Browsing by Author "Abdelkader, Faten Ben"

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Efficacy of essential oils of thymbra capitata l. and mentha pulegium l. collected in tunisia on larvae of Galleria mellonella L.
(Bursa Uludağ Üniversitesi, 2021-04-08) Ncibi, Sarra; Amor, Abir Ben; Abdelkader, Faten Ben
The wax moth is one of the honeybee pests that cause a lot of damage and loss for the beekeepers in Tunisia. The use of insecticides is more and more used although they are known to contaminate wax and honey. This study aims to test the essential oils of two North African common plants Thymbra capitata L. and Mentha pulegium L. efficacy as alternative method by fumigation on instars of Galleria mellonela L. We also determined the duration of the development stages of the great wax moth (GWM) presented in Tunisia. Results showed that under a temperature ranged between 30 and 33°C, the total duration from eggs to adults of GWM lasted 51 days. The fumigant test showed the toxicity of both oils on larvae instars tested. The second larvae instar was more susceptible than the 4th instar. Moreover, M. pulegium was more toxic against the 2nd larvae instar than T. capitata with an LC50 at 48h of 41.82 and 456.27 µl/L air, respectively. The essential oils present a good alternative to the insecticides to control wax moths.
Impact of pesticides on honeybee (apis mellifera l.) drones
(Bursa Uludağ Üniversitesi, 2019-10-23) Abdelkader, Faten Ben; Bursa Uludağ Üniversitesi/Arıcılık Geliştirme Uygulama ve Araştirma Merkezi.; 0000-0003-4063-5521
Published research about drones is far less extensive than either worker or queen bees because they do not contribute to pollination, brood or honey production. However, much of the reproductive quality of the queen, though, is a function of the mating success and quality of the drones. Besides, studies of drones could help in breeding programs by improving the efficiency and quality of mating. Drones whose reproductive competitiveness is affected by several environmental and in-hive factors during development or adulthood may contribute dead or suboptimal sperm to a queen. It can have severe negative consequences not only for the queen herself but for overall productivity and survival of her colony. Drones are very sensitive to acaricides and insecticides. Most of them have negative impacts not only on drone semen quality such as spermatozoid viability and concentration but also on drone production and their traits. We here review the studies that describe pesticide exposure that might influence drone fitness.