Metabolic Resistance Mechanisms of Different Pesticides in The Two-Spotted Spider Mite, Tetranychus urticae Koch (Tetranychidae:Acari)
Negm, S., Saleh, A., Abd El-Hady, A., Bekheat, H., Abd El-Wahab, R. (2009). Metabolic Resistance Mechanisms of Different Pesticides in The Two-Spotted Spider Mite, Tetranychus urticae Koch (Tetranychidae:Acari). EKB Journal Management System, 3(1), 45-53. doi: 10.21608/ajesa.2009.4965
Salwa Negm; A. Saleh; A. Abd El-Hady; H. Bekheat; Rania Abd El-Wahab. "Metabolic Resistance Mechanisms of Different Pesticides in The Two-Spotted Spider Mite, Tetranychus urticae Koch (Tetranychidae:Acari)". EKB Journal Management System, 3, 1, 2009, 45-53. doi: 10.21608/ajesa.2009.4965
Negm, S., Saleh, A., Abd El-Hady, A., Bekheat, H., Abd El-Wahab, R. (2009). 'Metabolic Resistance Mechanisms of Different Pesticides in The Two-Spotted Spider Mite, Tetranychus urticae Koch (Tetranychidae:Acari)', EKB Journal Management System, 3(1), pp. 45-53. doi: 10.21608/ajesa.2009.4965
Negm, S., Saleh, A., Abd El-Hady, A., Bekheat, H., Abd El-Wahab, R. Metabolic Resistance Mechanisms of Different Pesticides in The Two-Spotted Spider Mite, Tetranychus urticae Koch (Tetranychidae:Acari). EKB Journal Management System, 2009; 3(1): 45-53. doi: 10.21608/ajesa.2009.4965

Metabolic Resistance Mechanisms of Different Pesticides in The Two-Spotted Spider Mite, Tetranychus urticae Koch (Tetranychidae:Acari)

Acarines: Journal of the Egyptian Society of Acarology
Article 8, Volume 3, Issue 1, January 2009, Page 45-53  XML PDF (175.68 K)
Document Type: Original research articles
DOI: 10.21608/ajesa.2009.4965
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Authors
Salwa Negm1; A. Saleh1; A. Abd El-Hady1; H. Bekheat2; Rania Abd El-Wahab2
1Pesticide Dept., Faculty of Agriculture ,Mansoura Univ.
2Plant Protection Research Institute,Dokki,Giza,
Abstract
An investigation was performed to determine the possible role of detoxification metabolism in resistant strains of
Tetranychus urticea Koch.Adult females were subjected to selection pressure through 40 generations by LC50's and
LC90's of Vertimec (Avermectines), Cypermethrin (Pyrethroids), Methomyl (Carbamates) and Malathion (O.P), were
(41.308, 42.021, 44.881, and 49.265 folds) and (49.815 ,55.411 ,63.972 ,and 90.00 folds), respectively, whereas RRS
slopes ranged from 0.884 to 1.395 folds. Comparative assay with esterases (EST) and mixed function oxidases(MFO)
showed that LC50's of Mal-Resistant strains had higher EST. activiy (4.71) with lower MFO activity (3.80),while
,LC50's of Vert-Rresistant strains had lower EST. activiy (2.70) with higher MFO activity (4.26). Synergist experiments
showed low synergism by S,S,S tributylphosphorotrithioate (DEF) of EST activiy ranged from 4.81 to 2.99 folds,while
synergism by Piperonyl Butoxide (PBO) of MFO activity ranged from 4.27 to 3.82folds to LC50's pesticides resistant
strains.
Keywords
Tetranychus urticae; resistance; Selection Pressure; Avermectines; Pyrthroids; Carbamates; OP's; Mixed Function Oxidases; Esterases; PBO; def
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