Effects of the fungicide Captan on some functional groups of soil microflora

Martı́nez-Toledo, M.V.; Salmerón, V.; Rodelas, B.; Pozo, Clementina; González‐López, Jesús

doi:10.1016/s0929-1393(97)00026-7

Cited by 70 publications

(41 citation statements)

References 16 publications

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“…Also, Colinas et al (1994) reported that captan significantly reduced bacterial numbers in a forest soil. Conversely, Martínez-Toledo et al (1998) reported that captan significantly increased numbers of total culturable bacteria in a treated soil, indicating that some bacterial populations can tolerate high dosages of this fungicide. In addition, different groups of soil bacteria can metabolize some pesticides that are also used as carbon sources (Singh et al 2002).…”

Section: Resultsmentioning

confidence: 97%

“…Different dosages of captan (e.g. between 5 and 1,000 mg kg -1 soil) have been applied to assess its effect on soil microorganisms and their activity, but few major effects have been observed (Martínez-Toledo et al 1998;Bailey et al 2003). However, other studies have indicated that higher concentrations (over 1,000 mg kg -1 soil) of captan retards microbial activity drastically and changes nitrogen dynamics significantly in treated soil Bailey et al 2003).…”

Section: Introductionmentioning

confidence: 99%

“…individual organisms, population of organisms and biochemical processes (Colinas et al 1994;Martínez-Toledo et al 1998;. However, information obtained is still based on limited number of studies performed using different single dosages of the biocides e.g.…”

Section: Introductionmentioning

confidence: 99%

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Successive soil treatment with captan or oxytetracycline affects non-target microorganisms

Piotrowska‐Seget

Engel

Nowak

et al. 2008

World J Microbiol Biotechnol

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Changes in microbial biomass and activity were determined in a sandy-loam soil treated with successive dosages of oxytetracycline (a bactericide) or captan (a fungicide) throughout 98 days of incubation under laboratory conditions. The numbers of culturable bacteria and fungi, total bacterial and fungal biomass (as amounts of phospholipid fatty acids, PLFA), the fungal/bacterial ratio, activities of acid and alkaline phosphatases and urease as well as concentrations of N-NH 4 + and N-NO 3 -were assessed. Both oxytetracycline and captan significantly decreased numbers of culturable bacteria whereas total bacterial biomass (bactPLFA) was not affected. Oxytetracycline did not effect on the fungal biomass, however their numbers were reduced after the first and second time of soil amendment with the bactericide. Conversely, fungal numbers and biomass (PLFA 18:2x6,9) significantly decreased in response to soil treatment with the fungicide. Compared to oxytetracycline, captan significantly decreased activities of acid and alkaline phosphatases. For urease activity, the decreased activity was only observed in the soil after the third dosage of captan. Both biocides significantly increased concentrations of N-NH 4 + and decreased concentrations of N-NO 3 -after the soil treatments. The results of this study indicate that successive soil treatment with oxytetracycline or captan dosages may negatively affect non-target soil microorganisms and their activities.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Successive soil treatment with captan or oxytetracycline affects non-target microorganisms

Piotrowska‐Seget

Engel

Nowak

et al. 2008

World J Microbiol Biotechnol

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“…Captan has been shown to augment the soil N status by reducing the microbial communities responsible for capturing N and by providing digestible carbon that can be immobilized into the bacterial biomass (Martínez-Toledo et al 1998;Megadi et al 2010a;Megadi et al 2010b). It is possible that the 56 kg ha −1 N release from the cereal rye at Kinston when compared to Beltsville during the first month of the study (Fig.…”

Section: Discussionmentioning

confidence: 98%

In situ validation of fungal N translocation to cereal rye mulches under no-till soybean production

et al. 2016

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Background and aims The ability of grass mulches to inhibit weed performance has been linked to their limitations on nitrogen availability to the weeds. Fungal translocation of N from the soil to the surface mulch has been confirmed in laboratories, but this mechanism has not been documented under field conditions. Methods Experiments used 15 N (NH 4 ) 2 SO 4 , 99.7 at.%, which was uniformly injected below the soil surface at a rate of 1 mg 15 N kg −1 soil. Some plots were treated with a fungicide (Captan) every 2 weeks after injection, while others were not treated. Nitrogen transfer was monitored by measuring levels in surface residue, soybean tissue, and extractable soil inorganic N pools.Results Despite the N release from the cereal rye (Secale cereale L.) tissues ranging from 15 to 50 kg N ha, there was a detectable increase in 15 N enrichment of 10-15 % in the cereal rye tissue. Six weeks after injection, tissue from the plots not treated with fungicide contained 36 % more 15 N. ConclusionsThe increased 15 N enrichment in the cereal rye mulch supports laboratory observations that soil inorganic N is translocated into surface mulch via fungal mechanisms. These findings illustrate microbialmediated sinks for nitrogen in cereal rye mulches in no-till soybean production systems.

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“…Margni [14] et al, 2002 concluded that the observed changes in the soil activity depend on the intensity and spectrum of activity as well as persistence of the parent chemicals or its metabolites. Pesticides might affect microorganisms by reducing their numbers, biochemical activity, diversity and changing the microbial community structure, Martinez-Toledo [15] et al, 1998; Smith [16] et al, 2000; Cycoń [17] and Kaczyńska, 2004. The toxic effect of pesticides may be toxic to many soil microorganisms because they can penetrate the cell, disturb the microbial metabolism and often cause the death of sensitive part of microbial populations.…”

Section: Introductionmentioning

confidence: 99%

Influence of fungicide (Carbendazim) and herbicides (2, 4-D and Metribuzin) on non-target beneficial soil microorganisms of Rhizospheric Soil of Tomato Crop

Mohiuddin¹

2013

IOSR-JESTFT

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Effects of the fungicide Captan on some functional groups of soil microflora

Cited by 70 publications

References 16 publications

Successive soil treatment with captan or oxytetracycline affects non-target microorganisms

Successive soil treatment with captan or oxytetracycline affects non-target microorganisms

In situ validation of fungal N translocation to cereal rye mulches under no-till soybean production

Influence of fungicide (Carbendazim) and herbicides (2, 4-D and Metribuzin) on non-target beneficial soil microorganisms of Rhizospheric Soil of Tomato Crop

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