Effects of Deltamethrin on Glucose Catabolic Pathways in the Isolated Fat Body of Adult Male Locusta migratoria

Alaoui, Abdelilah Lamrani; Moreau, Robert A.; Gourdoux, L.

doi:10.1016/s0742-8413(96)00143-0

Cited by 4 publications

(7 citation statements)

References 12 publications

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“…(2003). The involvement of carbohydrate reserves in the detoxification of insecticide molecules has also been reported by Nath (2000, 2002) and Alaoui et al . (1994, 1997).…”

Section: Discussionsupporting

confidence: 69%

“…The fat body also acts in the intermediary metabolism in insects storing enzymes involved in the detoxification of toxic molecules, which may also occur in the insecticide resistant-populations from Jacarezinho and Juiz de Fora, as observed in Spodoptera frugiperda by Yu et al (2003). The involvement of carbohydrate reserves in the detoxification of insecticide molecules has also been reported by Nath (2000Nath ( , 2002 and Alaoui et al (1994Alaoui et al ( , 1997. Insecticide target site modifications leading to insecticide resistance may disrupt the pathways within which their targets (or receptors) are involved (Coustau et al, 2000).…”

Section: Discussionmentioning

confidence: 75%

“…If no suitable increment of energy metabolism takes place, energy reallocation may divert energy from other physiological processes involved with insect development, maintenance and reproduction (Hostetler et al ., 1994; Chown & Gaston, 1999; Harak et al ., 1999). The insecticide itself may also interfere with the storage of carbohydrates and proteins in the fat body and their mobilization in insects (Orr & Downer, 1982; Alaoui et al ., 1994, 1997; Nath et al ., 1997; Nath, 2000, 2002). However, these studies have yet to be comparatively carried out in insecticide‐resistant and ‐susceptible populations.…”

Section: Introductionmentioning

confidence: 99%

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Cost and mitigation of insecticide resistance in the maize weevil, Sitophilus zeamais

Guedes¹,

Oliveira²,

Guedes³

et al. 2005

Physiological Entomology

147

121

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Abstract. A common assumption in models of insecticide resistance evolution is the association between resistance and fitness costs in the absence of insecticides. There is empirical evidence of such associations, but their physiological basis (and mitigation) is little investigated. Pyrethroid-resistant populations of the maize weevil Sitophilus zeamais (Coleoptera: Curculionidae) offer this opportunity. Pyrethroid resistance in this species was initially observed in five Brazilian states by 1995, but the phenomenon apparently decreased and did not spread to other regions, probably due to the occurrence of a fitness disadvantage in resistant individuals in the absence of insecticides. The present investigation aims to verify whether differences in respiration rate and fat body morphology are related to differences in rate of development in Brazilian populations of S. zeamais resistant to insecticides, and thereby provide evidence for the existence (or not) of a physiological fitness cost acting against insecticide resistance in maize weevils. This may occur due to a possible energy trade-off between insecticide resistance and other physiological processes associated with development and reproduction. To achieve this, studies of the rate of development, respiration and fat body cytomorphology are carried out in one insecticide-susceptible (from Sete Lagoas) and two resistant populations (from Jacarezinho and Juiz de Fora) of S. zeamais. The resistant population from Jacarezinho shows that higher body mass is associated with higher energy reserves (larger trophocyte area) for development and reproduction, as well as for insecticide resistance. However, the resistant population from Juiz de Fora does not appear to have large enough energy allocation for insecticide-resistance expression and development and/or reproductive performance, suggesting a tradeoff between resistance and other life history traits.

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“…(2003). The involvement of carbohydrate reserves in the detoxification of insecticide molecules has also been reported by Nath (2000, 2002) and Alaoui et al . (1994, 1997).…”

Section: Discussionsupporting

confidence: 69%

Section: Discussionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cost and mitigation of insecticide resistance in the maize weevil, Sitophilus zeamais

Guedes¹,

Oliveira²,

Guedes³

et al. 2005

Physiological Entomology

147

121

View full text Add to dashboard Cite

show abstract

“…Insect homeostasis is maintained through proper diet and subsequent digestion and mobilization of carbohydrates, lipids and proteins, in addition to gas exchange. Insecticide exposure may impose changes to allow insect survival leading to altered patterns of digestion, energy metabolism and respiration rate (Orr & Downer, ; Hostetler et al ., ; Alaoui et al ., , ; Nath et al ., ; Harak et al ., ; Nath, , ; Ge et al ., ; Guedes et al ., ; Oliveira et al ., ; Araújo et al ., b; Silva et al ., ,b). Variation in such traits were observed among the key pest of stored maize in the neotropical region – the maize weevil Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) (Guedes et al ., ; Oliveira et al ., ; Araújo et al ., ,b; Silva et al ., ,b; Lopes et al ., ), but their possible induction in different strains of this species has not yet been investigated and is the objective of the present study.…”

Section: Introductionmentioning

confidence: 99%

Does cypermethrin affect enzyme activity, respiration rate and walking behavior of the maize weevil (Sitophilus zeamais)?

