A5064412709- Insect and Pesticide Research
- Insect and Arachnid Ecology and Behavior
- Plant and animal studies
- Bee Products Chemical Analysis
- Healthcare and Venom Research
- Hong Kong and Taiwan Politics
- Economic Zones and Regional Development
- Asian Studies and History
- Insect-Plant Interactions and Control
- Arctic and Russian Policy Studies
- Socioeconomic Development in Asia
- International Development and Aid
Assiut University
2020-2024
Kentucky State University
2023-2024
University of Graz
2016-2022
This article presents managed honey bee colony loss rates over winter 2019/20 resulting from using the standardised COLOSS questionnaire in 37 countries. Six countries were outside Europe, including, for first time this series of articles, New Zealand. The 30,491 beekeepers Zealand reported 4.5% colonies with unsolvable queen problems, 11.1% dead after and 2.6% lost through natural disaster. gave an overall rate 18.1%, higher than previous year. varied greatly between countries, 7.4% to...
We examined the consumption rate of protein diets in caged and free-flying honey bees, amino acid composition diets, diet effects on gland development. The effect seven different (sugar solution only, Feedbee®, Helianthus pollen, Sinapis Asparagus Castanea mixed pollen diet) development hypopharyngeal (HPG) glands (AG) was tested bees. Caged bees consumed mainly at age 1–8 days, with highest day 3. Different affected both glands. acini HPG attained their maximum size an 5 days. Bees fed sp.,...
We investigated the importance of protein nutrition for honey bee immunity. Different diets (monofloral pollen Helianthus spp., Sinapis Asparagus Castanea a mixture four different and substitute FeedbeeTM) were fed to bees in cages ad libitum. After 18 days feeding, apidaecin 1 isoforms concentration thorax measured using nanoflow liquid chromatography coupled with mass spectrometry. Expression levels genes, coding apidaecins abaecin abdomen determined quantitative PCR. The results indicate...
We investigated the effect of adult honey bee pollen nutrition on flight performance bees. Therefore, caged bees were allowed to perform 30 min defecation/training flights every second day before pollen-fed and pollen-deprived older than 16 days compared in a mill. first fed 10 µL 1 M glucose solution bees, after they metabolized this during flight, 2 for test. Pollen-deprived flew longer further both flights. Pollen-fed faster early period at beginning flights, whereas final phases. able...
Abstract In bee diets, nectar is the primary source of carbohydrates. During scarcity flora, such as in winter, beekeepers typically provide supplemental sugar syrup a substitute. We examined four types sugars (sucrose, fructose, glucose, and mixture fructose glucose) on longevity, appetitive, their impact pollen digestion. The results showed that sucrose glucose had extended longevity cages. Bees preferred at 50% concentration since they consumed more than other cages multiple-choice test...
To enhance the performance of honey bee colonies and to improve physiological characteristics workers in late winter early spring (dearth period) Assiut region, Upper Egypt—three pollen substitutes rich protein available local market were used compared with bread as a control. The administrated at 7-day intervals for 15 wk, from December 2018 March 2019. rate food consumption, sealed brood areas, population size, hemolymph individuals measured. Stored was best source developing colonies,...
Application of pesticides can have a negative impact on pollinating honey bees, Apis mellifera L., ranging from sublethal to lethal concentrations.Consequently, it is important comprehend any possible impacts pesticides.Herein, we evaluated the toxicity specific (Sulfoxaflor, thiamethoxam, imidacloprid, and acetamiprid) A. workers after exposure 24, 48, 72, 96 hrs under laboratory conditions.As result, sulfoxaflor was considered most toxic compound among tested 24-h exposure.Further,...
This paper analyzes the constraints, practices, and opportunities of Egypt’s development. Egypt experienced economic stagnation under regime President Hosni Mubarak which was exacerbated by political situation that resulted from its end. efforts stalled it not until end power struggle between Muslim Brotherhood Egyptian Army, during counterrevolutionary period, normalcy returned to extent needed focus on improvements domestic situation. phase in election Abdel Fatah El-Sisi whose...
Some factors affecting bee venom extraction by electrical impulses directly from honey colonies were studied.Two experiments conducted during the summer months to study effect of defensive response degree, colony strength level, and season time collection.Twenty-four carniolan hybrid used.The results revealed that was depended on collection.When number stings par determined, related frames covered with bees.Bee amount which weakly extracted significantly differed (July August).From...
The present study was carried out in two regions of Upper Egypt, (Assiut and Sohag governorates) to verify qualitative quantitative pollen types on the bodies honey bee foragers through body surface analysis. It conducted by taking weekly samples incoming nectar foragers, collected directly from apiaries, during blooming season (from March September). divided into three periods as follows: first period (early spring: April), second (late May June), third (summer: July results showed that,...
This paper examines Japan’s role in balancing power dynamics and reshaping Asian relations Southeast Asia. Japan significantly affects the socioeconomic, political, security paradigms region. has engaged nations by creating strong economic ties opening markets for Japanese products. Thailand, Philippines, Vietnam, Singapore, Indonesia are among most prominent, to name a few. These states, addition to, Taiwan, Malaysia Brunei, have conflicting claims with China over sovereignty resources...
From late autumn until the end of winter conditions, bees are exposed to many stress factors including low air temperature and several pathogens.This study aimed estimate effects three commercial materials (acetylsalicylic acid, Echinacea purpurea extract, vitamin (C) mixed with sugar feeding on some parameters related tolerance using laboratory field tests.The tests supported potential role C extract enhance ability temperatures.The most promising results for recovery time after exposure...
Several pesticides may be directly responsible for reducing the performance and losses of honeybee colonies.The action feeding a nursing worker sugar solution with sublethal concentration seven pesticide groups was evaluated under laboratory conditions.Various physiological characteristics honeybees including food consumption, development glands, body water content, reserves were considered as indications functional status workers.Food consumption rate significantly reduced in all treatments...
Abstract Recent studies have shown negative sublethal effects of the microbial bioinsecticides, spinosad (Spd) and spinetoram (Spm) on honeybees concern behavioral effects; only a few physiological effects. Therefore, under laboratory conditions we investigated Spd Spm food consumption, hypopharyngeal glands (HPG) development activity in nursing honeybee workers. We introduced newly emerged worker into cages provided sugar solution pollen dough ad libitum. Insecticides (Spd Spm) were...