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	Provedor de dados OceanDocs (3) Autor Njoka, S.W. (3) Ochiel, G.R.S. (3) Gitonga, W. (2) Mailu, A.M. (2) Manyala, J.O. (1) Okeyo Owuor, J.B. (1) Mais... Palavra-chave AQUATIC WEEDS (1) Aquatic insects (1) BIOLOGICAL CONTROL (1) Biological control (1) Biological development (1) Entomology (1) Environment management (1) HYACINTH (1) Http://aims.fao.org/aos/agrovoc/c_4317 (1) Http://aims.fao.org/aos/agrovoc/c_918 (1) Http://aims.fao.org/aos/agrovoc/c_921 (1) Insect eggs (1) KENYA Freshwater plants Aquatic weeds Water hyacinth http://aims.fao.org/aos/agrovoc/c_15267 (1) LAKE VICTORIA (1) Lake Victoria Environmental conditions Environmental effects Environmental impact Environmental protection Resource management Socioeconomic aspects Environmental impact Environmental conditions Environmental protection Resource management http://aims.fao.org/aos/agrovoc/c_24420 http://aims.fao.org/aos/agrovoc/c_32980 http://aims.fao.org/aos/agrovoc/c_15898 http://aims.fao.org/aos/agrovoc/c_6524 (1) Life cycle (1) Plant control (1) Survival (1) Winam Gulf (1) Mais... Tipo do documento Proceedings Paper (3) Ano 2006 (1) 2000 (1) 1998 (1) País Belgium (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última The life history and survival of Neochetina in Lake Victoria basin: Basis for biological weed control OceanDocs Ochiel, G.R.S.; Njoka, S.W.; Manyala, J.O.; Okeyo Owuor, J.B.. Using our own experimental data and published data, we review information on the control process of water hyacinth and its status in Lake Victoria basin, Kenya. Experimental results show that the mean fecundity of the two weevils is 290 and 237 eggs per female laid over a period of 16 weeks, with an adult longevity of 98 and 112 days for Neochetina bruchi and N. eichhorniae respectively. There was significant difference between the egg laying capacities of the two weevil species (p=0.002). The survival rate of the two species was significantly different (p<0.05) for all life stages except for larvae to pupa. There was no significant interaction between the species and the method of experimental egg setting (p<0.05). The fecundity of both N. bruchi... Tipo: Proceedings Paper Palavras-chave: Biological development; Life cycle; Plant control; Biological control; Aquatic insects; Insect eggs; Entomology; Environment management; Survival; Biological control; Biological development; Life cycle; Http://aims.fao.org/aos/agrovoc/c_918; Http://aims.fao.org/aos/agrovoc/c_921; Http://aims.fao.org/aos/agrovoc/c_4317. Ano: 2006 URL: http://hdl.handle.net/1834/1498 Biological control of water hyacinth on Lake Victoria, Kenya OceanDocs Ochiel, G.R.S.; Mailu, A.M.; Gitonga, W.; Njoka, S.W.. The Kenya Agricultural Research Institute (KARI) imported 12 800 curculionid weevils (Neochetina spp.) from Benin, Uganda, South Africa and Australia for biological control of water hyacinth between 1993 and1998. In 1996, KARI’s rearing and quarantine facility at the National Agricultural Research Centre, Muguga, provided initial “breeding stock” to another rearing facility at the National Fibre Research Centre, Kibos, near Lake Victoria. To date, 36 500 weevils and 42 000 weevil eggs have been produced from Kibos. About 2000 weevils were produced each month from plants grown in plastic basins, galvanized corrugated iron sheet tanks and a polypropylene rearing pool. Between January 1997 and August 1998, KARI released 36 250 Neochetina weevils at 27 sites... Tipo: Proceedings Paper Palavras-chave: AQUATIC WEEDS; HYACINTH; BIOLOGICAL CONTROL; LAKE VICTORIA; KENYA Freshwater plants Aquatic weeds Water hyacinth http://aims.fao.org/aos/agrovoc/c_15267. Ano: 1998 URL: http://hdl.handle.net/1834/1275 Water hyacinth: an environmental disaster in the Winam Gulf of Lake Victoria and its control OceanDocs Ochiel, G.R.S.; Mailu, A.M.; Gitonga, W.; Njoka, S.W.. Water hyacinth has in the recent past had an adverse socio-economic impact on the lakeshore communities of Lake Victoria, particularly in the Winam Gulf. Fishing, lake transport and water supply have been seriously affected by the water hyacinth. KARI’s efforts at mitigating this disaster have so far been in the form of a twopronged management strategy consisting of physical and biological measures. The local administration has been involved in mobilizing the local communities to remove water hyacinth manually at strategic sites. However, there have been a number of constraints, mainly community attitudes to self-help activities. The Kenya Industrial Research and Development Institute (KIRDI) has developed a prototype mechanical harvester in a KARI-funded... Tipo: Proceedings Paper Palavras-chave: Winam Gulf; Lake Victoria Environmental conditions Environmental effects Environmental impact Environmental protection Resource management Socioeconomic aspects Environmental impact Environmental conditions Environmental protection Resource management http://aims.fao.org/aos/agrovoc/c_24420 http://aims.fao.org/aos/agrovoc/c_32980 http://aims.fao.org/aos/agrovoc/c_15898 http://aims.fao.org/aos/agrovoc/c_6524. Ano: 2000 URL: http://hdl.handle.net/1834/1281 Registros recuperados: 3 Primeira ... 1 ... Última

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