Detrimental effects of pyriproxyfen on the detoxification and abilities of Belostoma anurum to prey upon Aedes aegypti larvae

Valbon, Wilson Rodrigues; Hatano, Eduardo; Oliveira, Nádylla Régis Xavier de; Ataíde, Álvaro D.; Corrêa, Maria Júlia M.; Gomes, Sabriny F.; Martins, Gustavo Ferreira; Haddi, Khalid; Alvarenga, Elson S.; Oliveira, Eugênio E.

doi:10.1016/j.envpol.2021.117130

Cited by 11 publications

(5 citation statements)

References 45 publications

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“…Some insecticides affect insect behavior, including probing, feeding, and oviposition [12], and prolong growth and development [36,37]. In our study, we found that exposure to acetamiprid and dinotefuran significantly prolonged the APOP and TPOP of C. pallens, which was consistent with a report stating that thiamethoxam treatment negatively affected the APOP and TPOP of Hippodamia variegata [38].…”

Section: Discussionsupporting

confidence: 92%

Evaluation of the Toxicity and Sublethal Effects of Acetamiprid and Dinotefuran on the Predator Chrysopa pallens (Rambur) (Neuroptera: Chrysopidae)

Ren

et al. 2022

Toxics

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Neonicotinoid insecticides affect the physiology or behavior of insects, posing risks to non-target organisms. In this study, the effects of sublethal doses of two neonicotinoid insecticides, acetamiprid and dinotefuran, against Chrysopa pallens (Rambur) (Neuroptera: Chrysopidae) were determined and compared. The results showed that acetamiprid and dinotefuran at LD10 (8.18 ng a.i. per insect and 9.36 ng a.i. per insect, respectively) and LD30 (16.84 ng a.i. per insect and 15.01 ng a.i. per insect, respectively) significantly prolonged the larval stages and pupal stages (except acetamiprid LD10), compared to control. In addition, acetamiprid and dinotefuran at LD30 significantly prolonged the adult preoviposition period (APOP) and total preoviposition period (TPOP). In contrast, the two insecticides at LD10 and LD30 had no significant effect on the longevity, fecundity, reproductive days, preadult survival rate (%), intrinsic rate of increase (r), net reproductive rate (R0), and finite rate of increase (λ). These results provide a theoretical basis for the rational use of these two insecticides and the utilization and protection of C. pallens.

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Section: Discussionsupporting

confidence: 92%

Evaluation of the Toxicity and Sublethal Effects of Acetamiprid and Dinotefuran on the Predator Chrysopa pallens (Rambur) (Neuroptera: Chrysopidae)

Ren

et al. 2022

Toxics

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“…Even though the rutin ligand did not dock inside the AeagOBP1 interior binding site because of its larger surface area, this molecule presented the best affinity energy, as well as interaction with amino acids closer to the receptor’s cavity, such as Arg23 and Ile125. This suggests that the principal role of the mechanism of action of rutin is repellency activity, as described in other insects [ 64 , 65 , 66 ].…”

Section: Discussionmentioning

confidence: 79%

Methanolic Extracts of Chiococca alba in Aedes aegypti Biorational Management: Larvicidal and Repellent Potential, and Selectivity against Non-Target Organisms

Borges

Haddi

Valbon

et al. 2022

Plants

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The use of formulations containing botanical products for controlling insects that vector human and animal diseases has increased in recent years. Plant extracts seem to offer fewer risks to the environment and to human health without reducing the application strategy’s efficacy when compared to synthetic and conventional insecticides and repellents. Here, we evaluated the potential of extracts obtained from caninana, Chiococca alba (L.) Hitchc. (Rubiaceae), plants as a tool to be integrated into the management of Aedes aegypti, one of the principal vectors for the transmission of arborviruses in humans. We assessed the larvicidal and repellence performance against adult mosquitoes and evaluated the potential undesired effects of the extracts on non-target organisms. We assessed the susceptibility and predatory abilities of the nymphs of Belostoma anurum, a naturally occurring mosquito larva predator, and evaluated the C. alba extract’s cytotoxic effects in mammalian cell lines. Our chromatographic analysis revealed 18 compounds, including rutin, naringin, myricetin, morin, and quercetin. The methanolic extracts of C. alba showed larvicidal (LC50 = 82 (72–94) mg/mL) activity without killing or affecting the abilities of B. anurum to prey upon mosquito larvae. Our in silico predictions revealed the molecular interactions between rutin and the AeagOBP1 receptor to be one possible mechanism for the repellent potential recorded for formulations containing C. alba extracts. Low cytotoxicity against mammalian cell lines reinforces the selectivity of C. alba extracts. Collectively, our findings highlight the potential of C. alba and one of its constituents (rutin) as alternative tools to be integrated into the management of A. aegypti mosquitoes.

