The effects of neem extract and azadirachtin on soil microorganisms

Both neem extract and azadirachtin are widely used in agriculture as organic pesticides because they are nontoxic to humans, animals, and the environment. However, their effects on soil microorganisms and plant growth-promoting rhizobacteria (PGPR), which directly affect soil quality, remain largely...

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Autores principales:	Sarawaneeyaruk,S, Krajangsang,S, Pringsulaka,O
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2015
Materias:	Neem extract Azadirachtin soil microorganisms rhizosphere microorganisms plant growth-promoting rhizobacteria
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000400020
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spelling	oai:scielo:S0718-951620150004000202016-01-14The effects of neem extract and azadirachtin on soil microorganismsSarawaneeyaruk,SKrajangsang,SPringsulaka,O Neem extract Azadirachtin soil microorganisms rhizosphere microorganisms plant growth-promoting rhizobacteria Both neem extract and azadirachtin are widely used in agriculture as organic pesticides because they are nontoxic to humans, animals, and the environment. However, their effects on soil microorganisms and plant growth-promoting rhizobacteria (PGPR), which directly affect soil quality, remain largely unexplored. In this study, the effects of neem extract and azadirachtin on the activity of soil microbes and rhizosphere microorganisms was evaluated. We found that 0.1 and 0.4 gmL-1 of the extract and 1.25 and 2.5 µgmL-1 of azadirachtin inhibited the activity of soil microorganisms in vitro. Treating soil with azadirachtin for two months reduced the number of microorganisms present, while two months of treatment with neem extract increased the number of microorganisms in both the soil and the rhizosphere. The phytopathogenic bacterium Pectobacterium carotovorum was more resistant to azadirachtin than Rhizobium sp. Moreover, treatment of mung beans with neem extract or azadirachtin reduced the number of root nodules and Trichoderma asperellum in the rhizosphere, when compared to the control.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.15 n.4 20152015-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000400020en10.4067/S0718-95162015005000075
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Neem extract Azadirachtin soil microorganisms rhizosphere microorganisms plant growth-promoting rhizobacteria
spellingShingle	Neem extract Azadirachtin soil microorganisms rhizosphere microorganisms plant growth-promoting rhizobacteria Sarawaneeyaruk,S Krajangsang,S Pringsulaka,O The effects of neem extract and azadirachtin on soil microorganisms
description	Both neem extract and azadirachtin are widely used in agriculture as organic pesticides because they are nontoxic to humans, animals, and the environment. However, their effects on soil microorganisms and plant growth-promoting rhizobacteria (PGPR), which directly affect soil quality, remain largely unexplored. In this study, the effects of neem extract and azadirachtin on the activity of soil microbes and rhizosphere microorganisms was evaluated. We found that 0.1 and 0.4 gmL-1 of the extract and 1.25 and 2.5 µgmL-1 of azadirachtin inhibited the activity of soil microorganisms in vitro. Treating soil with azadirachtin for two months reduced the number of microorganisms present, while two months of treatment with neem extract increased the number of microorganisms in both the soil and the rhizosphere. The phytopathogenic bacterium Pectobacterium carotovorum was more resistant to azadirachtin than Rhizobium sp. Moreover, treatment of mung beans with neem extract or azadirachtin reduced the number of root nodules and Trichoderma asperellum in the rhizosphere, when compared to the control.
author	Sarawaneeyaruk,S Krajangsang,S Pringsulaka,O
author_facet	Sarawaneeyaruk,S Krajangsang,S Pringsulaka,O
author_sort	Sarawaneeyaruk,S
title	The effects of neem extract and azadirachtin on soil microorganisms
title_short	The effects of neem extract and azadirachtin on soil microorganisms
title_full	The effects of neem extract and azadirachtin on soil microorganisms
title_fullStr	The effects of neem extract and azadirachtin on soil microorganisms
title_full_unstemmed	The effects of neem extract and azadirachtin on soil microorganisms
title_sort	effects of neem extract and azadirachtin on soil microorganisms
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000400020
work_keys_str_mv	AT sarawaneeyaruks theeffectsofneemextractandazadirachtinonsoilmicroorganisms AT krajangsangs theeffectsofneemextractandazadirachtinonsoilmicroorganisms AT pringsulakao theeffectsofneemextractandazadirachtinonsoilmicroorganisms AT sarawaneeyaruks effectsofneemextractandazadirachtinonsoilmicroorganisms AT krajangsangs effectsofneemextractandazadirachtinonsoilmicroorganisms AT pringsulakao effectsofneemextractandazadirachtinonsoilmicroorganisms
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The effects of neem extract and azadirachtin on soil microorganisms

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