Loss of fenitrothion on grains in storage

Desmarchelier, James M.

doi:10.1002/ps.2780090107

Cited by 31 publications

(9 citation statements)

References 15 publications

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“…These field trials were characterised by large seasonal changes in grain temperature, although grain moisture was stable. A number of protectants break down faster at higher temperature 14–17. Based on the current study, spinosad has a half‐life of 1 year at 30 °C and 55 and 70% RH.…”

Section: Discussionmentioning

confidence: 66%

“…Residue levels declined during storage, but there was no effect of relative humidity on the rate of residue breakdown. In this respect, spinosad differs from a number of other protectants, especially organophosphorus compounds, for which residue breakdown increases with increasing moisture 14–17. Spinosad residues were estimated to have declined by 30% during 9 months of storage.…”

Section: Discussionmentioning

confidence: 99%

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Long‐term persistence and efficacy of spinosad against Rhyzopertha dominica (Coleoptera: Bostrychidae) in wheat

Daglish¹,

Nayak²

2005

Pest Management Science

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A laboratory study was undertaken to determine the persistence and efficacy of spinosad against Rhyzopertha dominica (F.) in wheat stored for 9 months at 30 degrees C and 55 and 70% relative humidity. The aim was to investigate the potential of spinosad for protecting wheat from R. dominica during long-term storage in warm climates. Wheat was treated with spinosad at 0.1, 0.5 and 1 mg kg(-1) grain and sampled after 0, 1.5, 3, 4.5, 6, 7.5 and 9 months of storage for bioassays and residue analyses. Residues were estimated to have declined by 30% during 9 months of storage at 30 degrees C and there was no effect of relative humidity. Spinosad applied at 0.5 or 1 mg kg(-1) was completely effective for 9 months, with 100% adult mortality after 14 days of exposure and no live F1 adults produced. Adult mortality was <100% in some samples of wheat treated with 0.1 mg kg(-1) of spinosad, and live progeny were produced in all samples treated at this level. The results show that spinosad is likely to be an effective grain protectant against R. dominica in wheat stored in warm climates.

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Section: Discussionmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Long‐term persistence and efficacy of spinosad against Rhyzopertha dominica (Coleoptera: Bostrychidae) in wheat

Daglish¹,

Nayak²

2005

Pest Management Science

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“…Probably the most commonly used model is the following equation, where R t is the residue at time t, R 0 is the residue at time zero, and K is the rate constant (43,44).…”

Section: Resultsmentioning

confidence: 99%

Behavior of Myclobutanil, Propiconazole, and Nuarimol Residues during Lager Beer Brewing

Navarro

Pérez

Vela

et al. 2005

J. Agric. Food Chem.

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Over a 4 month brewing process, the fate of three fungicides, myclobutanil, propiconazole, and nuarimol, was studied in the spent grain, brewer wort, and final beer product. Only the residual level of myclobutanil after the mashing step was higher than its maximum residue limit (MRL) on barley. A substantial fraction was removed with the spent grain in all cases (26-42%). The half-life times obtained for the fungicides during storage of the spent grains ranged from 82 to 187 days. No significant influence of the boiling stage on the decrease of the fungicide residues was demonstrated. During fermentation, the content reduction varied from 20 to 47%. After the lagering and filtration steps, no significant decrease (<10%) was observed in any of the residues. Finally, during storage of the beer (3 months), the amounts of fungicides fell by 25-50% of their respective concentrations in the finished beer.

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“…Probably the most commonly used model to describe the loss of grain protectants is the following equation (Desmarchelier 1977(Desmarchelier , 1978:…”

Section: Loss Of Pesticide Residues From Stored Maltmentioning

confidence: 99%