Toxicity and Synergism of Insecticides Against Susceptible and Pyrethroid-Resistant Third Instars of the Tobacco Budworm (Lepidoptera: Noctuidae)

Campanhola, Clayton; Plapp, Frederick W.

doi:10.1093/jee/82.6.1495

Cited by 19 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, it is worth noting that while pyrethroid resistance in the Australian H. armigera (33-fold) is at similar levels to that observed in Thailand populations (51-fold; Ahmad & McCaffery, 1988), these values are substantially lower than those reported from Indian populations (287-fold;McCaffery et al, 1989) and in pyrethroid resistant populations of the closely related Heliothis virescens (1000-fold; Campanhola & Plapp, 1989). Thus, caution should be used when extrapolating from studies of the evolution and management of pyrethroid resistance in Australian H. armigera to other instances of pyrethroid resistance in heliothine pest species.…”

Section: Monitoring For Resistancementioning

confidence: 59%

Inheritance of metabolic resistance to the synthetic pyrethroids in Australian Helicoverpa armigera(Lepidoptera: Noctuidae)

Daly

Fisk

1992

Bull. Entomol. Res.

View full text Add to dashboard Cite

Two strains of Helicoverpa armigera (Hiibner), resistant to synthetic pyrethroids, were isolated from field populations collected in the irrigated cotton growing areas of northern New South Wales: an isofemale strain, Mfo, and a composite field strain, Field. A series of crosses were undertaken between the Mfo and susceptible strains to determine the genetic basis of the resistance. Dose-responses were obtained by bioassay using topical application of fenvalerate in acetone. Considerable variation in tolerance was observed in both resistant and susceptible strains. In the Mfo strain, the major shift in resistance phenotype (33-fold resistance) was due to a single major gene with incomplete dominance. The resistance phenotype was not diluted by 23 generations of backcrossing. The major resistance phenotype could be eliminated almost completely by the addition of piperonyl butoxide which affects oxidative breakdown of the pyrethroids by mixed function oxidase (mfo) enzymes. Similar results were observed in the Field strain. Monitoring for resistance in field populations will be imprecise because a true discriminating dose does not exist for susceptible and heterozygous resistant individuals.

show abstract

Section: Monitoring For Resistancementioning

confidence: 59%

Inheritance of metabolic resistance to the synthetic pyrethroids in Australian Helicoverpa armigera(Lepidoptera: Noctuidae)

Daly

Fisk

1992

Bull. Entomol. Res.

View full text Add to dashboard Cite

show abstract

“…This could be due to the intensive selection pressure of H. armigera in China with fenvalerate which has channelled the development of resistance to alpha‐cyanophenoxybenzyl pyrethroids. The lower resistance to non‐cyano phenoxybenzyl pyrethroids was also found in pyrethroid‐resistant P. xylostella 38, 39 and Tribolium castaneum Hbst 40…”

Section: Discussionmentioning

confidence: 79%

Efficacy of various pyrethroid structures against a highly metabolically resistant isogenic strain of Helicoverpa armigera (Lepidoptera: Noctuidae) from China

Tan

McCaffery

2007

Pest Management Science

View full text Add to dashboard Cite

show abstract

“…Also, laboratory assays have shown that chlorfenapyr is very potent against pyrethroid‐resistant strains of H. virescens 5. The origin of resistance in this strain was identified as both altered target site and metabolic 20. Pimprale et al 21 concluded, after investigating the inheritance of chlorfenapyr susceptibility in pyrethroid‐susceptible and resistant H. virescens , that one genetic factor controls both cypermethrin resistance and chlorfenapyr susceptibility.…”

Section: Discussionmentioning

confidence: 99%

Biochemical analysis of a chlorfenapyr‐selected resistant strain of Tetranychus urticae Koch

Leeuwen

Pottelberge

Tirry

2006

Pest Management Science

View full text Add to dashboard Cite

Tetranychus urticae Koch has recently developed resistance to chlorfenapyr in Australia and Japan, but no attempt has yet been made to describe the biochemical mechanisms involved in chlorfenapyr resistance. In this study a laboratory-selected chlorfenapyr-resistant strain was investigated. Resistance to chlorfenapyr was associated with a strong increase in esterase activity and P450 mono-oxygenase (MO) activity but a decrease in 3,3',5,5'-tetramethylbenzidine (TMBZ) peroxidation activity. Differences in esterase activities between susceptible and resistant strains increased with increasing carbon number of the aliphatic side-chain of the nitrophenol substrate. A 4.4-fold increase in the O-deethylation of 7-ethoxy-4-trifluoromethyl coumarin (7-EFC) mediated by P450 MOs was detected. Remarkably, the resistant strain showed only half of the total TMBZ peroxidation activity found in the susceptible strain. The activity of these enzymes was further determined on different crosses and back-crosses of both strains. Results indicated that activities correlated with chlorfenapyr susceptibility and could be considered as biochemical markers. Esterase isozymes of both strains and their crosses were separated with isoelectric focusing (IEF) and visualised after activity staining. It was clear that two distinct zones of enhanced esterase activity were present in the chlorfenapyr-resistant strain (EST 11, pI = 4.88 and EST 16, pI = 4.71). EST 11 was identified with inhibitors as a carboxylesterase. The relative presence and intensity of these esterase zones changed in the different crosses and could be seen as a marker for chlorfenapyr resistance. Glutathione-S-transferase and glucose-6-phosphate dehydrogenase activities were not significantly different between strains. A twofold decrease in TMBZ peroxidase activity in the resistant strain could reflect decreased activation of chlorfenapyr. On the basis of these results the involvement of P450 MOs and esterases in the activation and detoxification of chlorfenapyr in T. urticae is challenged and discussed.

show abstract

Toxicity and Synergism of Insecticides Against Susceptible and Pyrethroid-Resistant Third Instars of the Tobacco Budworm (Lepidoptera: Noctuidae)

Abstract: Thírd-instar tobacco budworms, Heliothis tnrescens OI' resistant to were tested exposure to residues af in scintil-lati

Cited by 19 publications

References 0 publications

Inheritance of metabolic resistance to the synthetic pyrethroids in Australian Helicoverpa armigera(Lepidoptera: Noctuidae)

Inheritance of metabolic resistance to the synthetic pyrethroids in Australian Helicoverpa armigera(Lepidoptera: Noctuidae)

Efficacy of various pyrethroid structures against a highly metabolically resistant isogenic strain of Helicoverpa armigera (Lepidoptera: Noctuidae) from China

Biochemical analysis of a chlorfenapyr‐selected resistant strain of Tetranychus urticae Koch

Contact Info

Product

Resources

About