aqueous Extracts of Organic Mulch Materials Have Nematicide and Repellent Effect on  Infective Juveniles: A Laboratory Study

While the nematicidal effectiveness of mulching against root-knot nematodes (Meloidogyne spp.) is calculated within organic crop protection, underlying...

Aqueous Extracts of Organic Mulch Materials Have Nematicide and Repellent Effect on Meloidogyne incognita Infective Juveniles: A Laboratory Study

Article Category: Research Paper

Published Online: Sep 01, 2023

Page range: -

Received: Jan 18, 2023

DOI: https://doi.org/10.2478/jofnem-2023-0037

Keywords
area choice, behavior, biological control, compost, leaf litter mulch, mortality, pH, tannic acid, wheat straw

© 2023 Renáta Petrikovszki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Aqueous Extracts of Organic Mulch Materials Have Nematicide and Repellent Effect on Meloidogyne incognita Infective Juveniles: A Laboratory Study

Article Category: Research Paper

Published Online: Sep 01, 2023

Page range: -

Received: Jan 18, 2023

DOI: https://doi.org/10.2478/jofnem-2023-0037

Keywordsarea choice, behavior, biological control, compost, leaf litter mulch, mortality, pH, tannic acid, wheat straw

© 2023 Renáta Petrikovszki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
area choice, behavior, biological control, compost, leaf litter mulch, mortality, pH, tannic acid, wheat straw