Effect of Fenvalerate-20EC on Sericigenous Insects

Vyjayanthi, N.; Subramanyam, M. V. V.

doi:10.1006/eesa.2002.2229

Cited by 14 publications

(1 citation statement)

References 24 publications

(16 reference statements)

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“…The membrane-bound enzyme and SbTre-2 are involved in incorporating trehalose from the blood into muscular cells and then providing the energy required by visceral muscles to support peristaltic movement of the midgut for active feeding [31,32]. Trehalase activity was enhanced in the midgut of silkworms treated with fenvalerate [33]. However, the enhanced trehalase activity may also be due to increased hydrolysis of trehalose to two glucose moieties.…”

Section: Discussionmentioning

confidence: 99%

The effects of triazophos on the trehalose content, trehalase activity and their gene expression in the brown planthopper Nilaparvata lugens (Stål) (Hemiptera: Delphacidae)

Zhao

Huang

et al. 2011

Pesticide Biochemistry and Physiology

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Graphical abstractA previous study demonstrated that the flight capacity of Nilaparvata lugens adults treated with triazophos was enhanced significantly. However, the physiological and regulative mechanisms of the flight enhancement are not well understood. Trehalose is a primary blood sugar in insects, and the enzyme trehalase is involved in energy metabolism. The present study investigated the effects of triazophos on the trehalose content, trehalase activity (soluble trehalase and membrane-bound trehalase) and the mRNA transcript levels of their corresponding genes (NlTre-1 and NlTre-2) in fifth instar nymphs, as well as in the brachypterous and macropterous N. lugens adult females. Our findings showed that the trehalose content in fifth instar nymphs as well as in the brachypterous and the macropterous adults significantly decreased following triazophos treatment. However, the glucose content, soluble trehalase activity and expression level of NlTre-1 mRNA increased significantly compared to the controls. No significant enhancement of NlTre-2 expression was found, indicating that regulation of energy metabolism of triazophos-induced flight capacity in N. lugens was not associated with NlTre-2 expression. In addition, soluble trehalase activity and the expression level of NlTre-1 mRNA in the macropterous females was significantly higher than that in the brachypterous females. The present findings provide valuable information on the molecular and regulative mechanisms of the increased flight capacity found in adult N. lugens after treatment with triazophos.Highlights► The physiological and regulative mechanisms of insecticide-induced the flight enhancement are not well understood. ► The trehalose content in fifth instar nymphs, and in the brachypterous and the macropterous adults of the insect decreased following triazophos treatment. ► The glucose content, soluble trehalase activity and expression level of NlTre-1 mRNA increased significantly compared to the controls. ► Soluble trehalase activity and the expression level of NlTre-1 mRNA in the macropterous females was higher than that in the brachypterous females.

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Section: Discussionmentioning

confidence: 99%

The effects of triazophos on the trehalose content, trehalase activity and their gene expression in the brown planthopper Nilaparvata lugens (Stål) (Hemiptera: Delphacidae)

Zhao

Huang

et al. 2011

Pesticide Biochemistry and Physiology

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ANTIOXIDANT ENZYMES AS DEFENSE MECHANISM AGAINST OXIDATIVE STRESS IN MIDGUT TISSUE AND HEMOCYTES OF Bombyx mori LARVAE SUBJECTED TO VARIOUS STRESSORS

Micheal

Subramanyam

2013

Arch Insect Biochem Physiol

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The mechanism of damage by trace amounts of acetamiprid to the midgut of the silkworm, Bombyx mori

Wang

et al. 2019

Environmental Toxicology

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Acetamiprid is widely used for agricultural pest control. However, it remains poorly understood whether the environmental residues of acetamiprid have the potential effects on economic insect. In this study, we evaluated the effects of acetamiprid on silkworm growth and development. The exposure to trace amounts of acetamiprid significantly decreased body weight, viability, and spinning ability. In addition, the activity of trypsin in the midgut was decreased after exposure. DGE and KEGG pathway enrichment analysis revealed that the significantly differentially expressed genes were mainly involved in nutrient metabolism, stress responses, and inflammation pathways. These results, in combination with hematoxylin‐eosin staining and transmission electron microscopy, indicated that acetamiprid could cause oxidative damage to midgut, lead to inflammatory responses, and affect the activities of midgut digestive enzymes, thus resulting in abnormal growth and development. Our findings greatly contributed to the evaluation of the effects of acetamiprid residues on other nontarget beneficial insect.

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Effect of Fenvalerate-20EC on Sericigenous Insects

Cited by 14 publications

References 24 publications

The effects of triazophos on the trehalose content, trehalase activity and their gene expression in the brown planthopper Nilaparvata lugens (Stål) (Hemiptera: Delphacidae)

The effects of triazophos on the trehalose content, trehalase activity and their gene expression in the brown planthopper Nilaparvata lugens (Stål) (Hemiptera: Delphacidae)

ANTIOXIDANT ENZYMES AS DEFENSE MECHANISM AGAINST OXIDATIVE STRESS IN MIDGUT TISSUE AND HEMOCYTES OF Bombyx mori LARVAE SUBJECTED TO VARIOUS STRESSORS

The mechanism of damage by trace amounts of acetamiprid to the midgut of the silkworm, Bombyx mori

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