The adults of these weevils attack the plant and feed by. Neochetina feed almost exclusively on the highly vigorous water hyacinth eichhornia spp. Under laboratory conditions, we investigated the interaction between two established weevil species neochetina eichhorniae warner, neochetina bruchi hustache and the mirid eccritotarsus catarinensis carvalho. Kumbang neochetina eichhorniae sebagai agens pengendali. Pdf food preference neochetina eichhorniae coleoptera. Implikasi keberadaan agens hayati neochetina eichhorniae. Neochetina eichhorniae was significantly more abundant than n. Your use of this pdf, the bioone complete website, and all posted and associated content indicates your.
Neochetina eichhorniae warner and neochetina bruchi hustache on the growth of water hyacinth. Age and phytochemical composition of waterhyacinth. Scarring and leaf areas on the new, youngest unfurled leaf, the tagged leaf 23 positions from the shoot apex and the oldest live leaf were measured. The egg hatching period of neochetina bruchi ranged from 4 to 10 days, while neochetina eichhorniae took 812 days. Females of both species produce between 350 and 400 eggs. Neochetina eichhorniae is mottled browngrey, while n.
Establishment, spread and impact of neochetina spp. Some aspects of the evapotranspiration of eichhornia crassipes and some other aquatic weeds. Although successful control has been reported, questions regarding the efficacy of these insects remain unresolved. Herbivory by biological control agents improves herbicidal. Control actions included biocontrol using neochetina bruchi and n.
Adaptability of two weevils neochetina bruchi and neochetina eichhorniae with potential to control water hyacinth in the rift valley of ethiopia. Below is a figure arcgis work by clayton sodergren highlighting the spatial variation in peak weevil densities augnov. However, females that previously experienced cactus frass stung a higher proportion of larvae fed on cactus fig. Water hyacinth weevils neochetina eichhorniae and n. Curculionidae and niphograpta sameodes albiguttalis warren lepidoptera. Curculionidae by aquatic plants of different nutritional value. Implementation guideline on use of neochetina weevils for water hyacinth control around lake tana page 3 executive summary lake tana is the largest freshwater body in ethiopia and the source of the blue nile river. The effectiveness of neochetina eichhorniae as a biocontrol agent of waterhyacinth was evaluated in west java and dki jakarta.
Nov, 2008 abstract water hyacinth is the most serious aquatic weed in india, infesting more than 200000 ha of water surface. Water hyacinth weevil agricultural research council. The two weevil species neochetina eichhorniae and neochetina bruchi, and the two moth species niphograpta albiguttalis previously known as sameodes albiguttalis and xubida. Life cycle and behavior of neochetina eichhorniae warner.
Bioaccumulation of heavy metal ions and their effect on. The mottled water hyacinth weevil, neochetina eichhorniae, is a beetle that has been introduced as a biological pest control herbivore agent to waterways and lakes in countries worldwide to control the spread of the invasive noxious weed species eichhornia crassipes. Haag archer road laboratory, department of entomology and nematology, institute of food and agricultural sciences, university of florida, gainesville, florida 32611. Neochetina eichhorniae and neochetina bruchi, have been widely used with success.
Effects of herbicide application on mortality and dispersive behavior of the water hyacinth weevils, neochetina eichhorniae and neochetina bruchi coleoptera. Curculionidae is one herbivore associated to eichhornia crassipes and e. Mitchell salviniaceae or giant salvinia is a floating fern that causes profound ecological, environmental, and infrastructural problems in more than 20 tropical and subtropical countries. Bioaccumulation of heavy metal ions and their effect on certain biochemical parameters of water hyacinth weevil neochetina eichhorniae warner journal of environmental science and health, part b. Ajuonu obinna a thesis submitted to the faculty of science, university of witwatersrand. Biological control of waterhyacinth in sinaloa mexico with the weevils neochetina eichhorniae and n. The two weevils neochetina eichhorniae and neochetina bruchi were imported and released in an attempted biological.
