Effects of thiamethoxam on brain structure of Bombus terrestris (Hymenoptera: Apidae) workers
Küçük Resim Yok
Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Neonicotinoids are the most widely used pesticide compared to other major insecticide classes known worldwide and have the fastest growing market share. Many studies showed that neonicotinoid pesticides harm honeybee learning and farming activities, negatively affect colony adaptation and reduce pollination abilities. Bumblebees are heavily preferred species all over the world in order to ensure pollination in plant production. In this study, sublethal effects of the neonicotinoid insecticide thiamethoxam on the brain of Bombus terrestris workers were analyzed. Suspensions (1/1000, 1/100, 1/10) of the maximum recommended dose of thiamethoxam were applied to the workers. 48 h after spraying, morphological effects on the brains of workers were studied. According to area measurements of ICC's of Kenyon cells, there was a significant difference between 1/10 dose and all groups. On the other hand, areas of INC's of Kenyon cells showed a significant difference between the control group and all dose groups. Neuropil disorganization in the calyces increased gradually and differed significantly between the groups and was mostly detected at the highest dose (1/10). Apart from optic lobes, pycnotic nuclei were also observed in the middle region of calyces of mushroom bodies in the high dose group. Also, the width of the lamina, medulla and lobula parts of the optic lobes of each group and the areas of the antennal lobes were measured and significant differences were determined between the groups. The results of the study revealed that sublethal doses of thiamethoxam caused some negative impacts on brain morphology of B. terrestris workers. © 2023 Elsevier Ltd
Açıklama
Anahtar Kelimeler
Bombus terrestris, Kenyon cells, Mushroom bodies, Optic lobes, Thiamethoxam, Antenna lobes, Competition, Farms, Bombu terrestri, Brain structure, High dose, Hymenoptera, Kenyon cell, Mushroom bodies, Neonicotinoids, Optic lobe, Thiamethoxam, Workers', Insecticides, thiamethoxam, insecticide, neonicotinoid, nitro derivative, pesticide, thiamethoxam, bee, brain, market, mushroom, pesticide application, pollination, thiamethoxam, animal cell, animal experiment, animal model, animal structures, animal tissue, antenna (organ), Article, Bombus terrestris, brain, calyx, comparative study, controlled study, disorientation, histopathology, kenyon cell, morphological trait, mushroom body, neuropil, nonhuman, optic lobe, pesticide spraying, sublethal dose, suspension, worker (insect), animal, bee, brain, Hymenoptera, sponge (Porifera), Animals, Bees, Brain, Hymenoptera, Insecticides, Neonicotinoids, Nitro Compounds, Pesticides, Porifera, Thiamethoxam
Kaynak
Chemosphere
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
338
