Nosema ceranae Winter Control: Study of the Effectiveness of Different Fumagillin Treatments and Consequences on the Strength of Honey Bee (Hymenoptera: Apidae) Colonies
Overview: In Uruguay, colonies of honey bees moving to Eucalyptus grandis plantation in autumn habitually become infected with the microsporidian Nosema ceranae , a parasite that attacks the digestive system of bees. Beekeepers attributed to N. ceranae depopulation of the colonies that often occurs...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1938291X_v110_n1_p1_Mendoza http://hdl.handle.net/20.500.12110/paper_1938291X_v110_n1_p1_Mendoza |
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paper:paper_1938291X_v110_n1_p1_Mendoza2023-06-08T16:32:10Z Nosema ceranae Winter Control: Study of the Effectiveness of Different Fumagillin Treatments and Consequences on the Strength of Honey Bee (Hymenoptera: Apidae) Colonies antibiotic Apis mellifera Eucalyptus Nosema ceranae nosemosis cyclohexane derivative fumagillin fungicide sesquiterpene unsaturated fatty acid animal bee dose response drug effects Eucalyptus microbiology Nosema physiology population dynamics season Uruguay Animals Bees Cyclohexanes Dose-Response Relationship, Drug Eucalyptus Fatty Acids, Unsaturated Fungicides, Industrial Nosema Population Dynamics Seasons Sesquiterpenes Uruguay Overview: In Uruguay, colonies of honey bees moving to Eucalyptus grandis plantation in autumn habitually become infected with the microsporidian Nosema ceranae , a parasite that attacks the digestive system of bees. Beekeepers attributed to N. ceranae depopulation of the colonies that often occurs at the end of the blooming period, and many use the antibiotic fumagillin to reduce the level of infection. The aim of this study was to compare the effectiveness of four different fumagillin treatments and determine how this antibiotic affects the strength of the colonies during the winter season. The colonies treated with fumagillin in July showed less spore load at the end of applications, being the most effective the following treatments: the four applications sprayed over bees of 30 mg of fumagillin in 100 ml of sugar syrup 1:1, and four applications of 90 mg of fumagillin in 250 ml of sugar syrup 1:1 using a feeder. However, 2 month after the treatment applications, the colonies treated with fumagillin were the same size as the untreated colonies. In September, the colonies treated and not treated with fumagillin did not differ in colony strength (adult bee population and brood area) or spores abundance. Our study demonstrates that fumagillin treatment temporarily decreased the spore load of N. ceranae , but this was not reflected in either the size of the colonies or the probability of surviving the winter regardless of the dose or the administration strategy applied. Given the results obtained, we suggest to not perform the pharmacological treatment under the conditions described in the experiment. Resumen: En Uruguay las colonias de abejas melíferas que se trasladan a las forestaciones de Eucalyptus grandis en otoño indefectiblemente se infectan con el microsporido Nosema ceranae , parásito que ataca el sistema digestivo de las abejas. Los apicultores atribuyen a N. ceranae el despoblamiento de las colonias que ocurre con frecuencia al terminar el periodo de floración y muchos emplean el antibiótico fumagilina para reducir el nivel de infección. El objetivo de este estudio fue comparar la eficacia de cuatro tratamientos diferentes con fumagilina y determinar cómo incide en la fortaleza de las colonias durante la invernada. Las colonias tratadas con fumagilina en julio presentaron una menor carga de esporas al terminar las aplicaciones, siendo los tratamientos más eficaces el de 4 aplicaciones mediante asperjado sobre las abejas de 30 mg de fumagilina en 100 ml de jarabe de azúcar 1:1, y el de 4 aplicaciones de 90 mg de fumagilina en 250 ml de jarabe de azúcar 1:1 utilizando un alimentador. Sin embargo, durante el período de experimentación, las colonias tratadas con antibiótico presentaron igual tamaño que las colonias no tratadas. En setiembre, las colonias tratadas y no tratadas con fumagilina no se diferenciaron en la intensidad de infección ni en su tamaño. En las condiciones en que se realizó el estudio, la aplicación de fumagilina disminuyó temporalmente la carga de esporas de N. ceranae pero esto no se reflejó en el tamaño de las colonias ni en la probabilidad de sobrevivir el invierno. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1938291X_v110_n1_p1_Mendoza http://hdl.handle.net/20.500.12110/paper_1938291X_v110_n1_p1_Mendoza |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
antibiotic Apis mellifera Eucalyptus Nosema ceranae nosemosis cyclohexane derivative fumagillin fungicide sesquiterpene unsaturated fatty acid animal bee dose response drug effects Eucalyptus microbiology Nosema physiology population dynamics season Uruguay Animals Bees Cyclohexanes Dose-Response Relationship, Drug Eucalyptus Fatty Acids, Unsaturated Fungicides, Industrial Nosema Population Dynamics Seasons Sesquiterpenes Uruguay |
| spellingShingle |
