M. Cristina Hernández

M. Cristina Hernández
Fundación Para El Estudio De Especies Invasivas

Doctor in Biological Science

About

23
Publications
4,226
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115
Citations
Citations since 2016
4 Research Items
62 Citations
2016201720182019202020212022024681012
2016201720182019202020212022024681012
2016201720182019202020212022024681012
2016201720182019202020212022024681012

Publications

Publications (23)
Article
Exotic water primroses are aggressive invaders in both aquatic and riparian ecosystems worldwide. Water primrose [Ludwigia hexapetala (Hook. & Arn.) Zardini, Gu & P. H. Raven], floating primrose-willow [Ludwigia peploides (Kunth) P. H. Raven subsp. peploides], floating primrose-willow [Ludwigia peploides (Kunth) P. H. Raven subsp. montevidensis (Sp...
Article
The host range of the thrips Liothrips ludwigi was investigated using single- and multi-generational no-choice nymphal development and oviposition tests. Development, oviposition, and egg viability were quantified when L. ludwigi were fed three exotic Ludwigia species and seven USA native plant species. Liothrips ludwigi completed development and o...
Article
Full-text available
The aim of this paper is to shed light on the boundaries of two sympatric species of Cuernavaca, C. inexacta and C. longula, to enable further ecological studies. Species in this genus are associated with water hyacinths in wetlands of Northeastern Argentina (Paraná-Paraguay waterway system) and the Peruvian Amazon. This work lists new host records...
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Classical biological control –or biocontrol- is a form of pest management comprising the release of specialized natural enemies (biocontrol agents) of an exotic pest. Classical biocontrol agents are scientifically selected from among the natural enemies the pest has in its native region. However biological control is firmly resisted in many countri...
Article
Full-text available
The South American water primroses, Ludwigia grandiflora (Michx.) Greuter & Burdet, L. grandiflora subsp. hexapetala (Hook. & Arn.) G.L. Nesom & Kartesz, Ludwigia peploides (Kunth) P.H. Raven, and L. p. subsp. montevidensis (Spreng.) P.H. Raven (Onagraceae, Section Oligospermum), have become invasive in several watersheds of the United States and E...
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Full-text available
Taosa longula Remes Lenicov (Hemiptera: Dictyopharidae), a planthopper native to South America, is a candidate for the biological control of water hyacinth, Eichhornia crassipes (Mart.) Solms-Laubach (Pontederiaceae), a serious weed worldwide. Biological control requires agents that are not only specific but also effective. Damage caused by sap-suc...
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ABSTRACT. „„Liothrips ludwigi (Thysanoptera: Phlaeothripidae) is described and a key to differentiate it from the other four species present in Argentina is provided. This species can be distinguished by the following characters: major setae on head and pronotum slender and brown yellowish; anteromarginal setae short (14μ-21μ), and metanotum reticu...
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Abstract Descriptions of the immature stages of Taosa (Cuernavaca) longula Remes Lenicov (Hemiptera: Fulgoroidea: Dictyopharidae) and a key for their identification is provided for specimens collected on the water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach (Commelinales: Pontederiaceae), in northeastern Argentina and Peru. Newly emerged...
Article
Full-text available
Taosa longula Remes Lenicov (Hemiptera: Dictyopharidae) is a planthopper from the South American tropics that feeds on water hyacinth, Eichhornia crassipes (Mart.) Solms-Laubach (Pontederiaceae). The biology of T. longula was studied in the laboratory and field to evaluate it as a potential biological control agent for this widespread aquatic weed....
Article
Full-text available
Megamelus scutellaris Berg (Delphacidae) and Taosa (Cuernavaca) longula Remes Lenicov (Dictyopharidae) are specialist planthoppers that feed and reproduce on the invasive aquatic weed, Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae). They overlap geographically in several regions of South America and may, therefore, interact and compe...
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Full-text available
Egg parasitoids (Hymenoptera: Eulophidae and Platygastridae) of Taosa (Cuernavaca) longula Remes Lenicov (Hemiptera: Dictyopharidae) are reviewed and keyed. This planthopper feeds on water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach, and was collected in Formosa, Argentina, where some of its eggs turned out to be parasitized. Two new spe...
Article
Full-text available
