The toxicity of phosphine to adults of Tribolium castaneum (Herbst): Phosphine-induced narcosis

Winks, R.G.

doi:10.1016/0022-474x(85)90056-6

Cited by 36 publications

(13 citation statements)

References 11 publications

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“…In the doseÐmortality response experiments, we did not record any narcotic effects on the eggs, even at a concentration of 3.81 mg/liter, which differed from previous studies on larvae (Winks 1985, Rajendran et al 2000. It had been reported that disruption to the sympathetic nervous system, suppression of energy metabolism, and toxic changes to the redox state of the cell represent three major mechanisms of phosphine activity (Nath et al 2011).…”

Section: Discussioncontrasting

confidence: 82%

Toxicity of Phosphine Fumigation Against <I>Bactrocera tau</I> at Low Temperature

Liu

et al. 2014

j econ entomol

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Bactrocera tau (Walker) is one of the most harmful pests to fruits and vegetables. To counteract this pest, the development of phytosanitary treatment is required to comply with the pest regulation requirements of certain countries. This study investigated the toxicity of phosphine fumigation against B. tau under low temperature conditions. Different growth stages (eggs and instars) of B. tau were exposed to 1.07 mg/liter phosphine for 1-10 d at 5 degrees C, and compared with unfumigated flies at 5 degrees C. The results showed that tolerance to cold treatment alone or phosphine fumigation at low temperatures generally increased with the stage of insect development. However, eggs incubated for 12 h at 25 degrees C represented the most tolerant growth stage to phosphine fumigation at 5 degrees C. Furthermore, 8.56- to 2.18-d exposure periods were required to achieve 99% mortality with a range of phosphine concentrations from 0.46 to 3.81 mg/liter. C0.62 t = k expression was obtained from the LT99 values, indicating that the exposure time was more important than the phosphine concentration.

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Section: Discussioncontrasting

confidence: 82%

Toxicity of Phosphine Fumigation Against <I>Bactrocera tau</I> at Low Temperature

Liu

et al. 2014

j econ entomol

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“…The lack of information on the sublethal response of insect pest species to fumigants is even more acute, in spite of a few studies recognising its importance 8–10. Narcosis, for instance, is reported as an insect protective mechanism against phosphine that can lead to low fumigation efficacy 8, 9. In addition, psocids were reported to move away from products undergoing fumigation and are able to delay egg‐hatching under phosphine fumigation, compromising their control with this fumigant 10.…”

Section: Introductionmentioning

confidence: 99%

“…Phosphine is the main fumigant in use today against stored‐product insect pests not only because of its qualities (low cost, high potency, rapid air convection, easy use and low residue levels left on the treated commodity), but also because of the phasing‐out of methyl bromide owing to its ozone‐depleting characteristics 11–13. The worldwide use of phosphine and the ever‐increasing reports of phosphine‐resistant insects justify the concern about its efficacy,14–16 especially considering that it may be further compromised by the insect pest behaviour 8–10…”

Section: Introductionmentioning

confidence: 99%

Phosphine‐induced walking response of the lesser grain borer (Rhyzopertha dominica)

Pimentel

Faroni

Corrêa

et al. 2012

Pest Management Science

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Phosphine exposure decreased walking activity. Such reduced walking activity is likely to lower the respiration rate, thereby minimising phosphine uptake. As higher phosphine resistance was also associated with reduced walking activity, phosphine-resistant populations may resist phosphine fumigation even more efficiently on account of this behavioural trait, further aiding their physiological resistance, and should be a matter of concern.

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“…The Ct product for the constant concentration was much lower than the Ct product for the changing concentration. He speculated that narcosis, as described by Winks (1984Winks ( , 1985, might render high concentrations less effective than expected.…”

Section: Introduction -mentioning

confidence: 99%

Prospects for predicting insect mortality in relation to changing phosphine concentrations.

Daglish¹,

Collins²,

Pavic³

2003

Advances in Stored Product Protection. Proceedings of the 8th International Working Conference on Stored Product Protection, Yo

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Typically, in bag-stack or silo fumigations the concentration of phosphine is not constant, and yet most of what is known about phosphine efficacy against grain insects comes frorn studies with fixed concentrations. Indeed, where changing concentration experiments have been performed, researchers have been unable to explain observed efficacy on the basis of data frorn fixed concentrations. The ability to predict insect mortality in relation to changing phosphine concentrations would facilitate the development of effective fumigation protocols. In this paper, we explore the prospects for making such predictions. After reviewing published and new results, we conclude that the commonly used concentration x time (Ct) product is y e l iable for this purpose. New results, for a strongly resistant strain of Rhyzopertha dominica frorn Australia, suggest that the relationship Cnt = kmay be useful for predicting mortality of this type of insect in changing concentrations. However, in the case of a strain of Sitophilus oryzae with a type of resistance common in Australian S. oryzae, the relationship C t = k proved to be less reliable.

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The toxicity of phosphine to adults of Tribolium castaneum (Herbst): Phosphine-induced narcosis

Cited by 36 publications

References 11 publications

Toxicity of Phosphine Fumigation Against <I>Bactrocera tau</I> at Low Temperature

Toxicity of Phosphine Fumigation Against <I>Bactrocera tau</I> at Low Temperature

Phosphine‐induced walking response of the lesser grain borer (Rhyzopertha dominica)

Prospects for predicting insect mortality in relation to changing phosphine concentrations.

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