نتایج جستجو برای: lc50 and lt50
تعداد نتایج: 16828052 فیلتر نتایج به سال:
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...
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...
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 ...
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...
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. ...
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...
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...
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 ...
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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