Degradation and biological impact of chlorpyrifos-methyl on stored wheat and pirimiphos-methyl on stored maize in western Canada

White, N. D. G.; Jayas, Digvir S.; Demianyk, C. J.

doi:10.1016/s0022-474x(96)00049-5

Cited by 11 publications

(6 citation statements)

References 13 publications

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“…In wheat and oat grains treated with PMM, for example, Lucini and Molinari (2011) did not detect residue degradation, whereas in maize stored for 18 months. White et al (1997) found similar results. In rice, Yu et al (2014) determined K coefficient of 0.384 for DDVP, 0.025 for CPM and 0.020 for PPM.…”

Section: Dynamics Of Insecticide Residuessupporting

confidence: 62%

Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains

Strada¹,

Bruno²,

Nassetta³

et al. 2021

AgriS

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The aims of this work were to monitor the dissipation dynamics of the organophosphate insecticides applied to corn grains stored in supervised experiments, establish the dissipation dynamics and determine the minimum period post application necessary to comply with the established commercial standards. The insecticides dichlorvos (DDVP), hlorpyrifosmethyl+deltamethrin (CPM) and pirimiphos-methyl (PMM) were applied to maize grains, which were then stored for 120 days. The samples were processed and extracted using the QuEChERS technique and the pesticide residues were identified and quantified by gas chromatography-mass spectrometry. Deltamethrin residues were not analized. After 90 days of storage, more than 80 % of the initial residue had been degraded, and after 120 days the residues were below the detection limit (LoD). DDVP, CPM and PMM residues followed a first order degradation dynamics [Ct = C0×e(-kt)], with k values of 0.384, 0.025 and 0.020 and estimated half-lives of 1.8, 27.7 and 34.7 days, respectively. These results show that at recommended dosages, the insecticides CPM and PMM are safe for use on stored maize grains; DDVP results provide additional evidence further reasserting its prohibition, which dates back to 2018.

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Section: Dynamics Of Insecticide Residuessupporting

confidence: 62%

Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains

Strada¹,

Bruno²,

Nassetta³

et al. 2021

AgriS

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show abstract

“…Foodborne chlorpyriphos-methyl is readily metabolized and eliminated by fish, and its relative low biomagnification potential compared to POPs (Varó et al, 2002) could explain the non-detectable fillet levels in fish that were fed on low background levels in the present study. In addition, long term storage at high temperatures could potentially affect the level of chlorpyrifos-methyl, but not pirimiphos-methyl residues in corn products (White et al, 1997). In the present trial, no assessment of the pesticide level during storage was made, which could have contributed to possible absence of detectable pesticides in the fish fillets of fish fed on the feeds.…”

Section: Target and Suspect Screening Of Feed Ingredients Feed And Tmentioning

confidence: 77%

Comprehensive strategy for pesticide residue analysis through the production cycle of gilthead sea bream and Atlantic salmon

et al. 2017

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Plant ingredients and processed animal proteins are alternative feedstuffs for fish feeds in aquaculture. However, their use can introduce contaminants like pesticides that are not previously associated with marine Atlantic salmon and gilthead sea bream farming. This study covers the screening of around 800 pesticides by gas chromatography (GC) and liquid chromatography (LC) coupled to high resolution time-of-flight mass spectrometry in matrices throughout the entire marine food production chain. Prior to analysis of real-world samples, the screening methodology was validated for 252 pesticides to establish the screening detection limit. This was 0.01 mg kg for 113 pesticides (45%), 0.05 mg kg for 73 pesticides (29%) and >0.05 mg kg for 66 pesticides (26%). After that, a quantitative methodology based on GC coupled to tandem mass spectrometry with atmospheric pressure chemical ionization source (GC-APCI-MS/MS) was optimized for the pesticides found in the screening. Although several polar pesticides, of which pirimiphos methyl and chlorpyriphos-methyl were most dominant, were found in plant material and feeds based on these ingredients, none of them were observed in fillets of Atlantic salmon and gilthead sea bream fed on these feeds.

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“…The reasons for this are unclear but are unlikely to be due to spray date, given the apparent detrimental effects of phosalone and pirimicarb. Pirimiphos-methyl has a residual effect that may last for up to eight months on maize (White et al, 1997). As T. pyri is a leaf-dwelling predator, compared to A. baccarum which disperses more actively over the branches and foliage of trees (Cuthbertson, 2004;Cuthbertson and Murchie, 2004a), it would presumably have more contact with spray deposits.…”

Section: Discussionmentioning

confidence: 99%

Environmental impact of an orchard winter wash and early season pesticide applications on both a beneficial and a pest mite species in Bramley apple orchards

Cuthbertson¹,

Murchie

2006

Int. J. Environ. Sci. Technol.

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ABSTRACT:Apple orchards often receive winter-washes to help aid invertebrate pest control. These can have detrimental environmental consequences. The application of winter-wash increased Aculus schlechtendali numbers while a decrease in numbers of the beneficial mite Anystis baccarum was observed. The application of early season pesticide treatments produced mixed results in relation to A. schlechtendali. Pirimiphos-methyl had no apparent detrimental effect on A. baccarum, whereas pirimicarb and phosalone reduced A. baccarum populations. The potential to incorporate an orchard winter-wash and early-season pesticide applications within integrated pest management strategies is discussed.

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Degradation and biological impact of chlorpyrifos-methyl on stored wheat and pirimiphos-methyl on stored maize in western Canada

Cited by 11 publications

References 13 publications

Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains

Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains

Comprehensive strategy for pesticide residue analysis through the production cycle of gilthead sea bream and Atlantic salmon

Environmental impact of an orchard winter wash and early season pesticide applications on both a beneficial and a pest mite species in Bramley apple orchards

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