Download fulltext pdf download fulltext pdf food preference neochetina eichhorniae coleoptera. Successful biological control of water hyacinth eichhornia. Neochetina eichhorniae warner the mottled waterhyacinth weevil released in 1972, the argentinian n. Short communication the decline of water hyacinth on lake. The latest versions of adobe reader do not support viewing pdf files within firefox on mac os and if you are using a modern. The life cycles of the neochetina species reared in the semi arid conditions show peculiar characteristics. We do not use these to store personal information about you. Eichhornia crassipes is an introduced exotic pest of the eppo region originating. Accrued feeding damage on 8dold leaves was only about 60% of the sum of two respective sets of 4dold leaves. Cambridge core bulletin of entomological research volume 96 issue 2. The plastron theory was tested in adults of neochetina eichhorniae warner, 1970, through the analysis of the structure that coats these insects integument and also through submersion laboratorial experiments. Gitonga abstract the kenya agricultural research institute imported 12,300 curculionid weevils neochetina spp.
Implikasi keberadaan spesies asing invasif eceng gondok. A simple, efficient method for extracting neochetina eichhorniae. When compared to first release in field, the weevil intensity was increased in numbers. Biological control of waterhyacinth in sinaloa, mexico. Biological control of waterhyacinth in sinaloa mexico. The study demonstrates effectiveness of biocontrol weevil open field release on experimental site chittar river.
Serious economical and ecological problems are caused by this weed. The tegument processes were recognized in three types. Successful biological control of this weed was achieved in a fully infested tank covering 20 ha at bangalore. Mass rearing of neochetina third generation of neochetina spp. Successful biological control of water hyacinth eichhornia crassipes in papua new guinea by the weevils neochetina bruchi and neochetina eichhorniae coleoptera. The institute of food and agricultural sciences ifas is an equal opportunity institution authorized to provide research, educational information and other services only to individuals and institutions that function with nondiscrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. Jun 01, 20 induced resistance in invasive plants might influence herbivore performance or preference, and hamper herbivorebased biological control management. Weevil abundances varied among sites and between species. Uganda, nile international conference center, room 235, p. The complete book on organic farming and production of organic compost. Pdf importation, releases, and establishment of neochetina. Research was conducted in several freshwater ecosystem infested by waterhyacinth and n. The two weevils neochetina eichhorniae and neochetina bruchi were imported and released in an attempted biological control against the weed. Behavior of the weevil neochetina eichhorniae warner, a specialist herbivore, varied with leaf age of waterhyacinth eichhornia crassipes mart.
Biological control of water hyacinth in the kagera river. In the field, adult feeding decreased as the leaves aged. Observations on the effect of the weevils neochetina eichhorniae. This lack of consensus may be attributed to the subtle impacts of these agents on plant health and vitality or. A study on the interaction between two weevils neochetina. Four insect species have been introduced from south america and released by csiro since 1975. These three agents, plus the mite orthogalumna terebrantis wallwork, are now widely used throughout the world for water hyacinth biological control. Early stages of larval feeding damage caused by neochetina weevils advanced stages of larval feeding damage caused by neochetina weevils 4. Toxicities of commonly used water hyacinth herbicides and additives to water hyacinth weevils, neochetina eichhorniae warner and n. Pdf impact of the weevils neochetina eichhorniae and n. Observations on the effect of the weevils neochetina. Curculionidae, hereafter neochetina, are specialist herbivores that feed on e. Lauderdale, fl 33314 a bstract neochetina eichhorniae warner.
Survival of the mirid eccritotarsus catarinensis as. Biological control of waterhyacinth in sinaloa, mexico with. Biological control efforts using neochetina eichhorniae and n. Water hyacinth department of agriculture and fisheries. Biological control of waterhyacinth in sinaloa mexico with. Eggs are more slender and are softer than those of n. A study on the interaction between two weevils neochetina eichhorniae and n. This reportedly alternates with ogenesis and is reversible. Neochetina eichhorniae warner and neochetina bruchi hustache coleoptera. Direct and indirect effects of herbicides on insect. The mottled water hyacinth weevil, neochetina eichhorniae, is a beetle that has been introduced as a biological pest control herbivore agent to waterways and lakes in countries worldwide to control the spread of the invasive noxious weed species eichhornia crassipes, the water hyacinth, an aquatic plant native to the amazon basin. Functionality of the plastron in adults of neochetina eichhorniae warner coleoptera, curculionidae. Biological control of waterhyacinth in sinaloa, mexico with the weevils neochetina eichhorniae and n. One pair of adults was placed on each plant 80 plantsm 2 in 2 m 2tanks which were covered with greenhouse shade cloth 40% light to prevent escape of the insects.
