Results 61 to 70 of about 118 (93)
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Bulletin of Environmental Contamination and Toxicology, 1986
Both aquatic and terrestrial habitats frequently are subject to contamination by toxic heavy metals, yet very little is known about the influence of heavy metals absorbed by plant tissues upon the phytophagous insect fauna feeding upon these plants. The objectives of this study were to determine the influence of plant-absorbed metals upon the feeding ...
S H, Kay, W T, Haller
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Both aquatic and terrestrial habitats frequently are subject to contamination by toxic heavy metals, yet very little is known about the influence of heavy metals absorbed by plant tissues upon the phytophagous insect fauna feeding upon these plants. The objectives of this study were to determine the influence of plant-absorbed metals upon the feeding ...
S H, Kay, W T, Haller
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Environmental Research, 2023
Water hyacinth is the target of nine biological control agents in South Africa including Neochetina eichhorniae (Warner) and Neochetina bruchi (Hustache) (Coleoptera: Curculionidae). These two weevils have also been released against water hyacinth in Rwanda, but failed to control the weed invasion, possibly due to high turbidity in the country's water ...
J A, Mukarugwiro +3 more
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Water hyacinth is the target of nine biological control agents in South Africa including Neochetina eichhorniae (Warner) and Neochetina bruchi (Hustache) (Coleoptera: Curculionidae). These two weevils have also been released against water hyacinth in Rwanda, but failed to control the weed invasion, possibly due to high turbidity in the country's water ...
J A, Mukarugwiro +3 more
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Crop Protection, 2015
Abstract Neochetina weevils have potential as biocontrol agents for water hyacinth, an aquatic weed which seriously affects irrigation water supply in sugarcane, vegetables and other horticultural crop production in the Rift Valley of Ethiopia. A study was conducted on (i) the adaptability and duration of developmental stages of Neochetina weevils ...
Firehun, Y. +3 more
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Abstract Neochetina weevils have potential as biocontrol agents for water hyacinth, an aquatic weed which seriously affects irrigation water supply in sugarcane, vegetables and other horticultural crop production in the Rift Valley of Ethiopia. A study was conducted on (i) the adaptability and duration of developmental stages of Neochetina weevils ...
Firehun, Y. +3 more
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Weed Science, 1982
Waterhyacinth [Eichhornia crassipes(Mart.) Solms] grown in screen-enclosed, outdoor aquaria were treated with factorial combinations of 0, 0.75, 1.5, or 3 kg/ha of the experimental growth retardant EL-509 [α-(4-chlorophenyl)-α-(1-methylethyl)-5-pyrimidine-methanol] and zero, one, two, or three pairs of waterhyacinth weevils (Neochetina ...
Ted D. Center +2 more
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Waterhyacinth [Eichhornia crassipes(Mart.) Solms] grown in screen-enclosed, outdoor aquaria were treated with factorial combinations of 0, 0.75, 1.5, or 3 kg/ha of the experimental growth retardant EL-509 [α-(4-chlorophenyl)-α-(1-methylethyl)-5-pyrimidine-methanol] and zero, one, two, or three pairs of waterhyacinth weevils (Neochetina ...
Ted D. Center +2 more
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BioControl, 2003
Water hyacinth (Eichhornia crassipes (Mart.) Solms.)creates severe problems in the irrigationdistricts of Mexico, particularly in westernSinaloa. Therefore water hyacinth weevils(Neochetina eichhorniae Warner and N. bruchi Hustache), imported from the USA in1993, were used to initiate a biologicalcontrol program.
José Angel Aguilar +3 more
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Water hyacinth (Eichhornia crassipes (Mart.) Solms.)creates severe problems in the irrigationdistricts of Mexico, particularly in westernSinaloa. Therefore water hyacinth weevils(Neochetina eichhorniae Warner and N. bruchi Hustache), imported from the USA in1993, were used to initiate a biologicalcontrol program.
José Angel Aguilar +3 more
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Environmental Entomology, 1984
Examination of data from Florida (United States) and Queensland (Australia) revealed a close relationship between numbers of adult waterhyacinth weevils ( Neochettna etchhomtae Warner) and the number of feeding scars on waterhyacinth leaves. Regression analysis produced nearly identical results for samples from both countries even though data ...
A. D. Wright, T. D. Center
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Examination of data from Florida (United States) and Queensland (Australia) revealed a close relationship between numbers of adult waterhyacinth weevils ( Neochettna etchhomtae Warner) and the number of feeding scars on waterhyacinth leaves. Regression analysis produced nearly identical results for samples from both countries even though data ...
A. D. Wright, T. D. Center
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Biological Control, 1999
Abstract The weevils Neochetina eichhorniae and N. bruchi were released in the USA for waterhyacinth control during the early 1970s and have since been used in many other countries. Although successful control has been reported, questions regarding the efficacy of these insects remain unresolved. This lack of consensus may be attributed to the subtle
Ted D Center +3 more
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Abstract The weevils Neochetina eichhorniae and N. bruchi were released in the USA for waterhyacinth control during the early 1970s and have since been used in many other countries. Although successful control has been reported, questions regarding the efficacy of these insects remain unresolved. This lack of consensus may be attributed to the subtle
Ted D Center +3 more
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Biocontrol of Water Hyacinth: Insights into Neochetina eichhorniae Warner and N. bruchi Hustache
UTTAR PRADESH JOURNAL OF ZOOLOGYEichhornia crassipes (water hyacinth) is one of the world’s most invasive aquatic weeds, posing severe ecological, economic, and social challenges in infested regions. Among the various management strategies, the curculionid weevils Neochetina eichhorniae and N.
Borkakati, Rudra Narayan +2 more
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Weed Science, 1994
Waterhyacinths grown outdoors were treated with combinations of 0 or 22 kg ai ha-1of the plant growth retardant paclobutrazol and 0, 25, or 250 waterhyacinth weevils per culture tank under conditions of low (25% coverage) or high (100% coverage) plant densities. The low plant density treatments simulated a regrowth or colonization situation.
Thai K. Van, Ted D. Center
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Waterhyacinths grown outdoors were treated with combinations of 0 or 22 kg ai ha-1of the plant growth retardant paclobutrazol and 0, 25, or 250 waterhyacinth weevils per culture tank under conditions of low (25% coverage) or high (100% coverage) plant densities. The low plant density treatments simulated a regrowth or colonization situation.
Thai K. Van, Ted D. Center
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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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