Effect of the Insecticide Carbofuran on Microbial Activities in Flooded Soil

Tirol, Agnes C.; Santiago, S.; Watanabe, Iwao

doi:10.1584/jpestics.6.83

Cited by 11 publications

(5 citation statements)

References 3 publications

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“…However, it differs from organophosphate compounds, regarding its brief inhibitory effect. [1][2][3] In the natural degradation process of carbofuran, the half-life of carbofuran is approximately 26 -368 days, depending on the temperature, soil pH, moisture, microbial population, and clay content. [4][5][6] Therefore, a large quantity of carbofuran residues contaminating in the environment and the crops exceed the maximum residue limit (MRL) of the agricultural standard by around 2 -5 times.…”

Section: Introductionmentioning

confidence: 99%

Facile and Sensitive Detection of Carbofnran Carbamate Pesticide in Rice and Soybean Using Coupling Reaction-based Surface-Enhanced Raman Scattering

et al. 2017

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In this research, a sensitive and selective method for detecting one of the most toxic insecticides, "carbofuran", in rice and soybean is presented. This method is based on the coupling reaction of diazonium ion combined with a surface-enhanced Raman scattering technique. Diazonium ion produced from p-aminothiophenol reacts specifically with carbofuran phenol from the hydrolysis of carbofuran. The generated azo compounds attach to the surface of silver nanoparticles via the Ag-S bond. Therefore, a strong Raman intensity can be obtained. The concentration of carbofuran can be determined by following the intensity of the peak at 1201 cm -1 , attributed to the C-N stretching vibration of the azo compound. The result shows a good linear correlation (R 2 = 0.9786) against carbofuran concentrations (0.1 -5 ppm) with a detection limit of 0.452 ppm. Our proposed protocol is insignificantly influenced by various common interferences. Moreover, this method has been successfully validated to determine carbofuran concentrations in rice and soybean with detection limits of 0.446 and 0.520 ppm, respectively.

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Section: Introductionmentioning

confidence: 99%

Facile and Sensitive Detection of Carbofnran Carbamate Pesticide in Rice and Soybean Using Coupling Reaction-based Surface-Enhanced Raman Scattering

et al. 2017

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“…Carbofuran insecticide inhibits invertebrates that feed on algae (grazers), thus, promoting blue green algae and biological N2 fixation (18).…”

Section: And Discussionmentioning

confidence: 99%

Impacts of fish and pesticide in lowland irrigated rice fields

et al. 2002

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This study examined the effects of fish and pesticide on selected components of the rice-cum-fish farming system using treatments without and with fish and pesticide conducted in two trials (wet and dry seasons). Polyculture of Nile tilapia Oreochromis niloticus and common carp Cyprinus carpio at 104kg/ha (1:1 ratio by weight) was employed.Results revealed some positive and negative impacts of fish and pesticide. Fish polyculture in rice field increased rice grain yield (10%) (P>0.05) in one out of two trials (trial 2). Based on the mean of two trials, the presence of fish decreased oligochaete abundance by 82% (P<0.01) while pesticide effect was positively manifested in increased rice grain yield but reduced oligochaetes (44%) (P<0.05). Fish growth and yield were not significantly affected by pesticide. No significant interaction effect of fish and pesticide were found for rice grain yield and aquatic oligochaetes. Findings on gross primary productivity (GPP) seemed to indicate the stimulating effects of fish and pesticide. Mean GPP from two trials was ten times higher in the pond refuge (2.74-3.42 g carbon m 2 day) than in the rice field (0.27-0.34 g carbon m-2 day-). This suggests the advantage of pond refuge, a contiguous part of rice field, for fish culture in rice-cum-fish system.

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“…Several reports indicate a selective effect of algicides on green algae, which promotes cyanobacterial growth (Yamagishi & Hashizume, 1974). Likewise it has been reported that cyanobacterial growth is favoured by the use of insecticides which inhibit the populations of grazers and have a selective effect on green algae (Tirol et al, 1981). However, in experiments in the rice-fields of Valencia (Spain) no effect of insecticide application on the number of cyanobacteria and N 2fixation was found (Leganés et al, 2001).…”

Section: Agronomical Practicesmentioning

confidence: 96%

A shallow water ecosystem: rice-fields. The relevance of cyanobacteria in the ecosystem

Fernández‐Valiente

Quesada²

2004

Limnetica

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In this paper we review the knowledge of the ecology of the largest freshwater ecosystem on Earth: the rice-fields, and in particular the rice-fields from Valencia (Spain) making a special consideration to the cyanobacteria present in this ecosystem. Rice-fields are artificial shallow aquatic ecosystems in which the land management and the agricultural practices together with the rice plant growth govern the major environmental variables affecting the aquatic biota and its relationships. Primary producers are dominated typically by macrophytic algae as Chara and cyanobacteria, both planktonic and benthic (beside the rice plants). Most rice-fields can be considered nutrient replete, since the fertilization inputs and the low ratio volume/surface make that main nutrients are typically available. Under these circumstances other environmental variables as photosynthetically active radiation availability or filtration rates and predation may explain the growth limitation of primary producers. Irradiance availability identify two periods within the cultivation cycle: when plants are short, irradiance is not limiting and some water chemistry variables (as pH, oxygen and dissolved inorganic C concentrations) change drastically as a function of the primary production; when plants are large and the canopy is intense, then irradiance is limiting and the water chemistry changes only slightly along the day. N 2 -fixation is a main activity in the N cycle in rice-fields, since N 2 -fixing cyanobacteria represent an important fraction of the aquatic biota of this ecosystem. We will discuss in detail the relevance of this process from the ecological point of view.

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Effect of the Insecticide Carbofuran on Microbial Activities in Flooded Soil

Cited by 11 publications

References 3 publications

Facile and Sensitive Detection of Carbofnran Carbamate Pesticide in Rice and Soybean Using Coupling Reaction-based Surface-Enhanced Raman Scattering

Facile and Sensitive Detection of Carbofnran Carbamate Pesticide in Rice and Soybean Using Coupling Reaction-based Surface-Enhanced Raman Scattering

Impacts of fish and pesticide in lowland irrigated rice fields

A shallow water ecosystem: rice-fields. The relevance of cyanobacteria in the ecosystem

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