Susceptibility of boll weevil to ready-to-use insecticide mixtures

Barros, Eduardo M.; Rodrigues, Agna Rita dos Santos; Batista, Felipe Colares; Machado, Anderson Vinnicius de Arruda; Torres, Jorge B.

doi:10.1590/1808-1657001232018

Cited by 9 publications

(6 citation statements)

References 41 publications

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“…However, a 5 ng/mL chlorfenapyr mixture and 500 ng/mL cypermethrin gave a slight synergistic effect when tested on cypermethrin-resistant mosquitoes [ 48 ]. Lambda-cyhalothrin with chlorantraniliprole resulted in a synergic effect against boll weevil adults [ 56 ].…”

Section: Discussionmentioning

confidence: 99%

The Binary Mixtures of Lambda-Cyhalothrin, Chlorfenapyr, and Abamectin, against the House Fly Larvae, Musca domestica L.

et al. 2022

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The house fly Musca domestica L. is one of the medical and veterinary pests that can develop resistance to different insecticides. Mixing insecticides is a new strategy for accelerating pest control; furthermore, it can overcome insect resistance to insecticides. This study aims to evaluate three insecticides, chlorfenapyr, abamectin, and lambda-cyhalothrin, individually and their binary mixtures against 2nd instar larvae of M. domestica laboratory strain. Chlorfenapyr exhibited the most toxic effect on larvae, followed by abamectin then the lambda-cyhalothrin. The half-lethal concentrations (LC50) values were 3.65, 30.6, and 94.89 ppm, respectively. These results revealed that the high potentiation effect was the mixture of abamectin/chlorfenapyr in all the mixing ratios. In contrast, the tested combination of lambda-cyhalothrin/abamectin showed an antagonism effect at all mixing ratios against house fly larvae. The total protein, esterases, glutathione-S-transferase (GST), and cytochrome P-450 activity were also measured in the current investigation in the larvae treated with chlorfenapyr. Our results indicate that GST may play a role in detoxifying chlorfenapyr in M. domestica larvae. The highest activity of glutathione-S-transferase was achieved in treated larvae with chlorfenapyr, and an increase in cytochrome P-450 activity in the larvae was observed post-treatment with Abamectin/chlorfenapyr.

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Section: Discussionmentioning

confidence: 99%

The Binary Mixtures of Lambda-Cyhalothrin, Chlorfenapyr, and Abamectin, against the House Fly Larvae, Musca domestica L.

et al. 2022

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“…Clair et al 2020;Alsay & Ay 2022). Rex Consortium (2013) and Barros et al (2019) stated that mixture pesticide formulations prevent or delay the development of resistance in pest species.…”

Section: Introductionmentioning

confidence: 99%

The roles of the biochemical and molecular changes in resistance of Tetranychus urticae populations selected with spiromesifen+abamectin mixture </p >

Ay,

Çevik,

Alsay

2024

saa

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The physiological changes in Tetranychus urticae selected with spiromesifen+abamectin (S+A) mixture formulation were demonstrated by biochemical and molecular methods. The susceptible (GSS) population of T. urticae, was selected with S+A and made resistant with increasing doses of the mixture formulation. The resistant population was divided into two, and selection pressure was terminated in one population which is named IR (Interrupt resistant). In the other population, the selection with S+A was continued and the population named IR2. Activities of some detoxification enzymes (esterase, glutathione-S-transferase (GST) and cytochrome P450) were investigated in the GSS and IR populations. The activity of esterase, GST and P450 enzymes were increased by 1.77, 2.57 and 2.58-fold, respectively, in the IR population compared to the GSS population. Also, investigation of synergistic effects with esterase inhibitor (TTP), GST inhibitor (DEM) and P450 inhibitor (PBO) in this population revealed that all three synergists showed significant synergistic effects in IR population. In molecular studies, when the population was screened for the presence of two previously identified glutamate channel mutations (G314D and G326E) by qPCR with TaqMan probes no mutations could be detected in glutamate channels. and the CTD domain of acetyl coenzyme-A carboxylase (ACCase). Furthermore, possible genetic mutations in the biotin carboxylase domain (BCD) and carboxyl transferase domain (CTD) of the ACCase target sites were determined by sequencing. Although a single amino acid mutation G37D in the BCD of the ACCase gene of the IR and IR2 populations was detected, its association with spiromesifen resistance was not confirmed. The results indicated that increased detoxification and possible target site mutation may be responsible for the S+A resistance in the IR and IR2 populations.

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“…Tank mixing is the preparation of agrochemicals and similar products in a tank or containers shortly before application. In aviation spray, it is more and more popular for farmers to mix a variety of pesticide formulations or leaf fertilizers to spray at the same time, which can reduce the frequency of application, reduce spraying loss, save labor costs, lead to lower soil compaction, meanwhile, improve prevention efficacy, and delay drug resistance. − Moreover, this practice was legislated in Brazil recently. However, because of the lack of training and available compatibility agent, the instability of the aviation pesticide tank mixture occurs from time to time, seriously affecting the effect of pesticide application .…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Stability and Effectivity of Multiple Pesticide Formulation Mixtures by Adding an Eco-Friendly Adjuvant

Zhang,

Bao,

et al. 2023

ACS Sustainable Chem. Eng.

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In recent years, aviation spray has been developed rapidly in plant protection, and it is common to mix pesticide formulations or fertilizers before spraying. However, serious instability of the pesticide tank mixture usually occurs in the process, resulting in loss of effect, drug damage, and even huge environmental pollution. However, this has not been studied further by researchers. Here, we evaluated the stability of the pesticide tank mixture by particle size, ζ potential, multiple light scattering, etc., and screened out the surfactants sodium dodecyl sulfate (SDS), sodium lauryl polyoxyethylene ether sulfate (AES), and natural polymer xanthan gum (XG) to stabilize the system. The results indicate that SDS and AES stabilize the pesticide tank mixture relying on the increase in the electrostatic repulsion of colloidal particles; XG stabilizes the system due to the increase in the steric hindrance. The results of multiple light scattering show that all 2.0 wt % SDS, 2.0 wt % AES, and 0.05 wt % XG decrease the stability index (SI) of the pesticide tank mixture from 1.44 to less than 0.71, which significantly improves the stability. Overall, our results demonstrate the feasibility of using XG as a safer, more cost-effective, and sustainable alternative to commercial synthetic compatibility agents.

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Susceptibility of boll weevil to ready-to-use insecticide mixtures

Cited by 9 publications

References 41 publications

The Binary Mixtures of Lambda-Cyhalothrin, Chlorfenapyr, and Abamectin, against the House Fly Larvae, Musca domestica L.

The Binary Mixtures of Lambda-Cyhalothrin, Chlorfenapyr, and Abamectin, against the House Fly Larvae, Musca domestica L.

The roles of the biochemical and molecular changes in resistance of Tetranychus urticae populations selected with spiromesifen+abamectin mixture </p >

Enhancing the Stability and Effectivity of Multiple Pesticide Formulation Mixtures by Adding an Eco-Friendly Adjuvant

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