نتایج جستجو برای: fenvalerate

تعداد نتایج: 214  

Journal: :Chemical research in toxicology 2005
Huazhang Huang Christopher D Fleming Kosuke Nishi Matthew R Redinbo Bruce D Hammock

Mammalian hepatic carboxylesterases (CEs) play important roles in the detoxification of ester-containing pyrethroids, which are widely used for the control of agricultural pests and disease vectors such as mosquitoes. Pyrethroids and pyrethroid-like fluorescent substrates exhibit a consistent pattern of stereoselective hydrolysis by a recombinant murine hepatic CE. We sought to understand wheth...

Journal: :Environmental toxicology and chemistry 2005
Barry J Pieters Albrecht Paschke Sebastián Reynaldi Michiel H S Kraak Wim Admiraal Matthias Liess

Laboratory ecotoxicity tests may not adequately evaluate the effects of pesticides, because they often do not include more environmentally relevant conditions, such as pulsed toxicant exposures and low food conditions. Therefore, we tested the effects of a pulse of the pyrethroid insecticide fenvalerate (FV) on the life history and population growth rate (r) of the cladoceran Daphnia magna. The...

Journal: :Pest management science 2009
Haibo Bao Shuhua Liu Jianhua Gu Xizhen Wang Xiaolong Liang Zewen Liu

BACKGROUND The brown planthopper (BPH), Nilaparvata lugens Stål, is a major rice pest in many parts of Asia. Neonicotinoids such as imidacloprid and dinotefuran are widely used for control of this pest, and resistance to these insecticides has developed in recent years. This pest has also been widely exposed to triazophos and fenvalerate, although these insecticides are not used for the control...

2018
Rui-Long Wang Shi-Wei Liu Scott R. Baerson Zhong Qin Zhi-Hui Ma Yi-Juan Su Jia-En Zhang

In insects, cytochrome P450 monooxygenases (P450s or CYPs) are known to be involved in the detoxification and metabolism of insecticides, leading to increased resistance in insect populations. Spodoptera exigua is a serious polyphagous insect pest worldwide and has developed resistance to various insecticides. In this study, a novel CYP3 clan P450 gene CYP9A105 was identified and characterized ...

2003
C. N. Sun

High levels of resistance to the major categories of insecticides, ie, organophosphorus, carbamates, pyrethroids, and DDT, have been detected in the diamondback moth in Taiwan. Synergist studies have provided insufficient evidence to show significant involvement of known metabolic systems, such as microsomal oxidation, esterase hydrolysis, and glutathione conjugation in organophosphorus and car...

Journal: :Chemical research in toxicology 2005
Huazhang Huang Jeanette E Stok Donald W Stoutamire Shirley J Gee Bruce D Hammock

Pyrethroids are now the world's most extensively used insecticides. One of the common metabolic routes of pyrethroid insecticides in living systems is hydrolysis by carboxylesterases, and this hydrolysis may be stereospecific since most pyrethroid insecticides have chiral centers. In previous studies, pyrethroid-like fluorescent substrates have been shown to be hydrolyzed in a fashion similar t...

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