Lethal and sublethal effects of insecticides used in cotton crop on the mealybug endoparasitoid <i>Aenasius arizonensis</i>

Karmakar, Prasun; Shera, P. S.

doi:10.1080/09670874.2018.1538544

Cited by 11 publications

(6 citation statements)

References 24 publications

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“…near pseudococci from mummified hosts, recorded low mortality, suggesting the important role of the mummy case as a barrier against pesticides. Similarly, in a study of another mealybug endoparasitoid, Aenasius arizonensis Girault, it was demonstrated that some pesticides, such as spiromesifen, buprofezin, and flonicamid, were unable to penetrate the mummy case, and thus had no effect on development and emergence of the parasitoid (Karmakar and Shera 2020). Although previous research suggested that the chances of contacting pesticides are high at the time of emergence (Islam and Copland 1997, Walton and Pringle 1999), this phenomenon depends upon the emerging insect's behavior.…”

Section: Discussionmentioning

confidence: 99%

Toxicity assessment of common acaricides and mineral oils on Anagyrus vladimiri, an effective biocontrol agent of citrus mealybug

Singh

Protasov

Kramer

et al. 2023

Journal of Economic Entomology

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Chemical pesticides, while playing an important role in the suppression of insect pests, should be used in a manner that minimizes negative effects on natural enemies. The parasitoid, Anagyrus vladimiri Triapitsyn (Hymenoptera: Encyrtidae), plays an important role in the management of mealybug pests of citrus groves in the Mediterranean region. This study was conducted to evaluate the effect of commonly used acaricides (Spirodiclofen, Spirotetramat, Sulfur, Fenpyroximate, Abamectin) and mineral oils (Levanola, EOS, JMS, and Ultrapaz) on acute mortality of A. vladimiri. Toxicity was assessed in 4 cases: (i) direct spray application on adults, (ii) pesticide application on the mummified host, (iii) feeding with contaminated food, and (iv) contact with pesticide residue. The pesticide Abamectin, applied alone and with Levanola oil was highly toxic to adults in all bioassays, with the exception of direct spray application on the mummified host. Fenpyroximate was found to be highly toxic only when sprayed directly on adults, and sulfur was slightly harmful. Mineral oils were harmful when ingested with food; otherwise, they did not cause appreciable adult mortality. The findings of the present study suggest that all tested materials, with the exception of Abamectin and Fenpyroximate, are compatible with the survival of A. vladimiri. Direct ingestion of oils can, however, cause a degree of mortality. Given that indiscriminate use of these pesticides may affect the population ecology of A. vladimiri, they should be used with caution.

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Section: Discussionmentioning

confidence: 99%

Toxicity assessment of common acaricides and mineral oils on Anagyrus vladimiri, an effective biocontrol agent of citrus mealybug

Singh

Protasov

Kramer

et al. 2023

Journal of Economic Entomology

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“…Foliar surface residues of acetamiprid on apple decreased to lower than 50% 7 DAT (Jamil et al, 2019), which might result in foliar surface residues lower than 0.42 mg L -1 ai at 35 DAT. .7 ± 3.9 12.9 ± 3.9 10 0.05x 18 0.0 ± 3.9 3.3 ± 4.2 1 20 0.10x 15 11.9 ± 8.0 15.8 ± 7.7 1 50 0.25x 18 0.0 ± 3.9 8.7 ± 0.5 1 100 0.50x 15 4.8 ± 5.9 10.7 ± 5.9 1 200 1x 15 0.0 ± 6.7 0.0 ± 0.0 1 χ 2 , P 5.31 ≥ 0.05 6.23 ≥ 0.05 Pyriproxyfen 0 Control 13 17.8 ± 15 22.2 ± 13.5 2.5 0.05x 13 0.0 ± 7.8 0.0 ± 2.2 1 5.0 0.10x 13 0.0 ± 8.0 0.0 ± 0.0 1 12.5 0.25x 13 0.0 ± 10.2 0.0 ± 0.0 1 25.0 0.50x 13 0.0 ± 3.9 0.0 ± 0.0 1 50.0 1x 13 0.0 ± 12.4 2.85 ± 13.5 1 χ Both IGRs, buprofezin and pyriproxyfen, were harmless or slightly harmful to adults of several encyrtid parasitoid species of mealybugs (Wakgari and Giliomee, 2003;Rothwangl et al, 2004;Cloyd and Dickinson, 2006;Suma et al, 2009;Karmakar and Shera, 2018). However, when the field rate of buprofezin was applied on parasitized vine mealybug an increase in development time was found for Anagyrus sp.…”

Section: Discussionmentioning

confidence: 99%

Acute toxicity of lethal and sublethal concentrations of neonicotinoid, insect growth regulator and diamide insecticides on natural enemies of the woolly apple aphid and the obscure mealybug

Radrigán-Navarro

Beers

Alvear

et al. 2021

Chil. j. agric. res.

