Search Results for: Honey Bee
Does Cry1Ab protein affect learning performances of the honey bee Apis mellifera L. (Hymenoptera, Apidae)?
Abstract: Genetically modified Bt crops are increasingly used worldwide but side effects and especially sublethal effects on beneficial insects remain poorly studied. Honey bees are beneficial insects for natural and cultivated ecosystems through pollination. The goal of the present study was to assess potential effects of two concentrations of Cry1Ab protein (3 and 5000 ppb) …
Quantification of toxins in a Cry1Ac+ CpTI cotton cultivar and its potential effects on the honey bee Apis mellifera L.
Abstract: Transgenic Cry1Ac + CpTI cotton (CCRI41) is increasingly planted throughout China. However, negative effects of this cultivar on the honey bee Apis mellifera L., the most important pollinator for cultivated ecosystem, remained poorly investigated. The objective of our study was to evaluate the potential side effects of transgenic Cry1Ac + CpTI pollen from cotton …
Cell death localization in situ in laboratory reared honey bee (Apis mellifera L.) larvae treated with pesticides
Abstract: In this study, cell death detected by DNA fragmentation labeling and phosphatidylserine (PS) localization was investigated in the honey bee (Apis mellifera L.) midgut, salivary glands and ovaries after treating larvae with different pesticides offered via an artificial diet. To do this, honey bee larvae reared in an incubator were exposed to one of …
Transgenic soybean pollen (Glycine max L.) in honey from the Yucatán peninsula, Mexico
Abstract: Using precise pollen species determination by conventional microscopic methods, accompanied by molecular genetic markers, we found bees collect GMO (genetically modified) soybean pollen and incorporate it in Yucatan honey. Honey comb samples from Las Flores, Campeche, Mexico, often contained soybean pollen. Pollen in honey was analyzed in nine samples; six contained substantial soy pollen …
Behavioral responses of honey bees (Apis mellifera) to natural and synthetic xenobiotics in food
Abstract: While the natural foods of the western honey bee (Apis mellifera) contain diverse phytochemicals, in contemporary agroecosystems honey bees also encounter pesticides as floral tissue contaminants. Whereas some ubiquitous phytochemicals in bee foods up-regulate detoxification and immunity genes, thereby benefiting nestmates, many agrochemical pesticides adversely affect bee health even at sublethal levels. How honey …
Survey of glyphosate residues in honey, corn and soy products
Abstract: Samples of honey (sixty nine), pancake and corn syrup (twenty six), soy sauce (twenty eight), soy milk (eleven), and tofu (twenty) purchased in the Philadelphia, US metropolitan area were analyzed for glyphosate residue using ELISA. The limit of quantification (LOQ)and range of the method were determined for honey, pancake syrup, and corn syrup to …
A honey‐sealed alliance: Mayan beekeepers in the Yucatan Peninsula versus transgenic soybeans in Mexico’s last tropical forest
Abstract: The peasant economy of the Yucatan Peninsula is sustained by agriculture and beekeeping. Honey production has great economic importance, given that it represents the main source of income for Mayan rural families. Furthermore, Mexico is the world’s fourth‐largest exporter of honey. The honey comes from jungle that covers the peninsular territory and forms part …
Effects of realistic doses of atrazine, metolachlor, and glyphosate on lipid peroxidation and diet-derived antioxidants in caged honey bees (Apis mellifera)
Abstract: The decline in the population of pollinators is a worrying phenomenon worldwide. In North America, the extensive use of herbicides in maize and soya crops may affect the health of nontarget organisms like the honey bee. In this study, caged honey bees were exposed to realistic doses of atrazine, metolachlor, and glyphosate for 10 …
In silico identification of off-target pesticidal dsRNA binding in honey bees (Apis mellifera)
Abstract: Background Pesticidal RNAs that silence critical gene function have great potential in pest management, but the benefits of this technology must be weighed against non-target organism risks. Methods Published studies that developed pesticidal double stranded RNAs (dsRNAs) were collated into a database. The target gene sequences for these pesticidal RNAs were determined, and the …
European ruling raises specter of mandatory GM pollen tests on honey
Text: Honey producers may be forced to test for exposure to genetically modified (GM) pollen after a decision from the high court of the European Union (EU) in Luxembourg. The court ruled in September that honey found to contain traces of pollen from GM corn must receive regulatory approval before it can be sold in …
The importance of weeds as melliferous flora in central Chile
Abstract: The use of native flora by Apis mellifera L. in Chile has been demonstrated in many studies; however, certain species that are viewed as weeds contribute extensively to the floral composition of honey. A total of 92 honey samples from the Libertador General Bernardo O’Higgins region in Chile were analyzed to determine which weeds …
Identifying the role of glyphosate-containing herbicides on honeybee mortality rates and colony collapse disorder
Abstract: The world food supply and economy are directly dependent upon the pollination of crops and plants by honeybees. Due to the recently discovered condition known as Colony Collapse Disorder, the world honeybee population has declined significantly since 2006 (Kaplan 2008). It is estimated that one-third of all food in the human diet is dependent …
Flower‐visiting insects and their potential impact on transgene flow in rice
Abstract: Rice is one of the most important crops in the world. Several transgenic varieties of rice have been developed, and some have recently entered pre‐production trials. One concern with genetically modified (GM) crops is transgene escape, but prior studies suggest this risk is low for rice because it is self‐pollinated and the dispersal of pollen …
The herbicide glyphosate negatively affects midgut bacterial communities and survival of honey bee during larvae reared in vitro
Abstract: Effects of glyphosate on survival, developmental rate, larval weight, and midgut bacterial diversity of Apis mellifera were tested in the laboratory. Larvae were reared in vitro and fed diet containing glyphosate 0.8, 4, and 20 mg/L. The dependent variables were compared with negative control and positive control (dimethoate 45 mg/L). Brood survival decreased in 4 …
Monitoring of Bt-maize pollen exposure in the vicinity of the nature reserve Ruhlsdorfer Bruch in northeast Germany 2007 to 2008
Abstract: Background, aim, and scope: Basically, technological innovations are associated with benefits and risks. This is also true for the introduction of genetically modified organisms (GMO) into agriculture. In Germany, precautionary regulations currently demand isolation distances (i. e. buffer zones) for the cultivation of genetically modified maize (Bt-maize) in the vicinity of conventional (150 m) and organic …
Effects of field-realistic doses of glyphosate on honeybee appetitive behaviour
Abstract: Glyphosate (GLY) is a broad-spectrum herbicide used for weed control. The sub-lethal impact of GLY on non-target organisms such as insect pollinators has not yet been evaluated. Apis mellifera is the main pollinator in agricultural environments and is a well-known model for behavioural research. Honeybees are also accurate biosensors of environmental pollutants and their …
Effects of Cry1Ab protoxin, deltamethrin and imidacloprid on the foraging activity and the learning performances of the honeybee Apis mellifera, a comparative approach
Abstract: In a comparative approach, we evaluated the effects of Cry1Ab protoxin, deltamethrin and imidacloprid insecticides on mortality, syrup consumption, foraging activity and olfactory learning capacities of free-flying honeybees. In an indoor flight cage we exposed bee colonies to different syrups containing Cry1Ab protoxin, deltamethrin or imidacloprid at 1000 mu g/kg, 500 mu g/kg and …
