Biochemical mechanisms conferring cross-resistance between tebufenozide and abamectin in Plutella xylostella

Lu, Qian; Cao, Guangchun; Song, Junxian; Yin, Qinyan; Han, Zhaojun

doi:10.1016/j.pestbp.2008.03.011

Cited by 85 publications

(56 citation statements)

References 26 publications

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“…Currently, the resistant mechanisms of the two resistant strains are not completely understood. Enhancement of cytochrome P450 monooxygenase activity was reported recently as one mechanism of resistance against both insecticides in DBM (Qian et al 2008). This may contribute to the reduction of sex pheromone titers in resistant females, as a metabolic resistance mechanism often is thought to reduce the overall fitness of insects (Roush and McKenzie 1987).…”

Section: Discussionmentioning

confidence: 93%

“…Abamectin is a bacterial (Streptomyces avermitilis) based toxin that acts on the GABA receptor/ chloride ionophore complex and glutamate-gated chloride channel (Clark et al 1995;Rugg et al 2005). Resistance of DBM to Tebufenozide has been reported in laboratory selected strains, and to Abamectin in field populations (Cao and Han 2006;Qian et al 2008). In this study, we report the differences in the DBM sex pheromone communication system associated with Tebufenozide and Abamectin resistance, and a pronounced non-random mating between resistant and susceptible strains.…”

Section: Introductionmentioning

confidence: 82%

“…Such similar changes in male response (both in blend ratio and sensitivity) of the two resistant strains may be due to similar insecticide resistant mechanisms, although the two insecticides used for selection have different modes of action. For example, enhancement of cytochrome P450 monooxygenase activity was reported recently as one mechanism of resistance against Abamectin and Tebufenozide in DBM (Qian et al 2008).…”

Section: Discussionmentioning

confidence: 98%

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Changes of Sex Pheromone Communication Systems Associated with Tebufenozide and Abamectin Resistance in Diamondback Moth, Plutella xylostella (L.)

2010

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Many insect pests have evolved resistance to insecticides. Along with this evolution, the sex pheromone communication system of insects also may change, and subsequently reproductive isolation may occur between resistant and susceptible populations. In this study of the diamondback moth, we found that resistant females (especially Abamectin resistant females) produced less sex pheromone and displayed a lower level of calling behavior. Resistant males showed higher EAG responsiveness to the sex pheromone mixture of females, and responded to a broader range of ratios between the two major components compared to the responses of susceptible moths. In addition, wind tunnel experiments indicated that changes associated with insecticide resistance in the Abamectin resistant strain (Aba-R) significantly reduced female attractiveness to susceptible males. Furthermore, mating choice experiments confirmed that non-random mating occurred between the two different strains. Aba-R females with an abnormal pheromone production and blend ratio exhibited significantly lower mating percentages with males from either their own strain or other strains, which corroborates the results obtained by the wind tunnel experiments. The implications of this non-random mating for insect speciation and insecticide resistance management are discussed.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 98%

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Changes of Sex Pheromone Communication Systems Associated with Tebufenozide and Abamectin Resistance in Diamondback Moth, Plutella xylostella (L.)

2010

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“…Nevertheless, cross-resistance is still possible between these two classes of insecticides as reported by Cao & Han (2006). Selection of P. xylostella for resistance to tebufenozide, an insect growth regulator, led to abamectin resistance associated with enhanced mixed-function oxidases (MFOs) (Qian et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Insecticide resistance in populations of the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), from the state of Pernambuco, Brazil

Vc¹,

Siqueira²,

Je³

et al. 2011

Neotrop. entomol.

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The diamondback moth Plutella xylostella (L.) has a great economic importance in Brassicaceae crops in many parts of the world. Recurrent infestations of this pest in growing areas of Pernambuco state, Brazil, have led farmers to frequently spray their crops with insecticides. However, control failures by several insecticides have been alleged by farmers. The objective of this study was to check whether resistance to insecticides could explain these control failures in P. xylostella. Populations of P. xylostella from Pernambuco were collected between January and April 2009. The resistance ratios of P. xylostella populations were compared among ive different active ingredients: abamectin, methomyl, lufenuron, indoxacarb, and diafenthiuron by leaf dipping bioassays using foliar discs of kale leaves. Mortality data were submitted to probit analysis. The P. xylostella populations showed variable response and signi icant resistance to one or more insecticides. The population from Bezerros County exhibited the highest resistance ratios to indoxacarb (25.3 times), abamectin (61.7 times), and lufenuron (705.2 times), when compared to the reference population. The populations from Bonito and Jupi Counties were 33.0 and 12.0 times more resistant to lufenuron and abamectin, respectively, when compared with the reference population. Resistance to methomyl was the least common, but not less important, in at least four populations. These results indicated that control failures were associated with resistance by some of the evaluated insecticides, reinforcing the need for resistance management in areas of the state of Pernambuco.

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“…This explains the large use of insecticides in crucifer production. Owing to its polyvoltine characteristics and serious overlap of generations, this pest can easily develop resistance to various kinds of insecticides [17][18][19], including biological one such as Bacillus thuringiensis [20][21][22], and particularly in sub-tropical and tropical countries [23]. To overcome resistance, farmers resort to increasing frequency and rates of pesticide applications and to mixed cocktails of pesticides [16].…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Cymbopogon Schoenanthus L. Spreng (Poaceae) Extracts on Diamondback Moth Damaging Cabbage

Adjrah¹

2012

J Biofertil Biopestici

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This study aims to examine the insecticidal properties of the aerial part of Cymbopogon schoenanthus. Cabbage plants were sprayed with the aqueous extracts of C. schoenanthus leaves as treatment, and the damage levels of Plutella xylostella was assessed. In vitro, the emulsified essential oil concentrations were used in a contact test on the larvae in order to assess the mortality effects. The larvae survival time was only 22 seconds with C. schoenanthus emulsified oil treatment (2 g/l), whilst it exceeded 44,100 seconds (over 12 hours) for the dimethoate. The nutrition test showed that at 48 h period, a significant effectiveness against larvae was observed with emulsified oil treatment 2 g/l (60% mortality) versus 10% of mortality for dimethoate. Cymbopogon schoenanthus can validly be used as alternative in P. xylostella management. The results of the field experiments showed no significant difference between the treatments and the control in terms of marketable cabbages harvested.

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Biochemical mechanisms conferring cross-resistance between tebufenozide and abamectin in Plutella xylostella

Cited by 85 publications

References 26 publications

Changes of Sex Pheromone Communication Systems Associated with Tebufenozide and Abamectin Resistance in Diamondback Moth, Plutella xylostella (L.)

Changes of Sex Pheromone Communication Systems Associated with Tebufenozide and Abamectin Resistance in Diamondback Moth, Plutella xylostella (L.)

Insecticide resistance in populations of the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), from the state of Pernambuco, Brazil

Efficacy of Cymbopogon Schoenanthus L. Spreng (Poaceae) Extracts on Diamondback Moth Damaging Cabbage

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