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

Renáta Petrikovszki

Renáta Petrikovszki

Department of Zoology and Ecology, Institute for Wildlife Management and Nature Conservation, Hungarian University of Agriculture and Life SciencesGödöllő, Hungary
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Petrikovszki, Renáta
, 
Ferenc Tóth

Ferenc Tóth

Research Institute of Organic AgricultureBudapest, Hungary
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Tóth, Ferenc
 and 
Péter I Nagy

Péter I Nagy

Department of Zoology and Ecology, Institute for Wildlife Management and Nature Conservation, Hungarian University of Agriculture and Life SciencesGödöllő, Hungary
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Nagy, Péter I
  
Sep 01, 2023
Aqueous Extracts of Organic Mulch Materials Have Nematicide and Repellent Effect on Meloidogyne incognita Infective Juveniles: A Laboratory Study's Cover Image
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Article Category: Research Paper
Published Online: Sep 01, 2023
Received: Jan 18, 2023
DOI: https://doi.org/10.2478/jofnem-2023-0037
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© 2023 Renáta Petrikovszki et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1:

Representation of the sectors identified during the reading of the area choice test.
Representation of the sectors identified during the reading of the area choice test.

Figure 2:

Mortality rates (mean ± CI 95%) of Meloidogyne incognita juveniles of different concen-trations (0.1, 0.5, 1 and 5%) of various leaf litter, straw and compost extracts. (CI 95%: 95% of confidence interval) (One-way ANOVA, Tukey's pairwise comparisons (in the case of compost), Mann–Whitney U test; different letters in the same row indicate significant difference at p ≤ 0.05 level).
Mortality rates (mean ± CI 95%) of Meloidogyne incognita juveniles of different concen-trations (0.1, 0.5, 1 and 5%) of various leaf litter, straw and compost extracts. (CI 95%: 95% of confidence interval) (One-way ANOVA, Tukey's pairwise comparisons (in the case of compost), Mann–Whitney U test; different letters in the same row indicate significant difference at p ≤ 0.05 level).

Figure 3:

Area choice of Meloidogyne incognita juveniles with various leaf litter, straw and compost extracts (treated) and MQ-water (control). (Welch-test, p ≤ 0.05, p-value means that the number of M. incognita juveniles counted on the treated side is significantly different from that on the control side).
Area choice of Meloidogyne incognita juveniles with various leaf litter, straw and compost extracts (treated) and MQ-water (control). (Welch-test, p ≤ 0.05, p-value means that the number of M. incognita juveniles counted on the treated side is significantly different from that on the control side).

Tannic acid content of different concentrations of various leaf litter, straw, and compost extracts_

Tannic acid content (%)
Concentrations (%) 0 0.1 0.5 1 5
Extracts
Maple leaf litter n.d. 0.00521 0.02605 0.0521 0.2605
Oak leaf litter n.d. 0.00241 0.01205 0.0241 0.1205
Sycamore leaf litter n.d. 0.00209 0.01045 0.0209 0.1045
Walnut leaf litter n.d. 0.0008 0.004 0.008 0.04
Straw n.d. 0.00002 0.0001 0.0002 0.001
Compost n.d. n.d. n.d. n.d. n.d.

Values (mean ± CI 95%) of pH of different concentrations of various leaf litter, straw, and compost extracts_ (CI 95%: 95% of confidence interval)_

pH value
Concentrations (%) 0 0.1 0.5 1 5
Extracts
Maple leaf litter 7.02 ± 0.04 5.33 ± 0.01 4.81 ± 0.02 4.78 ± 0.03 4.43 ± 0.03
Oak leaf litter 7.02 ± 0.04 5.95 ± 0.01 5.42 ± 0.02 5.23 ± 0.03 4.99 ± 0.03
Sycamore leaf litter 7.02 ± 0.04 6.42 ± 0.01 6.09 ± 0.03 5.36 ± 0.03 5.12 ± 0.02
Walnut leaf litter 7.02 ± 0.04 6.30 ± 0.01 6.63 ± 0.03 6.68 ± 0.03 6.21 ± 0.04
Straw 7.02 ± 0.04 6.37 ± 0.02 6.41 ± 0.04 6.44 ± 0.01 6.46 ± 0.03
Compost 7.02 ± 0.04 6.90 ± 0.01 7.29 ± 0.03 7.57 ± 0.03 7.79 ± 0.06

Correlation between the concentration, the tannic acid content, the pH of mulch-derived extracts and the percentage mortality of the juveniles of Meloidogyne incognita_

Extracts Concentration/Mortality Tannic acid/Mortality pH/Mortality
Maple leaf litter 0.732 0.732 0.785
Oak leaf litter 0.710 0.710 0.854
Sycamore leaf litter 0.919 0.919 0.766
Walnut leaf litter 0.718 0.718 0.495
Straw 0.982 0.982 0.267
Compost 0.522 0.108 0.495
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