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Neonicotinoid insecticide seed treatments are commonly used in rice (Oryza sativa) production to control rice water weevil (Lisorhoptrus oryzophilus). With the use of neonicotinoid seed treatments, there is potential that honey bees (Apis mellifera) could be exposed to neonicotinoids through translocation to the pollen. Studies were conducted in 2015 and 2016 to determine the level of neonicotinoids present in flag leaves, pollen, and grain of rice. Thiamethoxam was applied as a seed treatment and foliar prior to flooding. Clothianidin was applied as a seed treatment and as a foliar at a preflood and postflood timing. Subsamples of flag leaves, pollen, and grain were analyzed for positive neonicotinoid detections and abundance. Thiamethoxam was detected in 8.9% of samples and clothianidin was detected in 1.4% of samples. For both thiamethoxam and clothianidin, more positive samples were observed in flag leaf samples than in pollen or grain. An average of 4.30 ng/g of thiamethoxam was detected in flag leaves from seed-applied thiamethoxam. An average of 1.25 ng/g of clothianidin was found in flag leaves from a preflood application of clothianidin. A survey of honey bees present in rice fields was conducted in Mississippi and Arkansas to determine the abundance of honey bees present in rice fields based on the time of day. Honey bee densities were low in rice, with less than 5% and 3% positive detections observed in Mississippi and Arkansas, respectively. More positive detections and higher densities of honey bees were observed for mid-day sampling than for morning or evening sampling.
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http://dx.doi.org/10.1093/ee/nvae057 | DOI Listing |
Sci Total Environ
December 2024
Sociedad Latinoamericana de Investigación en Abejas (SoLatInA), Montevideo, Uruguay; Laboratorio de Microbiología y Salud de las Abejas, Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Avda. Italia 3318, Montevideo, Uruguay; Centro de Investigación en Ciencias Ambientales (CICA), Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Avda. Italia 3318, Montevideo, Uruguay. Electronic address:
Stingless bees (tribe Meliponini), comprising over 600 known species within the largest group of eusocial bees, play a critical role in ecosystem functioning through their pollination services. They contribute to the reproduction of numerous plant species, including many economically important crops such as cacao, coffee, and various fruits. Beyond their ecological significance, stingless bees hold cultural and economic importance for many native and rural communities, where they are managed for their honey, pollen, and propolis for nutritional and health purposes.
View Article and Find Full Text PDFJ Med Food
December 2024
Escola de Artes, Ciências e Humanidades, University of São Paulo (EACH-USP), São Paulo, Brazil.
Stingless bee honey is a natural product consisting of sugars, organic acids, proteins, minerals, vitamins, phenolic compounds, and flavonoids. Due to its healing properties, honey is often used in phytotherapy and for homemade syrups. The search for natural therapeutic alternatives has been an increasing trend in recent years, mainly due to the side effects of artificial drugs and increasing antibiotic resistance.
View Article and Find Full Text PDFVet Res Commun
December 2024
Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, 23119, Elazıg, Türkiye.
Varroa species, commonly known as the honey bee mites, poses a significant challenge to the worldwide beekeeping industry. The aim of this study was to investigate the effect of haplotype variation on morphology of Varroa destructor. Forty-one apiaries across Bingol province (Türkiye) and its districts were visited using random sampling to examine 2440 honey bee colonies.
View Article and Find Full Text PDFSci Total Environ
December 2024
Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USA; Department of Plant Pathology, Entomology and Microbiology, Iowa State University, Ames, IA, USA. Electronic address:
Health and population status of bees is negatively affected by anthropogenic stressors, many of which co-occur in agricultural settings. While pollinator habitat (often involving plantings of native forbs) holds promise to benefit both managed and wild bees, important issues remain unresolved. These include whether conventional, broad-spectrum insecticide use negates these benefits and how non-native, managed honey bees affect wild bees in these areas.
View Article and Find Full Text PDFMicrob Pathog
December 2024
Yunnan Provincial Key Laboratory of Entomological Biopharmaceutical R&D, College of Pharmacy, Dali University, Dali, Yunnan, PR China; National-Local Joint Engineering Research Center of Entomoceutics, Dali, PR China. Electronic address:
The medicinal beetle Blaps rynchopetera is recognized for its antibacterial, anti-inflammatory, and immune-regulating properties. This study utilized metaviromics technology to systematically characterize the viral community within the gut of B. rynchopetera through high-throughput sequencing of gut contents, with a specific focus on the composition of its bacteriophage community.
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