Reduction of dieldrin concentration in cucumber fruits using Cucurbita rootstocks and activated carbon

Hashimoto, Yoshiko

doi:10.1584/jpestics.g06-48

Cited by 19 publications

(12 citation statements)

References 15 publications

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“…Inputs of amorphous carbons (Guo et al 1991; Martinez-iñ igo and Almendros 1992; Sluszny et al 1999) and condensed carbons (Guo et al 1991) have been demonstrated to increase the capacity of soils to absorb pesticides. Furthermore, AC has been found to reduce dieldrin uptake by cucumber (Hilber et al 2009;Hashimoto 2007) and heptachlor epoxide uptake by pumpkin (Murano et al 2009). However, AC is usually more expensive than biochars.…”

Section: Discussionmentioning

confidence: 99%

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Suppressive effect of soil application of carbonaceous adsorbents on dieldrin uptake by cucumber fruits

Saito

Otani

Seike

et al. 2011

Soil Science and Plant Nutrition

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The use of aldrin and dieldrin as pesticides was prohibited in 1975 in Japan. However, some of the soils still remain contaminated with dieldrin, because aldrin is easily oxidized to dieldrin and dieldrin is extremely stable in soil. In recent years, dieldrin at concentrations exceeding the limit set by the Food Sanitation Law of Japan (dieldrin < 0.02 mg kg -1 fresh weight) has been detected in cucumber fruits produced in some areas of Japan. We examined the effect of the soil application of selected adsorbents on reducing dieldrin concentrations in cucumber fruits in three steps of pot experiments. Among the three types of biochar made from wood chip, rice husk, and bamboo, wood chip charcoal was found to be the most effective (pot experiment 1). The effect of wood chip charcoal was enhanced by high-temperature burning and crushing (pot experiment 2). However, the effect of activated carbon was superior to that of optimized (hightemperature-treated and crushed) wood chip charcoal (pot experiment 3). Therefore, activated carbon was selected as the most effective adsorbent. The effect of activated carbon to reduce dieldrin concentrations in cucumber fruits was confirmed in a field experiment, and the effect continued to a certain extent for at least four years after the application. We calculated the cost of activated carbon necessary to maintain a sufficient suppressive effect in the field, and this cost would appear to be acceptable to cucumber farmers. Consequently, application of activated carbon to dieldrin-contaminated soils can be considered a promising practical technique for reducing dieldrin concentrations in cucumber fruits.

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Section: Discussionmentioning

confidence: 99%

“…Further, some reports have suggested that activated carbons (ACs) are effective in suppressing dieldrin uptake by cucumber (Hashimoto 2007;Hilber et al 2009). Cucumber farmers consider that AC is relatively expensive compared with those of biochar such as wood chip charcoal.…”

Section: Introductionmentioning

confidence: 99%

Suppressive effect of soil application of carbonaceous adsorbents on dieldrin uptake by cucumber fruits

Saito

Otani

Seike

et al. 2011

Soil Science and Plant Nutrition

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“…30) Therefore, the effectiveness of pesticide reduction in crops cultivated in pots by setting long SAPs may also be lower than that in fields. Hashimoto et al 4) reported that application of activated carbon to fields reduced dieldrin concentrations in cucumber fruits to 42-64% of those cultivated in non-treated fields. The effectiveness of dieldrin reduction in cucumber fruits by applying activated carbon roughly corresponds to the results obtained in the present study by setting long SAPs.…”

Section: Influence Of Soil-aging Periods (Saps) On Pesticide Concentrmentioning

confidence: 99%

“…Recent studies of crops contaminated by persistent organic pollutants (POPs), including dieldrin and heptachlor exo-epoxide, showed that application of carbonaceous adsorbents, such as activated carbon, to soils [4][5][6] and a grafting technique using a low-uptake rootstock 4,7) effectively decreased concentrations of POPs in cucurbit crops. However, the pesticides on the market are more degradable than POPs in soils.…”

Section: Introductionmentioning

confidence: 99%

Relationship between plant uptake of pesticides and water-extractable residue in Japanese soils

Motoki

Iwafune²,

Seike

et al. 2015

Journal of Pesticide Science

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The relationship between pesticide concentrations in Komatsuna (Brassica rapa var. perviridis) shoots and the extractable concentrations in soils by a sequential soil-extraction method was investigated in 8 pesticides and in 4 soils. Concentrations of many pesticides in Komatsuna shoots showed higher positive correlation with water-extractable than with total-extractable soil concentrations. We also examined the effects of the soil-aging periods (SAPs) between pesticide applications and sowing on pesticide concentrations in Komatsuna shoots. Pesticide concentrations in Komatsuna shoots and soil-water extracts decreased with increasing SAPs. These results imply that estimating the pesticide concentrations in crops based on water-extractable concentrations in soil and setting the appropriate SAPs prevent contamination of crops by pesticide residues in soil. However, the correlation between pesticide concentrations in Komatsuna shoots and water extracts in soils, and the effectiveness of pesticide reduction in Komatsuna shoots by setting long SAPs differed according to the pesticide type. Hence, the applicability of the water-extraction method should be verified for each pesticide.

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“…[11][12] Dieldrin detected from cucumber was supposed to have come from soil contaminated in the past. 17) After implementation of the Positive List System, low level residues supposed to be drifts from other crops exceeded the MRL or uniform limit. Table 6 lists pesticide residues suggestive of unregistered application.…”

Section: Non-acceptable Residuesmentioning

confidence: 99%

Pesticide residues in domestic agricultural products monitored in Hyogo Prefecture, Japan, FY 1995-2009

et al. 2011

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During a 15-year monitoring survey (April 1995-March 2010 of pesticide residues in agricultural products, 1542 domestic samples (cereals, vegetables, fruits, etc.) collected in Hyogo prefecture, Japan, were analyzed. The number of pesticides tested increased annually from 110 to 615, and 2198 pesticides, including trace levels, were detected in 844 samples. Annual detection rates of positive samples ranged from 36 to 77% during 15 years, and the average rate was 65% in the past 5 years. With the increase in pesticides tested, total detections in FY 2005-2009 markedly increased, trace level detections composed more than half of all detections, and the numbers of samples containing 4 or more residues increased two-fold. Procymidone and iprodione were frequently found in vegetables, and kresoxim-methyl, acetamiprid, iprodione and captan in fruits. In addition, the detection of carbendazim, dinotefuran and imidacloprid increased in the past 5 years. Violations of MRLs or the uniform limit (0.01 mg/g) were observed in 9 samples (0.6%), among which pesticides unregistered for application were detected in 8 samples. The residue levels of unregistered pesticides should be assessed, as the uniform limit was applied for their regulation in many cases.

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Reduction of dieldrin concentration in cucumber fruits using Cucurbita rootstocks and activated carbon

Cited by 19 publications

References 15 publications

Suppressive effect of soil application of carbonaceous adsorbents on dieldrin uptake by cucumber fruits

Suppressive effect of soil application of carbonaceous adsorbents on dieldrin uptake by cucumber fruits

Relationship between plant uptake of pesticides and water-extractable residue in Japanese soils

Pesticide residues in domestic agricultural products monitored in Hyogo Prefecture, Japan, FY 1995-2009

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