01769nas a2200205   4500008004100000020001400041245014400055210006900199260000900268300001000277490000600287520099600293653002201289653002701311100002701338700001901365700002401384700002001408856013501428       2009                        eng d  a1687-880900aEffect of feeding by two Neochetina species or infestation with Tetranychus urticae Koch on histological structure of water hyacinth leaves0 aEffect of feeding by two Neochetina species or infestation with   c2009  a55-610 v23 aBoth weevils, Neochetina bruchi (Hustache) and Neochetina eichhorniae Warner feed on water hyacinth plants as a biocontrol agents. Tetranychus urticae Koch infested the plants grown under light and thermostatic controlled aquatic weed green house, and caused repellency of the weevils. Studying some histological structure, of water hyacinth leaves infested with mites, showed increase of the thickness of upper epidermis, number of palisade cell and thickness of leaf petiole, compared with the control and leaves infested with weevils which recorded decrease in the thickness of leaf petiole and increase in lower palisade tissue. The mites infested plants lost chlorophyll, turned brownish and lost size of vacuoles or air chambers used to store the oxygen. The volume of these vacuoles was very small in case of mite infested plants compared with leaves infested with weevils as the same as control. The weevils feeding reflected in increase in both, length and width of fed upon leaves.10aNeochetina bruchi10aNeochetina eichhorniae1 aEl-Zoghby, Amal, A. A.1 aAli, Fatma, S.1 aBakr, M., H. A. Abo1 aMahgoub, M., H.  uhttps://weevil.myspecies.info/effect-feeding-two-neochetina-species-or-infestation-tetranychus-urticae-koch-histological-structure02089nas a2200193   4500008004100000020001400041245019700055210006900252260000900321300001000330490000700340520127800347653002701625100002501652700002501677700002901702700003001731856013401761       2011                        eng d  a0301-212300aPopulation dynamics of two species of Neochetina (Coleoptera: Curculionidae) associated with Eichhornia crassipes (Pontederiaceae), in oxbow lakes of the Pantanal wetland (Mato Grosso, Brazil)0 aPopulation dynamics of two species of Neochetina Coleoptera Curc  c2011  a55-720 v403 aThe dynamics population of Neochetina eichhorniae Warner, 1970 and Neochetina bruchi Hustache, 1926 (Coleoptera, Curculionidae) was studied in five oxbow lakes along the Cuiaba River, Pantanal of Barao de Melgaco - MT, during one hydrological cycle, from December 2005 to November 2006. A total of 1,871 (78.45%) adult individuals and 514 (21.55%) immature individuals were sampled. The abundance of adults sampled for the two species, considering all sites, differs significantly in comparison with that of immatures, ranging along the hydrological cycle studied. The proportion of immatures was similar to adults only during the flooding period. The population of adults of N. eichhorniae, considering all sites, was significantly higher than that of N. bruchi, varying over time. The maximum abundance of adults occurred during the high and low water period to N. eichhorniae, and in low water and beginning of the dry period for N. bruchi. The variation in abundance, for the development phase during the year assessed can be explained according to the variation of the relative frequency of the host plant, Eichhornia crassipes (Mart.) Solms (Pontederiaceae), the most common and abundant aquatic macrophyte in oxbow lakes sampled along the hydrological cycle studied.10aNeochetina eichhorniae1 ade Sousa, Wesley, O.1 aMarques, Marinez, I.1 aRosado-Neto, Germano, H.1 ade Santana, Vivian, T. P.  uhttps://weevil.myspecies.info/population-dynamics-two-species-neochetina-coleoptera-curculionidae-associated-eichhornia-crassipes00735nas a2200181   4500008004100000020001400041245015500055210006900210260001400279300001200293490000700305653002200312653002700334100002200361700001400383700002100397856013500418       2007                        eng d  a0378-951900aEffect of temperature and relative humidity on the seasonal abundance of water hyacinth weevil, Neochetina eichhorniae Warner