Publications by authors named "Ihor Dvylyuk"
The normal developmental anatomy and histology of the reproductive tract of the honey bee drone, Apis mellifera (Linnaeus, 1758), has been well documented. The post-emergence maturation changes of the accessory glands are likewise well understood, but the normal histological changes of the testicle undergoing physiologic atrophy are not well characterized. To address this knowledge gap, herein we describe the anatomy and sequential histological stages of normal testicular atrophy of drones sampled daily from emergence to sexual maturity in the spring (June) and early summer (July).
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- Honey bee colony productivity relies on queen health, which can be negatively impacted by neonicotinoid exposure, potentially due to direct toxicity or poor care from affected worker bees.
- The study tested the effects of incremental doses of the neonicotinoid thiamethoxam (THI) on honey bee queens, finding that exposure reduced the size of their mandibular glands and subsequently may affect their ability to produce pheromones.
- Additionally, exposure to THI led to decreased larval and pupal survival and lower sperm viability, potentially hindering queen development and reproductive longevity.
Overwinter colony mortality is an ongoing challenge for North American beekeepers. During winter, honey bee colonies rely on stored honey and beebread, which is frequently contaminated with the neonicotinoid insecticides clothianidin and thiamethoxam. To determine whether neonicotinoid exposure affects overwinter survival of L.
View Article and Find Full Text PDFBackground: Chronic exposure of honey bees (Apis mellifera Linnaeus) to the neonicotinoid thiamethoxam and the fungicide prothioconazole is common during foraging in agricultural landscapes. We evaluated the survival and hypopharyngeal gland development of adult worker honey bees, and the survival of the worker brood when chronically exposed to thiamethoxam or thiamethoxam and prothioconazole in combination.
Results: We found that 30 days of exposure to 40 μg kg of thiamethoxam significantly (P < 0.
Deformed wing virus (DWV) is a single-stranded RNA virus of honey bees ( L.) transmitted by the parasitic mite Although DWV represents a major threat to honey bee health worldwide, the pathological basis of DWV infection is not well documented. The objective of this study was to investigate clinicopathological and histological aspects of natural DWV infection in honey bee workers.
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