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“…Firstly, given that the primary mode of action of pyriproxyfen is disrupting the insect endocrine system, maintaining the insect in an immature state until their death or reducing the number of emerged adults (Sullivan and Goh 2008; Ginjupalli and Baldwin 2013), it is reasonable to consider that the pyriproxyfen binding site receptors are more promptly available in the second instar mosquito larvae than backswimmer adults. Indeed, in a recent investigation we could show that low pyriproxyfen concentration (i.e., 2.5 µg a.i./L) reduced the survival and predatory abilities of nymphs of the water bug Belostoma anurum (Hemiptera: Belostomatidae), a naturally occurring mosquito control agent in the Neotropical region (Valbon et al 2019a(Valbon et al , 2021.…”

Section: Discussionmentioning

confidence: 98%

Predatory Abilities of The Backswimmer Buenoa Amnigenus Are Not Impaired After Sublethal Exposures To Pyriproxyfen

Valbon

Araújo

Nery

et al. 2021

Preprint

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Pyriproxyfen is a juvenile hormone analogue that is commonly used to control the immature stages of mosquitoes in both artificial and natural water reservoirs. Recently, concerns have been raised regarding the pyriproxyfen community effectiveness in preventing vector-transmitted diseases. Such concerns have been based on the unintended effects on non-target organisms and selection of resistant mosquito populations. Thus, this investigation was conducted aiming to evaluate the toxicity of pyriproxyfen to Aedes aegypti (Diptera: Culicidae) larvae and the backswimmer Buenoa amnigenus (Hemiptera: Notonectidae), a naturally occurring mosquito larvae predator. We also assessed the abilities of backswimmers exposed to sublethal levels of pyriproxyfen to prey upon mosquito larvae (L2) under three larval densities (3, 6, or 9 larvae/100 mL of water) using artificial containers. Our results revealed that pyriproxyfen killed backswimmers only at concentrations higher than 100 mg active ingredient [a.i.]/L, which is 10 times higher than that recommended for larvicidal field application (i.e, 10 mg a.i./L). Interestingly, the abilities of backswimmers exposed to sublethal levels of pyriproxyfen (100 mg a.i./L) to prey upon mosquito larvae were not affected. Harmful effects on the backswimmer predatory abilities were detected only at concentrations of 150 mg a.i./L and when there was a higher prey availability (i.e., 9 larvae/100 mL of water). Together, our findings indicate that the reduced community effectiveness of this insecticide derives from factors other than its detrimental effects on non-target organisms such as the backswimmers.

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Detrimental effects of pyriproxyfen on the detoxification and abilities of Belostoma anurum to prey upon Aedes aegypti larvae

Cited by 11 publications

References 45 publications

Evaluation of the Toxicity and Sublethal Effects of Acetamiprid and Dinotefuran on the Predator Chrysopa pallens (Rambur) (Neuroptera: Chrysopidae)

Evaluation of the Toxicity and Sublethal Effects of Acetamiprid and Dinotefuran on the Predator Chrysopa pallens (Rambur) (Neuroptera: Chrysopidae)

Methanolic Extracts of Chiococca alba in Aedes aegypti Biorational Management: Larvicidal and Repellent Potential, and Selectivity against Non-Target Organisms

Predatory Abilities of The Backswimmer Buenoa Amnigenus Are Not Impaired After Sublethal Exposures To Pyriproxyfen

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