15 results match your criteria: "Univ. Nacional de La Plata[Affiliation]"

Cantharidin: A Multiporpuse Beetlejuice.

Neotrop Entomol

August 2024

División Entomología, Museo de La Plata, Univ Nacional de La Plata, CONICET, La Plata, Buenos Aires, Argentina.

Cantharidin is produced by beetles of two families, Meloidae (true blister beetles) and Oedemeridae (false blister beetles). Nevertheless, it is mainly members of the meloid family that have been widely studied in the traditional medicines and pharmacology of different cultures and countries. The meloids cantharidin's role is going to be reviewed in this paper, including the cantharidin discovery, its adaptative function, and worldwide uses.

View Article and Find Full Text PDF

The Southeast Asian-native Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), also known as "spotted-wing Drosophila," is one of the most globally invasive agricultural species. Although D. suzukii is a pest spread throughout all the Argentinian fruit-growing regions, few information has been published on its impact on local fruit production.

View Article and Find Full Text PDF

Mixed gels of carrageenan (Car) and caprine whey protein concentrate (WPCc) (pH 7) were studied and compared with those prepared with Car and commercial bovine whey protein concentrate (WPCb). Dynamic rheology studies indicate that gels with WPCc were weaker (lower G') than those made with WPCb. However, textural parameters such as, hardness, springiness and cohesiveness were similar in both type of gels.

View Article and Find Full Text PDF

Activity Against Musca domestica of Hypocrealean Fungi Isolated from Culicids in Central Brazil and Formulated in Vermiculite.

Neotrop Entomol

June 2022

Lab de Patologia de Invertebrados (LPI), Instituto de Patologia Tropical e Saúde Pública (IPTSP), Univ Federal de Goiás (UFG), Goiânia, Goiás, Brazil.

Musca domestica L. is a cosmopolitan nuisance of high sanitary importance. Entomopathogenic fungi are innovative and attractive tools for integrated control of the housefly to overcome insufficient levels of control caused by increasing resistance of this pest against chemical insecticides.

View Article and Find Full Text PDF

Performance of oxalic acid-chitosan/alumina ceramic biocomposite for the adsorption of a reactive anionic azo dye.

Environ Sci Pollut Res Int

December 2021

CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos) CONICET-Facultad de Ciencias Exactas, UNLP, CIC-PBA, Calle 47 y 116, La Plata, 1900, Buenos Aires, Argentina.

A biocomposite system was developed and tested for the removal of the azo dye Reactive Red (RR195) from wastewater. The biocomposite was synthesized using ceramic particles containing 75% alumina which were coated using chitosan cross-linked with oxalic acid. The biocomposite showed high performance at low pH (maximum adsorption capacity = 345.

View Article and Find Full Text PDF

Parasitoids of three mealybug pests (Hemiptera: Pseudococcidae), Planococcus ficus (Signoret), Pseudococcus sociabilis Hambleton, and Pseudococcus viburni (Signoret) have been identified for the first time in Brazil. Mealybugs were collected in fruit-growing areas along southern Brazil during 2013-2016. An integrative approach, combining morphological and molecular methods, was used to identify the Brazilian parasitoids to the species level.

View Article and Find Full Text PDF

Ceratopogonidae (Diptera) Communities in a Protected Area Threatened by Urbanization.

Neotrop Entomol

June 2020

Instituto de Limnología "Dr. Raúl A. Ringuelet", CONICET, CCT La Plata, Univ. Nacional de La Plata, La Plata, Argentina.

This study highlights the species diversity of Ceratopogonidae from the Paranaense forest and adjacent grassland in a protected natural area of Argentina, and emphasizes the importance of conserving the last remaining marginal forest area surrounded by a strong urbanization. A total 46 species belonging to 10 genera were recorded from these two habitats. Species diversity was higher in the grassland, while dominance was greater in the forest.

View Article and Find Full Text PDF

Aegilips chilensis (Hymenoptera: Cynipoidea: Figitidae: Anacharitinae): Redescription and Biogeographic Considerations.

Neotrop Entomol

August 2019

Depto de Biologia Animal, Facultat de Biologia, Univ de Barcelona, Avda. Diagonal 645, 08028, Barcelona, Spain.

Aegilips chilensis Bréthes, 1918 is redescribed and illustrated. Aegilips chilensis is considered an endemic species of the Andean region, characterized for having anteroposterior cephalic processes, resembling spines, formed from the postgenal carina. This and other diagnostic characters are diagnosed and illustrated, and morphological affinities of Aegilips Haliday, 1835 with other Anacharitinae genera are discussed.

View Article and Find Full Text PDF

Kinetic Parameters for the Thermal Inactivation of Peroxidase and Lipoxygenase in Precooked Frozen Brassica Species.

J Food Sci

June 2017

Centro de Investigación y Desarrollo en Criotecnología de Alimentos CIDCA (UNLP-CONICET-CIC), La Plata, Argentina, Calle 47 y 116, CP 1900, Argentina.

