نتایج جستجو برای: ovicidal effect
تعداد نتایج: 1641857 فیلتر نتایج به سال:
A total of 53 plant essential oils were tested for their insecticidal activities against eggs, nymphs, and adults of Trialeurodes vaporariorum Westwood, using an impregnated filter paper bioassays without allowing direct contact. Responses varied according to oil type and dose, and developmental stage of the insect. Bay, caraway seed, clove leaf, lemon eucalyptus, lime dis 5 F, pennyroyal, pepp...
Coumarin is a phenolic compound that mainly affects the liver due to its metabolization into a toxic compound. The deterrent and ovicidal activities of coumarin in insect models such as Drosophila melanogaster have been reported. Here we explore the molecular mechanisms by which these insects protect themselves and their eggs from this toxic plant metabolite. Coumarin was fatal to the flies in ...
Background: Schistosomiasis is a chronic debilitating parasitic disease. Long-term repeated use of praziquantel (PZQ) for control of the disease morbidity may lead to resistance or reduced susceptibility to the drug. Artemether (ART), the anti-malarial drug may become an alternative therapy to PZQ as it also displays anti-schistosomal properties. Objective: To assess the effects of artemether e...
background: fascioliasis is a zoonotic disease caused by the liver fluke fasciola hepatica . drug resistance, high costs of treatment and economic losses in meat production have emerged the need of alternative control measures into consideration. the aim of this study was to evaluate the in vitro ovicidal activity of paecilomyces lilacinus fungus on f. hepatica eggs. methods: p. lilacinus isola...
current studies in second language (l2) learning have revealed the positive role of corrective feedback (cf) in both oral and written forms in different language features. the present study was an attempt to investigate the effect of both direct and indirect written corrective feedback (wcf) on the use of grammatical collocations in l2 writing. the study also sought to examine whether the effec...
the aim of this study has been to find answers for the following questions: 1. what is the effect of immediate correction on students pronunciation errors? 2. what would be the effect of teaching the more rgular patterns of english pronunciation? 3. is there any significant difference between the two methods of dealing with pronuciation errore, i. e., correction and the teaching of the regular ...
flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
World Health Organization appreciated the importance of medicinal plants for public health care in developing nations. Eclipta alba ( Bhringaraja ) having important role in the traditional Ayurvedic and Unani systems of holistic health and herbal medicine of the east.The principal constituents of Eclipta alba are coumestan derivatives like wedololactone[1.6%], demethylwedelolactone, desmethyl-w...
Resistance of head lice to insecticides with a neurotoxic mode of action, such as permethrin and malathion, is increasing in incidence and geographic extent. As a consequence, physically acting pediculicidal products have emerged. Dimeticones are synthetic silicone oils of low surface tension and can therefore coat most surfaces, thus also killing head lice (Pediculus humanus capitis) by physic...
هدف این مطالعه تعیین کردن این مساله است که آیا فراگیران فارسی زبان قادر به تطبیق پارامتری ضمیر موصولی that در جملات ساده و پیچیده ی انگلیسی در سایه اصل دستور جهانی هستند یا خیر. به علاوه نقش جنسیت در رابطه با آزمون تشخیص درستی یا نادرستی جملات دستوری مورد بررسی قرار گرفت. داده ها از 54 دانشجوی فراگیر زبان انگلیسی در دانشگاه فردوسی مشهد گردآوری شد. شرکت کنندگان در آزمون شامل 28 زن (51.85 درصد)و ...
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