نتایج جستجو برای: lc50 and lt50

تعداد نتایج: 16828052  

2016
Soma Dasgupta Hijam Ranjit Singh Sudripta Das Sunil Kumar Pathak Rakesh Kumar Bhola

Hyposidra talaca is a major defoliating pest of tea plants in north-eastern part of India. In this study, we look for variations (if any) in the attacking virus. Viral samples were collected from different regions of the northern part of West Bengal in India and were analyzed by PCR technique to study the variations across the region. The partial segment of the HytaNPV polyhedrin gene was clone...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده کشاورزی 1389

حشره کش های شیمیایی نقش عمده ای در حفاظت ذخایر غذایی جهان دارند. با این حال کاربرد آنها منجر به افزایش مشکلات زیست محیطی و اثرات نامطلوب علیه انسان و بروز مقاومت در آفات شده است. امروزه برنامه-های در حال رشد کشاورزی پایدار در تلاش است تا از گسترش و شیوع آفات و بیماری های متعددی که سبب خسارت جدی به محصولات کشاورزی می شوند، بدون برهم زدن تعادل طبیعی اکوسیستم و از طریق جایگزین-شونده های کم خطر و ا...

Journal: :Journal of economic entomology 2007
F B Antwi D L Olson D R Carey

Studies were done comparing the insecticides SpinTor (spinosad), BotaniGard (Beauveria bassiana), Neemix (azadirachtin), and Surround (kaolin, a clay) with conventional chemical insecticides Capture (bifenthrin) and Helix XTra (thiamethoxam), all applied at seven rates in a 7-d assay to assess their impact on adult crucifer flea beetle, Phyllotreta cruciferae (Goeze) (Coleoptera: Chrysomelidae)...

چکیده  یکی از مشهورترین قارچ­های بیمارگر حشرات،  anisopliae Metarhiziumمی باشد که در خاک وجود داشته و از قابلیت بیمار کردن آفات گیاهی و جانوری برخوردار می­باشد. شته ی سبز هلو(Myzus persicae) در کلیه­ی مناطق ایران وجود داشته و به درختان هلو، مرکبات، سبزیجات و گیاهان زینتی گلخانه­ای  خسارت می زند. در این مطالعه مرگ­ و میر شته­ی سبز هلو توسط قارچ Metarhiziumanisopliae مورد بر رسی قرار گرفت. از دو ...

Journal: :The Southeast Asian journal of tropical medicine and public health 2012
Dechen Pemo Narumon Komalamisra Sungsit Sungvornyothin Siriluck Attrapadung

We conducted this study to determine the insecticide susceptibility of two malaria vectors, Anopheles dirus and Anopheles minimus from Kanchanaburi Province, Thailand. The mosquitoes were collected and reared under laboratory conditions. The test was carried out on unfed F-1 female mosquitoes using a standard WHO testing protocol. The LD50 and LD90 of deltamethrin in both species were tested fo...

2009
I Ling A S Sulaiman H Othman

BACKGROUND The efficacy of Piper aduncum essential oil was evaluated against Periplaneta americana adults and nymphs in the laboratory. METHODS The plant essential oil at varying concentrations ranging between 10,000 to 80,000 ppm were placed inside glass beakers, rolled horizontally to ensure the essential oil covers all sides of the beakers and exposed to adults and nymphs of P. americana. ...

Journal: :Agronomy 2022

Fall armyworm, Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae), is a destructive pest of wide array agricultural and horticultural crops worldwide. This in vitro research assessed the combined effect methanolic extracts indigenous flora Soone Valley (Khushab, Pakistan) nine commonly used synthetic insecticides against 3rd instar larvae S. using leaf-dip bioassay method. Toxicity bioas...

Journal: :به نژادی گیاهان زراعی و باغی 0
روح اله کریمی استادیار گروه مهندسی فضای سبز، دانشکده کشاورزی، دانشگاه ملایر، ملایر احمد ارشادی دانشیار گروه باغبانی، دانشکده کشاورزی، دانشگاه بوعلی سینا همدان فرهاد کرمی مربی، بخش باغبانی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان کردستان، سنندج

in this research, the bud and cane winter cold tolerance of 22 field-grown grapevine cultivars of kourdestan province agricultural and natural resources research and education center was evaluated at jan. and mar. stages in 2012. in these cultivars soluble carbohydrates and water content changes of buds and canes during dormant period also were measured. after exposure to different freezing tem...

Journal: :Journal of economic entomology 2009
Christopher M Ranger Michael E Reding Jason B Oliver James J Moyseenko Nadeer N Youssef

The toxicity of eight botanically based biopesticides was evaluated against third instars of the scarab larvae (Coleoptera: Scarabaeidae) Popillia japonica Newman, Rhizotrogus majalis (Razoumowsky), Anomala orientalis Waterhouse, and Cyclocephala borealis Arrow. Soil dip bioassays were used to obtain concentration-mortality data 7 d after treatment of larvae, leading to the calculation of LC50 ...

2017
Christelle Ngba Essebe Orane Visvikis Marguerite Fines-Guyon Anne Vergne Vincent Cattoir Alain Lecoustumier Emmanuel Lemichez Albert Sotto Jean-Philippe Lavigne Catherine Dunyach-Remy

Social bacterial interactions are considered essential in numerous infectious diseases, particularly in wounds. Foot ulcers are a common complication in diabetic patients and these ulcers become frequently infected. This infection is usually polymicrobial promoting cell-to-cell communications. Staphylococcus aureus is the most prevalent pathogen isolated. Its association with Helcococcus kunzii...

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