نتایج جستجو برای: mdicago scutellata
تعداد نتایج: 235 فیلتر نتایج به سال:
In South Africa bee stings are most commonly caused by either Apis mellifera capensis or A. mellifera scutellata, indigenous species which are notoriously aggressive when compared to European honey bees. According to Statistics South Africa, 109 deaths were documented for the period 2001-2011 as having been caused by hornets, wasps, and bees (ICD10-X26). This appears to be a small number but, a...
واکنش جوانه¬زنی بذرهای گیاهان مختلف به دما گوناگون است. سرعت و درصد جوانه¬زنی ¬در دما (های) مطلوب در حداکثر خود است و در دمای سقف و پایه به صفر می¬رسد. هدف از این مطالعه (1) بررسی واکنش جوانه¬زنی به دما و (2) ارزیابی دماهای کاردینال برای درصد و سرعت جوانه¬زنی در یونجه حلزونی بود. آزمایش به صورت تجزیه مرکب در قالب طرح کاملا تصادفی انجام شد. بنابراین، بذرها در دماهای 10 تا 40 درجه سانتی¬گراد با ف...
As abelhas africanas (Apis mellifera scutellata) foram introduzidas no Brasil na década de 1950 e, por acidente, cruzaram com outras subespécies melíferas europeias. Isso proporcionou o surgimento híbridos conhecidos atualmente como africanizadas, que possuem características rusticidade e maior capacidade enxamear. A Amazônia mostra potencial para desenvolvimento da apicultura devido suas diver...
Studies were undertaken to determine the impact of environmental variables temperature (12.5/9.5, 20/17, 27/24 °C day/night) and soil moisture (100, 50% WHC), their interaction with Phoma medicaginis infection, on production phytoestrogen coumestrol in annual Medicago rugosa cv. Paraponto M. scutellata Sava. Disease factors measured included leaf disease incidence/severity, petiole/stem yellowi...
Different types of water bodies in lowland river floodplains represent vital biodiversity havens and encompass diverse microhabitats, which are essential for structuring different macroinvertebrate communities. Chironomidae larvae (Diptera) an inseparable part these communities, with their high richness abundance. In three body within the Danube floodplain Kopa?ki Rit Croatia, over course four ...
Recent large-scale mortality of honeybee colonies is believed to be caused by multiple interactions between diseases, parasites, pesticide exposure, and other stress factors. To test whether a dual challenge has an additive effect in reducing survival, we experimentally stimulated the immune system of caged Apis mellifera scutellata workers from six colonies by injecting saline or Escherichia c...
Foraging animals must often decide among resources which vary in quality and quantity. Nectar is a resource that exists along a continuum of quality in terms of sugar concentration and is the primary energy source for bees. Alternative sugar sources exist, including fruit juice, which generally has lower energetic value than nectar. We observed many honeybees (Apis mellifera scutellata) foragin...
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