Thermal inactivation of peroxidase (POD) and lipoxygenase (LOX), both enzymes present in broccoli and Brussels sprouts, is required before freezing, to obtain high-quality precooked frozen vegetables. Rate constants of a 1st-order biphasic model for the heat-labile and heat-resistant POD and LOX isoenzymes were determined at different temperatures (75, 80, and 90 °C) and the corresponding activation energies were estimated using nonlinear regressions. In the case of Brussels sprouts, the activation energies for the resistant and labile fractions were 56.

View Article and Find Full Text PDF

Structure of the Tortricid-Parasitoid Community in a Recently Introduced Crop.

Neotrop Entomol

December 2015

Fac de Ciencias Naturales y Museo, CEPAVE (CCT La Plata, CONICET, UNLP), Univ Nacional de La Plata, Boulevard 120 s/n entre 61 y 62 (1900), La Plata, Argentina.

The introduction of exotic commercial plants represents a change in the food resources for the communities of herbivores. The blueberry is native to the northern hemisphere and was recently introduced in Argentina, so we expect to find polyphagous tortricids and a low complexity in the tortricid-parasitoid community. Tortricids are exophytic leaf-rollers and flower and fruit feeders, they can feed on different plant structures, and they may be present in every blueberry phenological stage.

View Article and Find Full Text PDF

Effects of Pepper (Capsicum annuum) Cultivars on the Biology and Life Table Parameters of Myzus persicae (Sulz.) (Hemiptera: Aphididae).

Neotrop Entomol

December 2013

Univ Nacional de La Plata, Fac de Ciencias Agrarias y Forestales, La Plata, Buenos Aires, Argentina.

Green peach aphids, Myzus persicae (Sulz.) (Hemiptera: Aphididae), obtained from pepper fields, were colonized on susceptible pepper plants in a growth chamber. The development, survivorship, and life table parameters of the green peach aphid were evaluated on nine peppers cultivars as follows: Almuden, Bilano, Bird, Cabezo, de la Sierra, Eppo, Jaen, Raza, and Yatasto at controlled conditions (20 ± 1°C; about 70% RH; 14h photophase).

View Article and Find Full Text PDF

On the presence of five species of naupactini (Coleoptera: Curculionidae) damaging soybean in Brazil.

Neotrop Entomol

June 2013

División de Entomología, Museo de La Plata, Univ Nacional de La Plata, La Plata, Argentina.

We report five broad-nosed weevils of the tribe Naupactini, Naupactus leucoloma Boheman, Naupactus minor (Buchanan), Naupactus peregrinus (Buchanan), Naupactus tremolerasi Hustache and Pantomorus viridisquamosus (Boheman) (Coleoptera: Curculionidae) damaging soybean plants in the state of Rio Grande do Sul, Brazil. Some of these species are recorded for the first time in Brazil, and they all belong to species groups naturally distributed in the prairies of southern Brazil, Uruguay, Central Argentina and Paraguay. Three of them have been introduced, established and expanded in other countries outside South America.

View Article and Find Full Text PDF

A new species of Saccharosydne Kirkaldy from Argentina (Hemiptera: Delphacidae).

Neotrop Entomol

November 2010

División Entomología, Facultad de Ciencias Naturales y Museo, Univ Nacional de La Plata, La Plata, Buenos Aires, Argentina.

Saccharosydne is the most diverse genus of the tribe Saccharosydnini. Male, female and nymphal Saccharosydne have been captured in recent collections from garlic (Allium sativum), rye (Secale cereale) and pampas grass (Cortaderia spp.) in Argentina.

View Article and Find Full Text PDF

Effect of diet composition on the development of the floodwater Mosquito Ochlerotatus (Ochletotatus) albifasciatus (Macquart) (Diptera: Culicidae).

Neotrop Entomol

April 2009

Instituto de Limnología Dr. Raúl A. Ringuelet , Univ. Nacional de La Plata, Casilla de Correo 712, B1902ZAA, La Plata, Buenos Aires, Argentina.

One important step for the colonization of Ochlerotatus albifasciatus (Macquart) is to determine the optimal conditions for larval rearing, which makes possible the development of experiments comprising larval rearing in the laboratory. In this research the effect of diet composition on the development of O.albifasciatus was studied.

View Article and Find Full Text PDF

Based on a study of the larvae from two helminth species parasitizing the crab Cyrtograpsus angulatus Dana, 1851 (Microphallus szidati Martorelli, 1986 and Falsifilicollis chasmagnathi Holcman-Spector et al., 1977), from Mar chiquita lagoom (Argentina) together with the analyses of their life cycles and rates of prevalence, intensity and association coefficient (compared in definitive and intermediate host) the following conclusions have been reached: a) C. angulatus suns to be an excellent intermediate host in the life-cycles of the studied helminths; b) the size of the crabs and the occurrence of natural amputations in the females (Spivak & Politis, in press) appeared correlated with prevalence; c) in the studied crabs the prevalence for F.

View Article and Find Full Text PDF