Variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem

This study examined the variation of generic composition and nematode indices to evaluate the soil health status under differently treated tomato growing experimental plots. The study was conducted from 2016 to 2018 in summer and winter seasons on a traditionally tomato (Lycopersicon esculentum) gro...

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Autores principales: Gupta, Dipak, Bhandari, Shivish, Bhusal, Daya Ram
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6804366/
https://www.ncbi.nlm.nih.gov/pubmed/31646210
http://dx.doi.org/10.1016/j.heliyon.2019.e02621
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author Gupta, Dipak
Bhandari, Shivish
Bhusal, Daya Ram
author_facet Gupta, Dipak
Bhandari, Shivish
Bhusal, Daya Ram
author_sort Gupta, Dipak
collection PubMed
description This study examined the variation of generic composition and nematode indices to evaluate the soil health status under differently treated tomato growing experimental plots. The study was conducted from 2016 to 2018 in summer and winter seasons on a traditionally tomato (Lycopersicon esculentum) growing farm in the Northern part of the Kathmandu valley, Nepal. Soil samples were taken from four types of replicating plots (each 5 × 5 m sq.) each using a different pest control method consisting of: cattle manure (MP), chemical pesticides (PP), botanical pesticides (BP), and a control plot (CP). The nematode communities were extracted, colonizer-persister (c-p) values assigned and ecological indices such as maturity index (MI), enrichment indexes (EI), structural index (SI) and channel index (CI) were calculated. The low abundance of all indices in pesticide applied plots during both seasons (winter and summer) was recorded. This result indicated pesticide application can be linked to the sensitivity of nematode genera. Nematode indices such as maturity index (MI), enrichment index (EI) and structural index (SI) were significantly affected with lower mean value especially in chemical pesticides applied plots during both the summer and winter seasons. The decomposition channel index (CI) did not exhibit significant variation in our analysis of treatment plots in either season. There was a positive response towards moisture content, soil temperature and nitrogen–carbon ratios for these indices. Nematode genera and indices showed significant variation for pest management practices in tomato grown plots.
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spelling pubmed-68043662019-10-23 Variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem Gupta, Dipak Bhandari, Shivish Bhusal, Daya Ram Heliyon Article This study examined the variation of generic composition and nematode indices to evaluate the soil health status under differently treated tomato growing experimental plots. The study was conducted from 2016 to 2018 in summer and winter seasons on a traditionally tomato (Lycopersicon esculentum) growing farm in the Northern part of the Kathmandu valley, Nepal. Soil samples were taken from four types of replicating plots (each 5 × 5 m sq.) each using a different pest control method consisting of: cattle manure (MP), chemical pesticides (PP), botanical pesticides (BP), and a control plot (CP). The nematode communities were extracted, colonizer-persister (c-p) values assigned and ecological indices such as maturity index (MI), enrichment indexes (EI), structural index (SI) and channel index (CI) were calculated. The low abundance of all indices in pesticide applied plots during both seasons (winter and summer) was recorded. This result indicated pesticide application can be linked to the sensitivity of nematode genera. Nematode indices such as maturity index (MI), enrichment index (EI) and structural index (SI) were significantly affected with lower mean value especially in chemical pesticides applied plots during both the summer and winter seasons. The decomposition channel index (CI) did not exhibit significant variation in our analysis of treatment plots in either season. There was a positive response towards moisture content, soil temperature and nitrogen–carbon ratios for these indices. Nematode genera and indices showed significant variation for pest management practices in tomato grown plots. Elsevier 2019-10-18 /pmc/articles/PMC6804366/ /pubmed/31646210 http://dx.doi.org/10.1016/j.heliyon.2019.e02621 Text en © 2019 The Author(s) http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Gupta, Dipak
Bhandari, Shivish
Bhusal, Daya Ram
Variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem
title Variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem
title_full Variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem
title_fullStr Variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem
title_full_unstemmed Variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem
title_short Variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem
title_sort variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6804366/
https://www.ncbi.nlm.nih.gov/pubmed/31646210
http://dx.doi.org/10.1016/j.heliyon.2019.e02621
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