Veloso¹,

Pereira²,

Guedes³

et al. 2012

Insect Science

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Insecticides cause a range of sub-lethal effects on targeted insects, which are frequently detrimental to them. However, targeted insects are able to cope with insecticides within sub-lethal ranges, which vary with their susceptibility. Here we assessed the response of three strains of the maize weevil Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) to sub-lethal exposure to the pyrethoid insecticide cypermethrin. We expected enzyme induction associated with cypermethrin resistance since it would aid the resistant insects in surviving such exposure. Lower respiration rate and lower activity were also expected in insecticide-resistant insects since these traits are also likely to favor survivorship under insecticide exposure. Curiously though, cypermethrin did not affect activity of digestive and energy metabolism enzymes, and even reduced the activity of some enzymes (particularly for cellulase and cysteine-proteinase activity in this case). There was strain variation in response, which may be (partially) related to insecticide resistance in some strains. Sub-lethal exposure to cypermethrin depressed proteolytic and mainly cellulolytic activity in the exposed insects, which is likely to impair their fitness. However, such exposure did not affect respiration rate and walking behavior of the insects (except for the susceptible strain where walking activity was reduced). Walking activity varies with strain and may minimize insecticide exposure, which should be a concern, particularly if associated with (physiological) insecticide resistance.

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“…The fat body also acts in the intermediary metabolism in insects, storing enzymes involved in the detoxification of toxic molecules (Guedes, Oliveira, Guedes, Ribeiro, & Serrão, 2006). Moreover, the involvement of protein and carbohydrates reserves in the detoxification of insecticides molecules has been reported by Nath (), Alaoui, Gourdoux, Atay, and Moreau (1994), Alaoui, Moreau, and Gourdoux (1997) and van de Baan and Croft (1991). So, in addition to more detoxification enzyme activity, more energy reserves in winter forms of C. permixta are effective in insecticide tolerance as well.…”

Section: Discussionmentioning

confidence: 96%

Seasonal variation in susceptibility of the pear psyllid, Cacopsylla permixta (Hemiptera: Psyllidae) to selected insecticides

Esmaeily

Talebi

Hosseininaveh

et al. 2019

J Applied Entomology

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Although Cacopsylla pyri Forster and Cacopsylla pyricola Linnaeus have long been considered as more significant pests of pear trees around the world, Cacopsylla permixta Burckhardt and Hodkinson is the most significant pest in some parts of Iran, especially in pear gardens of Karaj. Current control strategies against this pest in Iran generally involve five or six insecticide treatments each year, despite unsatisfactory results are reported at many localities. So, it is crucial to know the most susceptible generation of the pest to apply a good strategy for its control. The aim of this study was to explore the seasonal variation in susceptibility of C. permixta to four commonly used insecticides. The results showed that winter forms (February) were 2.71‐fold, 4.58‐fold, 3.26 fold and 3.38‐fold more tolerant to diazinon, imidacloprid, acetamiprid and abamectin, respectively, compared with summer forms. Also, Esterase, GST and P450 monooxygenase activity was highest during February. Moreover, the content of lipid, carbohydrate, glycogen and protein was significantly higher in February compared with other months. Based on these results, the best period for insecticide treatment for efficient control is treatment against the first generation, at the time when eggs are laid by females as well as during the egg hatching and the larvae appearance. At this time of year, psylla are more susceptible, which would likely lead to better results and the reduction in damage during the next summer. However, further studies are needed to test this in farm settings, and to whether this holds true for other psylla species.

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Effects of Deltamethrin on Glucose Catabolic Pathways in the Isolated Fat Body of Adult Male Locusta migratoria

Cited by 4 publications

References 12 publications

Cost and mitigation of insecticide resistance in the maize weevil, Sitophilus zeamais

Cost and mitigation of insecticide resistance in the maize weevil, Sitophilus zeamais

Does cypermethrin affect enzyme activity, respiration rate and walking behavior of the maize weevil (Sitophilus zeamais)?

Seasonal variation in susceptibility of the pear psyllid, Cacopsylla permixta (Hemiptera: Psyllidae) to selected insecticides

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