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Water hyacinth (Eichhornia crassipes): a review of its weed status in Ethiopia  [2005]

Rezene Fessehaie Ethiopian Weed Science Society, Addis Abeba (Ethiopia) [Corporate Author]

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Water hyacinth (Eichhornia crassipes [Martias] Solms) is considered to be the most serious weed in freshwater habitats in tropical and warm temperate areas worldwide, where it displaces native aquatic plant and animal communities. It causes substantial economic hardships and interferes with water uses. The weed obstructs electricity generation, irrigation, navigation, and fishing; increases water loss resulting from evapo-transpiration; and facilitates proliferation of such diseases as bilharzias. The occurrence of water hyacinth in Ethiopia was reported for the first time during 1965 in the Koka lake and the Awash river. Water hyacinth has been a major threat to the country's three hydroelectric stations located along the Awash river where it emerges from the Koka lake. The Ethiopian Electric Light and Power Authority (EELPA) has periodically taken action to remove the weed using human labor, and while pursuing this technique acquired moderate control at considerable cost, no fully effective and suitable control measures are available up to now. Infestations of water hyacinth in Ethiopia have also been manifested on large scale in many water bodies of the country in the Gambella area (Sobate, Baro, Gillo and Pibor rivers); the Abay river just south of Lake Tana; and Lake Ellen in the Rift Valley.

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Arem (Ethiopia)