Evaluación de efectos letales de insumos agrícolas en abejas melíferas (Apis mellifera).

The intensive use of agricultural supplies (foliar fertilizers, fungicides, and insecticides) is currently causing the population reduction of honeybees, causing an imbalance in ecosystems. The aim of this research was to evaluate the lethal effects of agricultural supplies (Evergreen, Energy Track, Oxithane, and Imidalaq) on honeybees (Apis mellifera L.). The research was carried out in the Chemistry and Biochemistry laboratory located in the experimental Campus "La María" belonging to the Universidad Técnica Estatal de Quevedo. Bioassays of food consumption, mortality and mean lethal time was carried out. For each bioassay, a DCA with 5 treatments was used, the experimental unit consisted of 10 bees (EU). Five treatments were studied; Evergreen (T1); Energy Track (T2) foliar fertilizers; Imidalaq SC insecticide (T3); the fungicide Oxhitane (T4) and the control treatment (liquid sucrose) (T5). According to the results obtained, significant differences were evidenced between the treatments during the first 36 hours of exposure. The lowest feed intake was for the treatment in which the bees were fed Energy-Track (X̄=0.25 g), Imidalaq (X̄=0.29 g), and Oxithane (X̄=0.44 g), compared to the control treatment (Sucrose) (X̄=0.56 g). Except for the control treatment (T5= 4 bees), at 36 hours of evaluation, the highest mortality among treatments occurred (T1= 8 bees; T2= 19 bees; T3=9 bees; T4= 20 bees). The highest percentage of bee mortality was obtained when exposed to the insecticide Imidalaq (T4) and the foliar fertilizer Energy Track (T2) with mortality rates of 50% and 47.5%, respectively. The Imidalaq insecticide obtained the lowest TL50 value (33.60 hours). This research was carried out with the aim of generating information for farmers and beekeepers in the area on the effects of these products on bees in the region and their consequences on the reduction of bee populations.

• Hlavní autor: Haón Ramírez, Juliana Daniela (author)
• Médium: bachelorThesis
• Jazyk: spa
• Vydáno: 2022
• Témata: Mortalidad,; Polinizadores,; Agroecosistemas; Pesticidas
• On-line přístup: https://repositorio.uteq.edu.ec/handle/43000/6660