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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.