Vertical Distribution of Plant-Parasitic Nematodes in Sweet Potato Cover

.blurhash-client-img { display: none !important; }

Vertical Distribution of Plant-Parasitic Nematodes in Sweet Potato

Journal of Nematology

Volume 54 (2022): Issue 1 (February 2022)

By: Bernard Kemboi, Hannah Karuri, Justine M. Nyaga and Aaron J. Kingsbury

Open Access

|Aug 2022

Figures & Tables

Soil sampling sites at Central, Manyatta, and Nembure regions in Embu County, Kenya.

Abundance (mean ± standard error) of nematode genera in 250 g of soil from sweet potato fields in Central, Manyatta, and Nembure regions of Embu County, Kenya at 0 cm to 30 cm and 30 cm to 60 cm depths. Cos: Coslenchus; Hel: Helicotylenchus; Hem: Hemicycliophora; Hop: Hoplolaimus; Lon: Longidorus; Mal: Malenchus; Mel: Meloidogyne; Pra: Pratylenchus; Psi: Psilenchus; Rol: Rotylenchulus; Rot: Rotylenchus; Scut: Scutellonema; Tric: Trichodorus; Tyrh: Tylenchorhynchus; Tyl: Tylenchus; Xip: Xiphinema.

Abundance (mean ± standard error) of nematode genera in 250 g of soil from sweet potato fields in Central, Nembure, and Manyatta regions of Embu County, Kenya. Cos: Coslenchus; Hel: Helicotylenchus; Hem: Hemicycliophora; Hop: Hoplolaimus; Lon: Longidorus; Mal: Malenchus; Mel: Meloidogyne; Pra: Pratylenchus; Psi: Psilenchus; Rol: Rotylenchulus; Rot: Rotylenchus; Scut: Scutellonema; Tric: Trichodorus; Tyrh: Tylenchorhynchus; Tyl: Tylenchus; Xip: Xiphinema.

Additive γ diversity partitioning (into α and β components) of (A) nematode genus richness, (B) Shannon–Weaver diversity, and (C) Simpson diversity in sweet potato fields in Central, Manyatta, and Nembure regions in Embu County, Kenya at 0 cm to 30 cm and 30 cm to 60 cm depths.

NMDS ordination of nematode communities in sweet potato fields in Central, Manyatta, and Nembure regions in Embu County, Kenya at 0 cm to 30 cm and 30 cm to 60 cm depths (NMDS Stress = 0.2). NMDS, nonmetric multidimensional scaling.

Coinertia analysis of nematode genera and soil properties at 0 cm to 30 cm depth in Central, Manyatta, and Nembure regions in Embu County, Kenya (RV = 0.13, P = 0.05, Monte Carlo permutation test).

Soil properties in sweet potato fields at 0–30 cm depth in Central, Manyatta, and Nembure regions in Embu County, Kenya_

Soil property	Central		Manyatta		Nembure		P value
	Mean	SE	Mean	SE	Mean	SE
pH	4.89	0.23	4.70	0.16	4.72	0.14	0.74
Total Nitrogen%	0.36	0.01	0.38	0.02	0.29	0.03	0.02*
Total Organic Carbon%	4.04	0.14	4.25	0.20	3.36	0.31	0.02*
Phosphorus ppm	25.31	4.43	17.33	2.09	14.86	2.76	0.08
Potassium meq%	0.92	0.16	1.10	0.12	0.84	0.14	0.42
Calcium meq%	2.56	0.69	2.55	0.65	1.81	0.62	0.67
Magnesium meq%	3.39	0.34	3.29	0.33	3.29	0.28	0.97
Manganese meq%	0.79	0.04	0.85	0.05	0.66	0.05	0.02*
Copper ppm	4.83	2.09	3.55	1.34	1.26	0.30	0.26
Iron ppm	27.25	4.15	33.38	7.11	26.68	5.00	0.64
Zinc ppm	34.12	3.49	23.01	2.54	16.18	2.47	<0.0001***
Sodium meq%	0.58	0.03	0.44	0.03	0.46	0.04	0.02*
Sand (%)	10.00	3.89	15.87	5.50	13.71	6.24	0.72
Clay (%)	77.63	3.73	72.13	5.28	75.29	6.15	0.74
Silt (%)	12.38	0.33	12.00	0.34	11.00	0.35	0.02*

Two-way analysis of variance (P values) of region, depth, and their interaction on nematode genera, Pielou’s evenness, Shannon–Weaver, and Simpson diversity indices in sweet potato fields in Central, Manyatta, and Nembure regions of Embu County, Kenya_

	Region	Depth	Region × depth
Nematode genera
Coslenchus	0.11	0.64	0.72
Helicotylenchus	0.97	0.97	0.93
Longidorus	0.98	0.08	0.14
Meloidogyne	0.4	0.35	0.71
Pratylenchus	0.1	0.91	0.81
Rotylenchulus	0.83	0.68	0.83
Rotylenchus	0.65	0.36	0.96
Scutellonema	0.08	0.81	0.75
Trichodorus	0.49	0.17	0.3
Tylenchorhynchus	0.06	0.33	0.83
Tylenchus	0.15	0.32	0.01*
Xiphinema	0.78	0.9	0.07
Psilenchus	<0.0001***	0.93	1
Hemicycliophora	0.01*	0.9	0.98
Hoplolaimus	0.05*	0.56	0.71
Malenchus	0.15	0.79	0.93
Diversity indices
Shannon–Weaver diversity	0.04*	0.03*	0.53
Simpson diversity	0.08	0.05*	0.84
Pielou’s evenness	0.89	0.41	0.24

Simpson and Shannon–Weaver diversity indices of nematode communities in sweet potato fields in Central, Manyatta, and Nembure regions in Embu County, Kenya at 0 cm to 30 cm and 30 cm to 60 cm depths_

Region	Shannon–Weaver diversity		Simpson diversity
	Mean	SE	Mean	SE
Central	1.29^a,b	0.06	0.64^a	0.02
Manyatta	1.36^a	0.06	0.67^a	0.02
Nembure	1.12^b	0.08	0.58^a	0.04
Depth
0–30 cm	1.38^a	0.05	0.68^a	0.02
30–60 cm	1.15^b	0.06	0.59^b	0.03

DOI: https://doi.org/10.2478/jofnem-2022-0025 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X

Journal RSS Feed

Language: English

Submitted on: Mar 10, 2022

Published on: Aug 21, 2022

Published by: Society of Nematologists, Inc.

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

Keywords:

gamma diversity,

Related subjects:

Life sciences, other

© 2022 Bernard Kemboi, Hannah Karuri, Justine M. Nyaga, Aaron J. Kingsbury, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

Previous article Volume 54 (2022): Issue 1 (February 2022)Next article