What question did this study set out to answer?

To determine the physicochemical causes of variable DDT toxicity in aqueous-acetone mosquito larvicide suspensions across different container types and volumes.

December 1, 1959Journal of Economic Entomology

Fate of DDT in Larvicide Suspensions

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Authors

MBM. C. BowmanUniversity of North Carolina Health Care FAFred AcreeAgricultural Research Service CSClaude H. SchmidtCentre National de la Recherche Scientifique

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Implication

Laboratory study demonstrates rapid container deposition and volatilization drive DDT loss in larvicide bioassays, highlighting major physicochemical artifacts in toxicity testing.

Key Points

To determine the physicochemical causes of variable DDT toxicity in aqueous-acetone mosquito larvicide suspensions across different container types and volumes.
Determined settling rates of aqueous-acetone DDT suspensions at concentrations of 1.0 p.p.m. and 0.01 p.p.m.
Quantified DDT deposition onto the inner surfaces of glass, aluminum, and paper containers following withdrawal of the liquid phase minutes after preparation.
Measured 24-hour DDT volatilization loss alongside liquid-phase evaporation in 0.01 p.p.m. suspensions.
Settling occurred at 1.0 p.p.m. DDT suspensions but was undetectable at the standard larvicide test concentration of 0.01 p.p.m.
A high proportion of DDT rapidly deposited onto the walls of glass, aluminum, and paper vessels within minutes, significantly reducing suspended concentrations.
More than 50% of DDT was lost from 0.01 p.p.m. suspensions via volatilization over a 24-hour testing period.

Cite This Study

Bowman et al. (1959) studied this question.

synapsesocial.com/papers/6a94665d18fa85d8c46e5299 https://doi.org/10.1093/jee/52.6.1038

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Implication

Laboratory study demonstrates rapid container deposition and volatilization drive DDT loss in larvicide bioassays, highlighting major physicochemical artifacts in toxicity testing.

Fate of DDT in Larvicide Suspensions

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Implication

Key Points

Cite This Study

Fate of DDT in Larvicide Suspensions

Discussion

Member takes

Implication

Key Points

Cite This Study

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