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Evaluating the Toxicity Effect of Euphorbia Contifolia on Honey Bees (Apis mellifera) at Field Condition
International Journal of Ecotoxicology and Ecobiology
Volume 2, Issue 4, December 2017, Pages: 145-149
Received: Aug. 18, 2017; Accepted: Aug. 30, 2017; Published: Sep. 26, 2017
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Authors
Alemayehu Gela, Oromia Agriculturalral Research Institute, Holeta Bee Research Center, Holeta, Ethiopia
Taye Negara, Oromia Agriculturalral Research Institute, Holeta Bee Research Center, Holeta, Ethiopia
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Abstract
The recent decline of honey bee population raises speculations from different angles. Exposure to poisoning substances is proposed as prime factor for honeybee deaths and colony reduction. Euphorbia contifolia, commonly known as “key abeba” is suspected as poisonousplant to honeybees and other animals in different regions of Ethiopia. An attempt was made to test the phytotoxic effect of this plant on honeybees in Illubabora and Jimma zones of Oromia region. Questioner survey and controlled experiment were used to assess the effect of E.contifolia on honeybees during its flowering season. Data on numberof dead adult bees and bee broods were counted at every 3hr, 4hr, 5hr, 6hr and 12hr of the day for five consecutive days. The survey result indicates that anaverage of 52% of the respondents of the two zones suspected that E. contifolia causes death and narcosis of foraging bees. In contrast, the mean mortality rate of adult and brood bees between the treatment and control group did not significantly differ (P >0.05), and no any narcosis symptom observed during the experimental test. This demonstratesthe absence of distinct toxic effect of the plant on honeybees. However, further study on the plant’s nectar and pollen active compound is recommended to reach into full understanding.
Keywords
Honeybees, E. Contifolia, Toxicity, Nectar, Pollen, Narcosis
To cite this article
Alemayehu Gela, Taye Negara, Evaluating the Toxicity Effect of Euphorbia Contifolia on Honey Bees (Apis mellifera) at Field Condition, International Journal of Ecotoxicology and Ecobiology. Vol. 2, No. 4, 2017, pp. 145-149. doi: 10.11648/j.ijee.20170204.12
Copyright
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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