ABSTRACT. Egg parasitoids (Hymenoptera: Eulophidae and Platygastridae) of Taosa (Cuernavaca) longula Remes Lenicov (Hemiptera: Dictyopharidae) are reviewed and keyed. This planthopper feeds on water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach, and was collected in Formosa, Argentina, where some of its eggs turned out to be parasitized. T...
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Full-text available
Egg parasitoids (Hymenoptera: Eulophidae, Mymaridae, and Platygastridae) of Megamelus spp. (Hemiptera: Delphacidae) in Argentina are reviewed and keyed. Four new species are described: Anagrus (Anagrus) empanadus Triapitsyn, sp. nov. (Mymaridae, parasitoid of M. scutellaris Berg feeding on water hyacinth, Eichhornia crassipes (Martius) Solms-Laubac...
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Full-text available
ABSTRACT A new species of Taosa (Hemiptera: Dictyopharidae) is described. All the stages were collected on the aquatic weed Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae) at several localities on the Paraguay River in Argentina, and in the upper Amazon River in Peru´ . Taosa (Cuernavaca) longula Remes Lenicov sp. nov. is distinguishe...
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Full-text available
ABSTRACT. Egg parasitoids (Hymenoptera: Eulophidae, Mymaridae, and Platygastridae) of Megamelus spp. (Hemiptera: Delphacidae) in Argentina are reviewed and keyed. Four new species are described: Anagrus (Anagrus) empanadus Triapitsyn, sp. nov. (Mymaridae, parasitoid of M. scutellaris Berg feeding on water hyacinth, Eichhornia crassipes (Martius) So...
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Full-text available
The mining flies Thrypticus truncatus Bickel & Hernández and Thrypticus sagittatus Bickel & Hernández (Diptera: Dolichopodidae) are being evaluated as biological control agents for the water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae). The behavior of adults and larvae of these species was studied in the laboratory and i...
Article
Thrypticus truncatus is a candidate agent for biocontrol of waterhyacinth; the larvae of this diptera mine in the petioles and feed on the phloem in the vascular bundles. The mycobiota associated with T. truncatus and T. sagittatus mines was investigated during two surveys undertaken in the spring and autumn in the Delta of the Paraná River, Argent...
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Full-text available
ABSTRACT. Larval feeding behavior of the truncatus group of Thrypticus (Diptera: Dolichopodidae) that breed in Pontederiaceae species are presented. The larvae of T. circularis Bickel & Hernández develop in globous petioles of Eichhornia crassipes (Martius) Solms- Laubach (Pontederiaceae), digging a mine near the epidermis and forming several holes...
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Full-text available
Nine new species of Thrypticus (Diptera, Dolichopodidae) are described from South America: T. truncatus, T. sagittatus, T. yanayacu, T. circularis, T. chanophallus, T. romus, T. azuricola, T. formosensis, and T. taragui. All nine species were reared from the petioles and stems of aquatic and semiaquatic Pontederiaceae, Þve of them from water hyacin...
Article
Introduction Water primrose, Ludwigia grandiflora (Michx.) Greuter & Burdet ssp. hexapetala (Hook. & Arn.) G.L. Nesom & Kartesz (Synonym: L. hexapetala), is an aquatic perennial creeper native to South America that invaded freshwater wetlands in California (Okada et al. 2009) and Europe. Its distribution in South America ranges from the tropics to...
Article
Full-text available
Since the beginning of the investigations on natural enemies of water hyacinth, Thrypticus has been mentioned among the top seven candidates for biological control. In 1995, a revived interest for biocontrol of water hyacinth directed the investigations to new agents and Thrypticus stood as a priority candidate. Thrypticus occurs in Central and Sou...

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Projects

Projects (2)
Project
Our project has three main goals: 1) Investigate the feasibility of biological control of invasive Ludwigia spp. in the USA. 2) In collaboration with colleagues from FuEDEI (Argentina) and INIA (Uruguay), import potential biological control agents into our Quarantine in Albany, CA, where we will rear, study the biology, and conduct host-range tests. 3) Establish collaborations to help us acquire non-target (native) plants to use in the host-range trials.
Project
Ludwigia grandiflora, L.g.subsp. hexapetala and L.peploides are native in Argentina and have 17-20 spp of associated insects species. The objectives are: 1-Found insect species associated with L.g.hexapetala. 2-Select potential candidates for biocontrol, study and test them. 3- Morphological and cytological taxonomy of the host plant and related species in Ludwigia genus.