Sep 04, 2017 ethiopias lake tana is losing the fight to water hyacinth september 4, 2017 11. Ethiopias lake tana is losing the fight to water hyacinth. Effects of host quality on flight muscle development in. Lissorhoptrus leconte, 1876, neochetina hustache, 1926 and notiodes schoenherr, 1838 endalus laporte, 1840, also suggesting that this kind of adaptation may have evolved more than once inside some of these genera. Pdf waterhyacinth weevils neochetina eichhorniaeandn. Flight response to host quality 161 effects of host quality on flight muscle development in neochetina eichhorniae and n. A simple, efficient method for extracting neochetina. When several references are cited, they may give conflicting information on the status. Biological control of water hyacinth in the kagera river headwaters of rwanda. Effects of herbicide application on mortality and dispersive. Life cycles of neochetina bruchi warner and neochetina. Establishment of neochaetina spp their pattern of local dispersal and age structure at release site. Crambidae were released during 19821987 at four locations for the biological control of water hyacinth. Text is available under the creative commons attributionsharealike license.
Adaptability of two weevils neochetina bruchi and neochetina. Weevils were either sprayed while on water hyacinth plants or dipped directly into the compounds tested. Two experiments evaluated the additive impact of herbivory by two biological control agents with three different rates of 2,4d on waterhyacinth growth and development in. Curculionidae were imported to the great lakes region, and from 1995 onwards they were released onto different parts of the lake.
This study was conducted, with the aim of quantifying the lifecycles of neochetina bruchi and neochetina eichhorniae under the semiarid maiduguri conditions in nigeria. Curculionidae and implications for the biological control of water hyacinth, eichhornia crassipes, in a temperate climate. Obcl newsletter, may 2017 page 2 we found that prior experience in a. Australian centre for international agricultural research aciar, canberra. Variation in cool temperature performance between populations of neochetina eichhorniae coleoptera. Between 1991 and 1993, two weevils species, neochetina eichhorniae warner and n. Abstract water hyacinth is the most serious aquatic weed in india, infesting more than 200000 ha of water surface. The water hyacinth weevils neochetina eichhorniae and neochetina bruchi a natural enemy of water hyacinth eichhornia crassipes in south africa 21 dossiers on biological control agents available to aid alien plant control description adult weevils are 4 5 mm long, nocturnal and during the day shelter. Mymaridae were reared from weevil eggs on one occasion. Classical biological control of waterhyacinth is difficult to evaluate against the backdrop of active herbicide programs. Specialist weevils neochetina eichhorniae hustache coleoptera.
Jun 03, 2015 this study was conducted, with the aim of quantifying the lifecycles of neochetina bruchi and neochetina eichhorniae under the semiarid maiduguri conditions in nigeria. Biologies, host ranges, and rearing, releasing and monitoring techniques for biological control of eichhornia crassipes. Both of the neochetina weevil species were collected at all seven study sites during this study. Neochetina bruchi and neochetina eichhorniae on river based field trial. Leaf scarring by the weevils neochetina eichhorniae and n. The complete book on organic farming and production of. Life cycles of neochetina bruchi warner and neochetina eichhorniae hustache as potential biological control agents in the semi arid zone of nigeria. In 1994, it became the first longpublished, refereed, natural science journal to make its content available on the internet and the first journal to use pdf for that purpose. Biological control of water hyacinth in californias. More than 95% of the infestation was cleared within 32 months by releases of neochetina eichhorniae warner. The distribution in this summary table is based on all the information available. General information about neochetina eichhorniae neonei this website uses cookies our website uses cookies to ensure that we give you the best possible online experience.
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