and N. bruchi (Hustache)0 aEffect of temperature and relative humidity on the seasonal abun  cSeptember  a233-2350 v3110aNeochetina bruchi10aNeochetina eichhorniae1 aBorkakati, R., N.1 aBasit, A.1 aHazarika, L., K.  uhttps://weevil.myspecies.info/effect-temperature-and-relative-humidity-seasonal-abundance-water-hyacinth-weevil-neochetina-eichhor01668nas a2200217   4500008004100000020001400041245017800055210006900233260001000302300001200312490000700324520085600331653002201187653002701209100001501236700001401251700001301265700002301278700001401301856013501315       2007                        eng d  a1386-614100aSurvival of the mirid Eccritotarsus catarinensis as influenced by Neochetina eichhorniae and Neochetina bruchi feeding scars on leaves of water hyacinth Eichhornia crassipes0 aSurvival of the mirid Eccritotarsus catarinensis as influenced b  cApril  a193-2050 v523 aWater hyacinth (Eichhornia crassipes (Mart.) Solms-Laub.) remains a problem waterweed worldwide, for which biological control offers a sustainable solution. Under laboratory conditions, we investigated the interaction between two established weevil species Neochetina eichhorniae (Warner), Neochetina bruchi Hustache and the mirid Eccritotarsus catarinensis (Carvalho) which have been released together in several countries. Adult and immatures of E. catarinensis had high mortality on plants with high levels of old feeding scars from adult N. eichhorniae and N. bruchi and was significantly different at p 0.05. In contrast, mirid survived well on plants with recent feeding scars from Neochetina spp. or on undamaged plants. Our results indicate that the mirid is compatible with the two weevil species for improving biological control of the weed.10aNeochetina bruchi10aNeochetina eichhorniae1 aAjuonu, O.1 aByrne, M.1 aHill, M.1 aNeuenschwander, P.1 aKorie, S.  uhttps://weevil.myspecies.info/survival-mirid-eccritotarsus-catarinensis-influenced-neochetina-eichhorniae-and-neochetina-bruchi-fe02209nas a2200205   4500008004100000020001400041245022000055210006900275260001300344300001200357490000700369520138600376653002701762100001501789700001401804700001301818700002301831700001401854856013501868       2009                        eng d  a1386-614100aThe effect of two biological control agents, the weevil Neochetina eichhorniae and the mirid Eccritotarsus catarinensis on water hyacinth, Eichhornia crassipes, grown in culture with water lettuce, Pistia stratiotes0 aeffect of two biological control agents the weevil Neochetina ei  cFebruary  a155-1620 v543 aWe assessed the effect of two biological control agents, the mirid Eccritotarsus catarinensis (Carvalho) and the weevil Neochetina eichhorniae (Warner), singly or in combination, on the competitive ability of their host plant, water hyacinth, Eichhornia crassipes (Mart.) Solms-Laub., grown in a screen house, in competition with another aquatic plant (Pistia stratiotes L.). Water hyacinth plant growth characteristics measured included fresh weight, leaf and petiole lengths, number of inflorescences produced, and new shoots. Without herbivory, water hyacinth was 18 times more competitive than water lettuce (across all experimental combinations of initial plant densities), as estimated from fresh weights. Both insect species, singly or in combination, reduced water hyacinth plant growth characteristics. E. catarinensis alone was less damaging than the weevil and under normal conditions, i.e., floating water hyacinth, is not expected to increase control of water hyacinth beyond that of the weevil. When combined with the weevil, half the inoculum of weevils and half the inoculum of mirids produced the same growth reduction as the full inoculum of the weevil. Under conditions where the weevils are not effective because water hyacinths are seasonally rooted in mud, the mirid, which lives entirely on leaves, should become a useful additional biological control agent.10aNeochetina eichhorniae1 aAjuonu, O.1 aByrne, M.1 aHill, M.1 aNeuenschwander, P.1 aKorie, S.  uhttps://weevil.myspecies.info/effect-two-biological-control-agents-weevil-neochetina-eichhorniae-and-mirid-eccritotarsus-catarinen