نتایج جستجو برای: insecticidal effect
تعداد نتایج: 1645675 فیلتر نتایج به سال:
The CHCl3-soluble extract of Piper guanacastensis (Piperaceae) was found to have noteworthy insecticidal activity to Aedes atropalpus mosquito larvae (LC50 80.5 micrograms/mL). Bioassay-guided fractionation afforded methyl 4-hydroxy-3-(3'-methyl-2'-butenyl)benzoate (1) as the major bioactive constituent (LC50 20.5 micrograms/mL). The separation of compound 1 from its transesterification artifac...
A library of 600 taxonomically diverse Panamanian plant extracts was screened for fungicidal, insecticidal, and herbicidal activities. A total of 19 active extracts were submitted to HPLC-based activity profiling, and extracts of Bocconia frutescens, Miconia affinis, Myrcia splendens, Combretum aff. laxum, and Erythroxylum macrophyllum were selected for the isolation of compounds. Chelerythrine...
the corresponding one ef neonicotinoids indicated that the latter was far deshielded as compared with the forrner. The result implies that the unsharcd electron pair on the concerned nitrogcn atom is delocalized by the presencc of strang electTon-withdrawing group and the nitrogen atom becomes partially positivc. Such nitrogen is enough to interact with the insect nAChR, but not with the verteb...
Six mexicanolide limonoids isolated from the dichloromethane extract of the fruits of Cipadessa fruticosa Blume (Meliaceae) were evaluated against Spodoptera frugiperda (J. E. Smith). Gedunin was used as a positive control. When incorporated into an artificial diet of neonates at 50.0 mg kg(-1), febrifugin A showed 73.3% mortality. All the compounds showed moderate insecticidal activity, except...
OBJECTIVE To test the effectiveness of large scale distribution of longlasting nets treated with insecticide in reducing the incidence of visceral leishmaniasis in India and Nepal. DESIGN Paired cluster randomised controlled trial designed to detect a 50% reduction in incidence of Leishmania donovani infection. SETTING Villages in Muzaffarpur district in India and Saptari, Sunsari, and Mora...
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