antibiotic Apis mellifera Eucalyptus Nosema ceranae nosemosis cyclohexane derivative fumagillin fungicide sesquiterpene unsaturated fatty acid animal bee dose response drug effects Eucalyptus microbiology Nosema physiology population dynamics season Uruguay Animals Bees Cyclohexanes Dose-Response Relationship, Drug Eucalyptus Fatty Acids, Unsaturated Fungicides, Industrial Nosema Population Dynamics Seasons Sesquiterpenes Uruguay Nosema ceranae Winter Control: Study of the Effectiveness of Different Fumagillin Treatments and Consequences on the Strength of Honey Bee (Hymenoptera: Apidae) Colonies |
| topic_facet |
antibiotic Apis mellifera Eucalyptus Nosema ceranae nosemosis cyclohexane derivative fumagillin fungicide sesquiterpene unsaturated fatty acid animal bee dose response drug effects Eucalyptus microbiology Nosema physiology population dynamics season Uruguay Animals Bees Cyclohexanes Dose-Response Relationship, Drug Eucalyptus Fatty Acids, Unsaturated Fungicides, Industrial Nosema Population Dynamics Seasons Sesquiterpenes Uruguay |
| description |
Overview: In Uruguay, colonies of honey bees moving to Eucalyptus grandis plantation in autumn habitually become infected with the microsporidian Nosema ceranae , a parasite that attacks the digestive system of bees. Beekeepers attributed to N. ceranae depopulation of the colonies that often occurs at the end of the blooming period, and many use the antibiotic fumagillin to reduce the level of infection. The aim of this study was to compare the effectiveness of four different fumagillin treatments and determine how this antibiotic affects the strength of the colonies during the winter season. The colonies treated with fumagillin in July showed less spore load at the end of applications, being the most effective the following treatments: the four applications sprayed over bees of 30 mg of fumagillin in 100 ml of sugar syrup 1:1, and four applications of 90 mg of fumagillin in 250 ml of sugar syrup 1:1 using a feeder. However, 2 month after the treatment applications, the colonies treated with fumagillin were the same size as the untreated colonies. In September, the colonies treated and not treated with fumagillin did not differ in colony strength (adult bee population and brood area) or spores abundance. Our study demonstrates that fumagillin treatment temporarily decreased the spore load of N. ceranae , but this was not reflected in either the size of the colonies or the probability of surviving the winter regardless of the dose or the administration strategy applied. Given the results obtained, we suggest to not perform the pharmacological treatment under the conditions described in the experiment. Resumen: En Uruguay las colonias de abejas melíferas que se trasladan a las forestaciones de Eucalyptus grandis en otoño indefectiblemente se infectan con el microsporido Nosema ceranae , parásito que ataca el sistema digestivo de las abejas. Los apicultores atribuyen a N. ceranae el despoblamiento de las colonias que ocurre con frecuencia al terminar el periodo de floración y muchos emplean el antibiótico fumagilina para reducir el nivel de infección. El objetivo de este estudio fue comparar la eficacia de cuatro tratamientos diferentes con fumagilina y determinar cómo incide en la fortaleza de las colonias durante la invernada. Las colonias tratadas con fumagilina en julio presentaron una menor carga de esporas al terminar las aplicaciones, siendo los tratamientos más eficaces el de 4 aplicaciones mediante asperjado sobre las abejas de 30 mg de fumagilina en 100 ml de jarabe de azúcar 1:1, y el de 4 aplicaciones de 90 mg de fumagilina en 250 ml de jarabe de azúcar 1:1 utilizando un alimentador. Sin embargo, durante el período de experimentación, las colonias tratadas con antibiótico presentaron igual tamaño que las colonias no tratadas. En setiembre, las colonias tratadas y no tratadas con fumagilina no se diferenciaron en la intensidad de infección ni en su tamaño. En las condiciones en que se realizó el estudio, la aplicación de fumagilina disminuyó temporalmente la carga de esporas de N. ceranae pero esto no se reflejó en el tamaño de las colonias ni en la probabilidad de sobrevivir el invierno. |
| title |
Nosema ceranae Winter Control: Study of the Effectiveness of Different Fumagillin Treatments and Consequences on the Strength of Honey Bee (Hymenoptera: Apidae) Colonies |
| title_short |
Nosema ceranae Winter Control: Study of the Effectiveness of Different Fumagillin Treatments and Consequences on the Strength of Honey Bee (Hymenoptera: Apidae) Colonies |
| title_full |
Nosema ceranae Winter Control: Study of the Effectiveness of Different Fumagillin Treatments and Consequences on the Strength of Honey Bee (Hymenoptera: Apidae) Colonies |
| title_fullStr |
Nosema ceranae Winter Control: Study of the Effectiveness of Different Fumagillin Treatments and Consequences on the Strength of Honey Bee (Hymenoptera: Apidae) Colonies |
| title_full_unstemmed |
Nosema ceranae Winter Control: Study of the Effectiveness of Different Fumagillin Treatments and Consequences on the Strength of Honey Bee (Hymenoptera: Apidae) Colonies |
| title_sort |
nosema ceranae winter control: study of the effectiveness of different fumagillin treatments and consequences on the strength of honey bee (hymenoptera: apidae) colonies |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1938291X_v110_n1_p1_Mendoza http://hdl.handle.net/20.500.12110/paper_1938291X_v110_n1_p1_Mendoza |
| _version_ |
1768546512649846784 |