Results 111 to 120 of about 509 (144)
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Bulletin of Entomological Research, 1989
AbstractFeeding by adults of Neochetina eichhorniae Warner on water hyacinth, Eichhornia crassipes, significantly increased the hardness of the lamina of the youngest leaf and the petioles of the youngest three leaves, while the moisture content of the petioles and laminae was significantly reduced.
A. D. Wright, N. P. Boland, J. D. Kerr
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AbstractFeeding by adults of Neochetina eichhorniae Warner on water hyacinth, Eichhornia crassipes, significantly increased the hardness of the lamina of the youngest leaf and the petioles of the youngest three leaves, while the moisture content of the petioles and laminae was significantly reduced.
A. D. Wright, N. P. Boland, J. D. Kerr
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Tropical Pest Management, 1988
Abstract Water hyacinth is the most serious aquatic weed in India, infesting more than 200000 ha of water surface. Successful biological control of this weed was achieved in a fully infested tank covering 20 ha at Bangalore. More than 95% of the infestation was cleared within 32 months by releases of Neochetina eichhorniae Warner.
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Abstract Water hyacinth is the most serious aquatic weed in India, infesting more than 200000 ha of water surface. Successful biological control of this weed was achieved in a fully infested tank covering 20 ha at Bangalore. More than 95% of the infestation was cleared within 32 months by releases of Neochetina eichhorniae Warner.
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Bulletin of Entomological Research, 2006
AbstractThe release of classical biological control agents has reduced the economic, environmental and social problems caused by water hyacinth, Eichhornia crassipes; however, additional control measures are needed in some locations. Water hyacinth plants were treated with different densities of eggs of the weevil Neochetina eichhorniae Warner, one of ...
J R U, Wilson, M, Rees, O, Ajuonu
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AbstractThe release of classical biological control agents has reduced the economic, environmental and social problems caused by water hyacinth, Eichhornia crassipes; however, additional control measures are needed in some locations. Water hyacinth plants were treated with different densities of eggs of the weevil Neochetina eichhorniae Warner, one of ...
J R U, Wilson, M, Rees, O, Ajuonu
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BioControl, 2005
Additive or synergistic effects among introduced and native insect and plant pathogen agents are necessary to achieve biological control of waterhyacinth (Eichhornia crassipes), a globally damaging aquatic weed. In field plots, plants were infested with waterhyacinth weevils (Neoechetina bruchi and N.
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Additive or synergistic effects among introduced and native insect and plant pathogen agents are necessary to achieve biological control of waterhyacinth (Eichhornia crassipes), a globally damaging aquatic weed. In field plots, plants were infested with waterhyacinth weevils (Neoechetina bruchi and N.
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Environmental Entomology, 1991
Population dynamics of waterhyacinth, Eichhomia crassipes ((Martinus) Solms-Laubach), and a biological control agent, the weevil Neochetina eichhorniae (Warner), were quantified at a site in Wallisville, Tex., during 1987 and 1988. A decline of waterhyacinth occurred that was most pronounced during the 1988 growing season. Changes included decreases in
Michael J. Grodowitz +2 more
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Population dynamics of waterhyacinth, Eichhomia crassipes ((Martinus) Solms-Laubach), and a biological control agent, the weevil Neochetina eichhorniae (Warner), were quantified at a site in Wallisville, Tex., during 1987 and 1988. A decline of waterhyacinth occurred that was most pronounced during the 1988 growing season. Changes included decreases in
Michael J. Grodowitz +2 more
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Environmental Entomology, 1983
Neochetina eichhorniae Warner has four generations per year in southern Louisiana. The adult sex ratio (males to females) in the field was 1:1, and adults, larvae, and pupae overwintered. Population intensities as high as 8 weevils per plant were observed in August 1980.
John D. Stark, Richard A. Goyer
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Neochetina eichhorniae Warner has four generations per year in southern Louisiana. The adult sex ratio (males to females) in the field was 1:1, and adults, larvae, and pupae overwintered. Population intensities as high as 8 weevils per plant were observed in August 1980.
John D. Stark, Richard A. Goyer
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Biological Control, 2019
Abstract Biological control of water hyacinth, Eichhornia crassipes, has resulted in variable outcomes in temperate regions where cool climates are thought to limit population growth and performance of the biological control agents. The weevil, Neochetina eichhorniae (Coleoptera: Curculionidae), originating from Argentina, was introduced into ...
Angelica M. Reddy +5 more
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Abstract Biological control of water hyacinth, Eichhornia crassipes, has resulted in variable outcomes in temperate regions where cool climates are thought to limit population growth and performance of the biological control agents. The weevil, Neochetina eichhorniae (Coleoptera: Curculionidae), originating from Argentina, was introduced into ...
Angelica M. Reddy +5 more
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Journal of Environmental Science and Health, Part B, 1989
Abstract Water hyacinth plants treated for a week with varying concentrations (10–50 ppm) of soluble Cd, Mn and Zn were taken and fed to the phytophagous weevils Neochetina eichhorniae (Warner), which were subsequently examined for the toxic effects and other parameters.
Md. Saber Hussain, Kaiser Jamil
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Abstract Water hyacinth plants treated for a week with varying concentrations (10–50 ppm) of soluble Cd, Mn and Zn were taken and fed to the phytophagous weevils Neochetina eichhorniae (Warner), which were subsequently examined for the toxic effects and other parameters.
Md. Saber Hussain, Kaiser Jamil
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