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Based on the importance of using low-risk compounds to protect beneficial agents, the present study evaluated the acute toxicity of lethal and sublethal concentrations of the insecticides thiacloprid, pyriproxyfen, and chlorantraniliprole on adults of Aphelinus mali (Haldeman), the main parasitoid of the woolly apple aphid, Eriosoma lanigerum (Hausmann). Similarly, acetamiprid, buprofezin, pyriproxyfen, chlorantraniliprole and cyantraniliprole were evaluated on adults of the parasitoid Acerophagus flavidulus (Brethés) and also on larvae and adults of the predator Cryptolaemus montrouzieri Mulsant, both species important natural enemies of the obscure mealybug, Pseudococcus viburni (Signoret). Natural enemies were exposed to insecticide residues of minimum recommended rate (1x) and between one to four concentrations (0.5x, 0.25x, 0.1x and 0.05x) of the minimum recommended rate on apple leaves. Our results indicate that thiacloprid was moderately harmful to A. mali at 1x, and acetamiprid was harmful to A. flavidulus causing 100% mortality from 0.1x to 1x concentrations. Buprofezin, pyriproxyfen and chlorantraniliprole were harmless or slightly harmful for both parasitoids. Cyantraniliprole was slightly harmful from 0.25x to 1x for A. flavidulus. For C. montrouzieri, acetamiprid was harmless or slightly harmful for larvae and adults on the concentrations evaluated. Buprofezin, pyriproxyfen and chlorantraniliprole were harmless for larvae and adults of C. montrouzieri. Cyantraniliprole was slightly harmful on larvae and moderately harmful on adults of C. montrouzieri at 1x. Our data suggest that buprofezin, pyriproxyfen and chlorantraniliprole could be compatible with the natural enemies evaluated, while thiacloprid and acetamiprid were less compatible with parasitoids than with the predator. Finally, cyantraniliprole seems to be less compatible than chlorantraniliprole at 1x with the natural enemies evaluated.

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“…The efficacy of flonicamid, a selective systemic pesticide that interferes with the alimentary behavior of several insect species [59,60], was somehow inconsistent throughout the seasons and locations in the present study; its efficacy was significant only in two out of six trials where it was tested. However, as it was shown to have a small impact on parasitoids of other Coccidae species, causing the lowest reduction in their parasitism rate [61], its application and efficacy should be further verified.…”

Section: Ecology Of Parthenolecanium Sp Parasitesmentioning

confidence: 99%

Integrated Control of Scales on Highbush Blueberry in Poland

Tartanus,

Sobieszek,

Furmańczyk-Gnyp

et al. 2023

Horticulturae

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In the past decade, the development of highbush blueberry production in Poland has been followed by the occurrence of new pests in the plantations, including scales. Since both the assessment of the populations of natural enemies present in a territory and the knowledge of the scale species present in the crop are crucial for the correct application of IPM strategies, a study was carried out to address these aspects and evaluate the efficacy of several active substances in controlling Parthenolecanium spp. in several highbush blueberry plantations. Specimens of adult larvae collected on several plantations were phylogenetically closely linked to two species, P. corni and P. fletcheri. However, considering the ecology and behavior of these species, it was concluded that the pest population was more likely to belong to P. corni. Analyzing the scale parasitoids’ community present in the different locations, it emerged that it was quite diversified, including species affecting both the initial and adult biological phases of the scales, with differences also in the population size and diversity, including both general or specialized parasitoids and predators. The different active substances tested in the efficacy trials, which included both synthetic and bio-based compounds, were suitable for controlling the scale infestation. However, the different efficacy observed between them, depending on season and location, could be interpreted taking into consideration the initial level of infestation. It is concluded that applying an IPM strategy that combines agronomical practices with the application of insecticides with different mechanisms of action, attentive to the benefit of protecting natural enemies, can result in satisfactory control of P. corni in highbush blueberry plantations.

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Lethal and sublethal effects of insecticides used in cotton crop on the mealybug endoparasitoid Aenasius arizonensis

Cited by 11 publications

References 24 publications

Toxicity assessment of common acaricides and mineral oils on Anagyrus vladimiri, an effective biocontrol agent of citrus mealybug

Toxicity assessment of common acaricides and mineral oils on Anagyrus vladimiri, an effective biocontrol agent of citrus mealybug

Acute toxicity of lethal and sublethal concentrations of neonicotinoid, insect growth regulator and diamide insecticides on natural enemies of the woolly apple aphid and the obscure mealybug

Integrated Control of Scales on Highbush Blueberry in Poland

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