The cross-resistance patterns and biochemical characteristics of an imidacloprid-resistant strain of the cotton aphid

Abstract

The imidacloprid-resistant strain of Aphis gossypii (RF 60 ) was further selected with imidacloprid to establish the more resistant strain (RF 75 ). After the selection for 15 generations, the resistance ratio relative to the susceptible strain increased from 66.60 to 72.60. The RF 75 strain showed different levels of cross-resistance to all the insecticides tested. Synergistic and metabolic enzyme assays suggested that carboxylesterase and cytochrome P450 may play important roles in the imidacloprid resistance. © Pesticide Science Society of Japan

Comparative Modelling, Toxicological and Biochemical Studies of Imidacloprid and Thiamethoxam Insecticides on the House Fly, Musca domestica L. (Diptera: Muscidae)

“…THIA was highly toxic to house flies than IMI, and this agrees with Saeed et al (2017) who stated that THIA was more effective to the susceptible population of cotton leaf hopper, Amrasca devastans (Distant) than IMI. Although this result disagree with Chen et al (2015) who showed that IMI exhibited high toxicity to both RF75 and SS strains of Aphis gossypii than THIA. Additionally, the IMIresistant strain of A. gossypii at the 45 th generation did not develop cross-resistance to the second generation of neonicotinoid (THIA) Shi et al (2011).…”

Characterisation of imidacloprid resistance in the bird cherry‐oat aphid, Rhopalosiphum padi, a serious pest on wheat crops

“…19 Cytochrome P450-mediated imidacloprid resistance was reported in several insect species, including Aedes aegypti, 20 Musca domestica, 21,22 Bemisia tabaci, [23][24][25] N. lugens, [26][27][28][29] Laodelphax striatellus, 30 M. persicae, 12,31 and A. gossypii. 32 Single or multiple P450 genes were over-expressed in imidacloprid-resistant strains and/or populations of these insect species. Synergistic and metabolic enzyme assays in an IM-R strain of A. gossypii (RF75) suggested that cytochrome P450 may play important roles in imidacloprid resistance.…”

“…The metabolic mechanisms in insects against synthetic and natural xenobiotics include cytochrome P450 monooxygenases (cytochrome P450s), esterases [especially carboxylesterases (CarEs)], and glutathione S‐transferases (GSTs) . Cytochrome P450‐mediated imidacloprid resistance was reported in several insect species, including Aedes aegypti , Musca domestica , Bemisia tabaci , N. lugens , Laodelphax striatellus , M. persicae , and A. gossypii . Single or multiple P450 genes were over‐expressed in imidacloprid‐resistant strains and/or populations of these insect species.…”

Susceptibility of Culex pipiens L. in Sharkia Governorate, Egypt to Chitin Synthesis Inhibitors and their Biochemical Characterizations

“…General (α and β) esterases and carboxylesterase are major enzymes accountable for the metabolism or detoxification of toxins (Li et al, 2007). The increased detoxification activities of the enzymes could weaken the defense responses of house flies to insecticides (Chen et al, 2015). Treatment of Cx.…”