Honeybee losses have been attributed to multiple stressors and factors including the neonicotinoid insecticides (NIs). Much of the study of hive contamination has been focused upon temperate regions such as Europe, Canada and the United States. This study looks for the first time at honey, pollen and bees collected from across the Nile Delta in Egypt in both the spring and summer planting season of 2013. There is limited information upon the frequency of use of NIs in Egypt but the ratio of positive identification and concentrations of NIs are comparable to other regions. Metabolites of NIs were also monitored but given the low detection frequency, no link between matrices was possible in the study. Using a simple hazard assessment based upon published LD50 values for individual neonicotinoids upon the foraging and brood workers it was found that there was a potential risk to brood workers if the lowest reported LD50 was compared to the sum of the maximum NI concentrations. For non-lethal exposure there was significant risk at the worst case to brood bees but actualexposure effects are dependant upon the genetics and conditions of the Egyptian honeybee subspecies that remain to be determined.
Neonicotinoid insecticides in pollen, honey and adult bees
Dr. Yahya Al Naggar, lecturer and research associate of Entomology at Zoology Department, Faculty of Science, Tanta University, Egypt. Currently, he is AvH postdoc fellow at institute of General Biology, Martin Luther University. He has published 24 peer-reviewed journal articles (7 articles in 2018). A total of 17 abstracts have been presented at local and international, scientific conferences. Additionally, he has been awarded the scientific publication award several times from Tanta University, Egypt (twice in 2018). In 2016, he has been awarded the gold medal for best oral presentation at the 13th Asian apicultural association conference (Jeddah, Kingdom of Saudi Arabia). He is interested to unravel the causes of colony collapse disorders (CCD). He is conducting lab and field experiments to test whether novel insecticides that are targeting the nicotinic acetylcholine receptor of insects is also harmful to honeybees as well as in their interaction with other stressors. Such knowledge is key for pollinator health and key to safeguard food security into the future.