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REFERENCES


Barrett, S.C.H. & Forno, I.W. 1982. Style morph distribution in New World populations of Eichhornia crassipes (Mart.) Solms-Laubach (water hyacinth). Aquatic Botany 13: 299-306.

Cordo, H.A., DeLoach, J.C. & Ferrer, R. 1981. Biological studies on two weevils, Ochatina bruchi and Onychylis cretatus, collected from Pistia and other aquatic plants in Argentina. Ann. Entom. Soc. Amer. 74: 363-369.

DeLoach, C. J. 1976. Neochetina bruchi, a biological control agent of Water Hyacinth: host specificity in Argentina. Ann. Entomol. Soc. Amer. 69: 635-642.

Holm, L.G., Plucknett, D.L., Pancho, J.V. & Herberger, J.P. 1991. Wold's Worst Weeds. Distribution and Biology. Krieger Publishing Company. Malabar, Florida, USA.

Manson, J.G. & Manson, B.E. 1958. Water hyacinth reproduces by seed in New Zealand. New Zealand Jour. Agric. 96: 191.

Matthews, L.J., Manson, B.E. & Coffey, B.T. 1977. Longevity of water hyacinth (Eichhornia crassipes (Mart.) Solms) seed in New Zealand. Proc. 6th Asian-Pacific Weed Sci. Soc. Conf. 1968, Vol. 1: 263-267.

Mitchell, D.S. & Tur, N.M. 1975. The rate of growth of Salvinia molesta (S. auriculata Auct.) in laboratory and natural conditions. Jour. Appl. Ecol. 12: 213-225.

Mitchell, D.S., Pieterse, A.H., & Murphy, K.J. 1990. Aquatic weed problems and management in Africa. Pp.341-354 In A.H. Pieterse & K.J. Murphy, eds. Aquatic Weed, the Ecology and Management of Nuisance Aquatic Vegetation. Oxford, UK, Oxford University Press.

Penfound, W.T. & Earle, T.T. 1948. The biology of the water hyacinth. Ecol. Monogr. 18: 447-472.

Sridahar, M.K.C. 1986. Trace element composition of Pistia stratiotes L. in a polluted lake in Nigeria. Hydrobiologia 131: 273-276.

Tackholm, V. and Drar, M. 1950. Flora of Egypt II. Bull. Faculty Sci., Egypt Univ. Cairo 28: 441-448.


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