Temperature Relationships in Organophosphorus Poisoning in Boll Weevils12

Norment, B.R.; Chambeas, H. W.

doi:10.1093/jee/63.2.502

Cited by 30 publications

(10 citation statements)

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“…Both of the organophosphates tested in the present study showed temperature dependent toxicities, with chlorpyrifos being more toxic than profenofos at the highest temperature range (34°C) tested. Organophosphate insecticides usually have a positive association with surrounding temperatures, therefore, these could be assumed theoretically to perform well in high temperature conditions [17] .The results are in accordance with those reported on organophosphates but with different insect pests [20] , [25] , [26] . A probable reason for this increased toxicity could be increased penetration of the organophosphates into the body of house flies.…”

Section: Discussionsupporting

confidence: 87%

The Effect of Temperature on the Toxicity of Insecticides against Musca domestica L.: Implications for the Effective Management of Diarrhea

Khan

Akram

2014

PLoS ONE

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BackgroundDiarrhea is an important cause of childhood mortality in developing countries like Pakistan because of unhygienic conditions, lack of awareness, and unwise use of preventive measures. Mechanical transmission of diarrheal pathogens by house flies, Musca domestica, is believed as the most effective route of diarrhea transmission. Although the use of insecticides as a preventive measure is common worldwide for the management of house flies, success of the measure could be compromised by the prevailing environmental temperature since it significantly affects toxicity of insecticides and thus their efficacy. Peaks of the house fly density and diarrheal cases are usually coincided and season specific, yet little is known about the season specific use of insecticides.Methodology/Principal FindingsTo determine the temperature-toxicity relationship in house flies, the effect of post-bioassays temperature (range, 20–34°C) on the toxicity of seven insecticides from organophosphate (chlorpyrifos, profenofos), pyrethroid (cypermethrin, deltamethrin) and new chemical (emamectin benzoate, fipronil, spinosad) classes was evaluated by using a feeding bioassay method. From 20–34°C, the toxicities of chlorpyrifos, profenofos, emamectin and fipronil increased 2.10, 2.93, 2.40 and 3.82 fold (i.e. positive temperature coefficient), respectively. Whereas, the toxicities of cypermethrin, deltamethrin and spinosad decreased 2.21, 2.42 and 3.16 fold (i.e. negative temperature coefficient), respectively.Conclusion/SignificanceThese findings suggest that for the reduction in diarrheal cases, house flies should be controlled with insecticides according to the prevailing environmental temperature. Insecticides with a positive temperature coefficient may serve as potential candidates in controlling house flies and diarrhea epidemics in hot season and vice versa.

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Section: Discussionsupporting

confidence: 87%

The Effect of Temperature on the Toxicity of Insecticides against Musca domestica L.: Implications for the Effective Management of Diarrhea

Khan

Akram

2014

PLoS ONE

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“…7) Generally speaking, the toxicity of most organophosphate and carbamate insecticides is positively correlated with temperature, giving these insecticides a positive temperature coe cient. 8,9) However, DDT and pyrethroids have negative temperature coecients for some insects. [10][11][12][13][14] Other insecticides, such as lindane, have positive temperature coe cient for certain insects and negative temperature coe cients for others.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the toxicity of several insecticides to <i>Apolygus lucorum</i> (Heteroptera: Miridae)

Gao

Dang

et al. 2012

J. Pestic. Sci.

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“…A negative temperature coefficient of toxicity has been reported for DDT (Vinson and Kearns 1952), some carbamates (McKinlay and Martin 1967), pyrethrins (Blum and Kearns 1956), and pyrethroids (Harris and Kinoshita 1977;Sparks et al 1982;Sparks et al 1983). However, a positive temperature coefficient of toxicity is characteristic of organophosphate insecticides (Norment and Chambers 1970;Chalfant 1973).…”

Section: Introductionmentioning

confidence: 99%

THE INFLUENCE OF TEMPERATURE ON THE EFFICACY OF THREE PYRETHROID INSECTICIDES AGAINST THE GRASSHOPPER, MELANOPLUS SANGUINIPES (FAB.) (ORTHOPTERA: ACRIDIDAE), UNDER LABORATORY CONDITIONS

Hinks¹

1985

Can Entomol

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Three pyrethroids, deltamethrin, fenvalerate, and cyfluthrin, were assayed against 2nd-instar nymphs of the grasshopper Melanoplus sanguinipes (Fab.) at 5 dosages and at 5 post-treatment temperatures ranging from 15.6 to 37.8°C. All three showed a negative temperature coefficient of toxicity but there was considerable variation in the pattern of response. Deltamethrin proved to be the most effective and cyfluthrin the least effective, both in terms of the amount of active ingredient required for 90% mortality and in having the lowest negative coefficient, respectively. The extent of the negative temperature coefficient of toxicity was much more pronounced at the LD90 than the LD50. Apparent mortality was recorded at 24, 48, and 72 h post-treatment and with each of the pyrethroids, recovery of some hoppers took place after 24 h. This phenomenon of delayed recovery was greatest at the lower temperatures.

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Temperature Relationships in Organophosphorus Poisoning in Boll Weevils12

Cited by 30 publications

References 0 publications

The Effect of Temperature on the Toxicity of Insecticides against Musca domestica L.: Implications for the Effective Management of Diarrhea

The Effect of Temperature on the Toxicity of Insecticides against Musca domestica L.: Implications for the Effective Management of Diarrhea

Effect of temperature on the toxicity of several insecticides to <i>Apolygus lucorum</i> (Heteroptera: Miridae)

THE INFLUENCE OF TEMPERATURE ON THE EFFICACY OF THREE PYRETHROID INSECTICIDES AGAINST THE GRASSHOPPER, MELANOPLUS SANGUINIPES (FAB.) (ORTHOPTERA: ACRIDIDAE), UNDER LABORATORY CONDITIONS

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