نتایج جستجو برای: botswana
تعداد نتایج: 3279 فیلتر نتایج به سال:
A laboratory study was conducted to investigate the effects of natural products on the reproduction and damage of Callosobruchus maculatus, the cowpea weevil, on cowpea seeds at Botswana College of Agriculture in Gaborone, Botswana. The cowpea variety Blackeye was used in the study. Fifty grams of each plant product (garlic, peppermint and chilies) was added to 500 g of the cowpea seeds. Findin...
Many students in Botswana migrate from small rural villages and towns to the larger urban centres to attend university, and are subsequently required to adapt or acculturate to their new environments. However, the existing literature and research on acculturation experiences of students who migrate from rural-to-urban centres in Botswana is almost non-existent. The current study was therefore a...
A retrospective serological survey of African horse sickness (AHS) in Botswana covering a 10-year period (1995-2004) is reported. The survey involved horses showing clinical symptoms of the disease; the horses had not been vaccinated against AHS. Over the period surveyed, serological evidence suggestive of infection with AHS virus (AHSV) was found in 99 clinical cases out of which 41.4% (41/99)...
For many decades, Botswana has been engaged in various malaria control activities that involved programmes that focused on the elimination of the malaria vector Anopheles ara‐ biensis, by using DDT and pyrethroids. Despite the numerous and continuous application of these insecticides, studies have shown that there is susceptibility of this vector to DDT and pyrethroids in Botswana. Natural inse...
One of the objectives of agricultural development in Botswana is the increase of agricultural productivity in both arable and livestock production in order to increase farm incomes and thus help to make agriculture a sustainable activity. This paper looks at the challenges that Botswana faces in meeting this objective while minimizing any land degradation that may accompany the process of incre...
This paper implements five methods to correct näıve HIV seroprevalence rates for the selection bias induced by voluntary testing. We apply the methodologies to estimate the prevalence of HIV in Botswana.
Roads play a significant part of economic development. Due to financial constraints, in many developing countries like Botswana, there are large networks unpaved roads. The major detriment effect or gravel roads is dust emissions. Dust affects the climate change which turn increases generation dust. This has huge impact on human health risen great concern. best solution mitigate emission from s...
Pronounced subsidence leading to summer drought over southern Africa causes warmer than average surface air temperatures or even heatwave (HW) conditions. We investigated the occurrence of HWs during South based on station data and ECMWF ERA5 reanalyses. Temperature observations from African Weather Service were analyzed for seasonality long-term trends (1981–2020) as background variability HWs...
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