Hormoligosis Evaluation and Efficacy of Fenoxycarb on the Cotton Mealybug (Phenacoccus solenopsis)

Idrees, Muhammad; Gogi, Muhammad Dildar; Majeed, Waqar; Mozamal, Mobeen; Imran, Hafiz Muhammad; Kanwal, Sobia; Maalik, Sadia

doi:10.1590/1678-4324-2022210631

Cited by 2 publications

(1 citation statement)

References 26 publications

(32 reference statements)

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“…The toxicity of some pesticides to organisms, including nontarget microorganisms, has been a significant concern in recent years [ 5 , 6 , 7 , 8 ]. Silkworms are sensitive to adverse conditions, including pesticides, because they are maintained under isolated conditions for an extended period [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Sublethal Effects of Neonicotinoid Insecticides on the Development, Body Weight and Economic Characteristics of Silkworm

Chen

Sun

Yang

et al. 2023

Toxics

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Silkworm Bombyx mori (L.) (Lepidoptera: Bombycidae) is a critical insect for silk producers, but the inappropriate application of insecticides negatively affects the physiology and behavior of silkworms. This study found that the effects of neonicotinoid insecticides applied using two spraying methods on the growth and development of silkworms were different: the median lethal concentration (LC50) values of two pesticides applied using the leaf-dipping method were 0.33 and 0.83 mg L−1 and those of two pesticides applied using the quantitative spraying method were 0.91 and 1.23 mg kg−1. The concentration of pesticides on the mulberry leaves did not decrease after their application using the quantitative spraying method, and a uniform spraying density was observed after the mulberry leaves were air-dried (no liquid) under realistic conditions. We then treated silkworms with the quantitative spraying method and leaf-dipping method. The treatment of silkworm larvae with imidacloprid and thiamethoxam at sublethal concentrations significantly prolonged the development time and significantly decreased the weight and pupation rate, as well as economic indicators of enamel layers and sputum production. Thiamethoxam treatment significantly increased the activities of carboxylesterase (CarE) and glutathione-S-transferase (GST). The activity of CarE and GST increased, decreased, and then increased, and the highest activity was detected on the 10th and 12th days. Thiamethoxam exposure significantly elevated the transcription levels of CarE-11, GSTe3 and GSTz2 and induced DNA damage in hemocytes. This study confirmed that the quantitative spray method is more stable than the leaf-dipping method. Moreover, imidacloprid and thiamethoxam treatment affected the economy and indexes of silkworms and induced changes in detoxification enzymes and DNA damage in silkworms. These results provide a basis for understanding the mechanism of the sublethal effects of insecticides on silkworms.

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Section: Introductionmentioning

confidence: 99%

Sublethal Effects of Neonicotinoid Insecticides on the Development, Body Weight and Economic Characteristics of Silkworm

Chen

Sun

Yang

et al. 2023

Toxics

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Sublethal impacts of Buprofezin and Pyriproxyfen on cotton mealybug Phenacoccus solenopsis through transgenerational hormesis

Hussain,

Khan,

Shahid

et al. 2024

Phytoparasitica

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Insect pests are exposed to repeated applications of pesticides to effectively manage the pest species. This induces insecticide resistance and resurgence of target insect pest with an accelerated growth rate of the targeted individual. The present experiment was put into execution to examine transgenerational hormesis against different biological parameters of Phenacoccus solenopsis when exposed to sublethal concentrations of Pyriproxyfen (Pyriproxyfen ® 10 EC) and Buprofezin (Buprofezin ® 25 WP). Insects exhibited concentration-dependent mortality diminishing in succeeding generations. P. solenopsis receiving the sublethal concentration of LC 10 (0.03%) of Pyriproxyfen ® exhibited hormesis in natality in generation (G)-4 (1282.4 nymphs/20 females) and G-5 (1296.2 nymphs/20 females). The adult female exposed to LC 10 (0.02%) of Buprofezin ® also expressed hormesis in natality in G-4 (1261.5 nymphs/20 females) and G-5 (1282.8 nymphs/20 females). Hormesis in female longevity was also found when treated with a sublethal concentration of LC 10 for Pyriproxyfen ® (0.03%) in generation four (46.41 days) and ve (46.35 days). Similarly, adults in G-4 and G-5 at a sublethal concentration of LC 10 (0.02%) for Buprofezin ® induced hormesis in G-4 (45.53 days) and G-5 (46.69days), whereas in G-4 (4.79 days) and G-5 (4.92days) at stimulatory concentrations of LC 10 (0.03%) of pyriproxyfen ® . The whole research ended up with a conclusion that continuous administration of sublethal concentrations can induce stimulations in different biological traits demonstrating the surprising biological capacity of insects to cope with stressors and contemplation of this aspect is necessary when integrating the pest management programs.

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Hormoligosis Evaluation and Efficacy of Fenoxycarb on the Cotton Mealybug (Phenacoccus solenopsis)

Cited by 2 publications

References 26 publications

Sublethal Effects of Neonicotinoid Insecticides on the Development, Body Weight and Economic Characteristics of Silkworm

Sublethal Effects of Neonicotinoid Insecticides on the Development, Body Weight and Economic Characteristics of Silkworm

Sublethal impacts of Buprofezin and Pyriproxyfen on cotton mealybug Phenacoccus solenopsis through transgenerational hormesis

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