A new Anagrus (Hymenoptera: Mymaridae) from Argentina, an egg parasitoid of Delphacodes sitarea (Hemiptera: Archaeorrhyncha: Delphacidae)

A new species of the mymarid wasp genus Anagrus Haliday is described from the Province of Tucumán, Argentina. The type series of A. Anagrus miriamae, S. Triapitsyn and Virla sp. nov. was reared from eggs of the planthopper Delphacodes sitarea Remes Lenicov and Tesón on a common pasture and lawn grass, Stenotaphrum secundatum (Walter) Kuntze. Both the parasitoid and its host are widely distributed in Argentina. Anagrus Haliday is described from the Province of Tucumán, Argentina. The type series of A.(Anagrus) miriamae S. Triapitsyn and Virla sp. nov. was reared from eggs of the planthopper Delphacodes sitarea Remes Lenicov and Tesón on a common pasture and lawn grass, Stenotaphrum secundatum (Walter) Kuntze. Both the parasitoid and its host are widely distributed in Argentina.Fil: Triapitsyn, Serguei. University of California; Estados UnidosFil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentin

A New Species of Anteon (Hymenoptera: Dryinidae) from Argentina

Se describe la nueva especie Anteon tucumanense de San Miguel de Tucumán (Provincia de Tucumán, Argentina). A. tucumanense puede ser diferenciada de las especies neotropicales relacionadas, A. molle Olmi y A. parkeri Olmi, por diferencias en la forma del quinto segmento de los tarsos anteriores (con la parte distal ancha, robusta y derecha en A. tucumanense; con la parte distal angosta, delicada y curva en las otras dos especies). Se provee una clave para la determinación de las especies antedichas y la ilustración de la quela de la nueva especie.A new species, Anteon tucumanense, is described from San Miguel de Tucumán (Tucumán Province, Argentina). This new species can be distinguished from the related Neotropical species A. molle Olmi and A. parkeri Olmi by differences in segment 5 of the fore tarsus (distal part large and straight in A. tucumanense, slender and curved in the other 2 species). A key is provided for the determinations of the above species with an illustration of the female chela of the new species.Fil: Olmi, Massimo. Universita Degli Studi Della Tuscia; ItaliaFil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentin

Preliminary Observations on Zelus Obscuridorsis (Stål) (Hemiptera: Reduviidae) as Predator of the Corn Leafhopper (Hemiptera: Cicadellidae) in Argentina

The corn leafhopper Dalbulus maidis (Hemiptera: Cicadellidae), is an important corn pest in most of tropical and subtropical America. This leafhopper has a rich natural enemy complex of which parasitoids and pathogens are the most studied; knowledge on its predators is limited. We noted the presence of the native assassin bug Zelus obscuridorsis (Hemiptera: Reduviidae) predating diverse motile insects, including the corn leafhopper, on corn plants cultivated in household vegetable gardens in San Miguel de Tucumán (Argentina); in order to verify its predatory actions, we exposed lab-bred individuals of D. maidis to adults of Z. obscuridorsis. The predators were starved for 24 h before trials in which the corn leafhopper in different developmental stages were exposed. Zelus obscuridorsis is highly skilled in catching specimens in motion, but it was not able to prey on eggs. The predator was capable to catch and prey on nymphs and adults.Fil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Planta Piloto de Procesos Industriales Microbiologicos; ArgentinaFil: Melo, María Cecilia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Speranza, Stefano. Universita Degli Studi Della Tuscia; Itali

Suitability of Different Host Plants for Nymphs of The Sharpshooter Tapajosa rubromarginata (Hemiptera: Cicadellidae: Proconinii)

The glassy-winged sharpshooter (GWSS), Homalodisca vitripennis(Germar) has become a major pest in California primarily as a vector of Xylella fastidiosa a bacteria that cause severe diseases to grapes. Owing to the uncertainty of the effectiveness of egg parasitoids native to California against GWSS, a neo-classical biological control approach is ongoing. The survey of natural enemies is conducted on leafhoppers closely related to the target pest in South America. In 2000, egg parasitoids of Tapajosa rubromarginata, a sharpshooter closely related to GWSS, were sought in regions in South America where climate types and habitats were similar to California. Nymphs and adults have different nutritional requirements, alternating host plant as a survival mechanism. Apparently, only a few host plants support the development of nymphs to maturity. We tested the viability of nymphs of T. rubromarginata reared on sweet orange, corn, bermuda grass, rescuegrass, bur clover, cowpea, and a combination of mint + oat as an attempt to determine a suitable substrate to rear this sharpshooter. We recorded high mortality of the newly emerged nymphs maintained with rescuegrass, sweet orange, corn, Bermuda grass and bur clover. Nymphs successfully reached the adult stage only eating on cowpea plants and the combination of mint + oat. Based on the observed survival rate and the number of individuals that reached the adult stage, cowpea was the most appropriate substrate for rearing in the laboratory.Fil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Cangemi, Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Logarzo, Guillermo Alejandro. United States Department Of Agriculture. Agricultural Research Service. Overseas Biological Control Laboratories. South American Biological Control Laboratory; Argentin

Metatranscriptomic analysis of larvae guts from field-collected and laboratory-reared Spodoptera frugiperda from the South American subtropical region

This is the first study to report a high-throughput approach integrating gene expression data from Spodoptera frugiperda guts and their associated metatranscriptomes. Our datasets provide information on the potential effects of environmental conditions on the expression profile of S. frugiperda larval guts, their associated metatranscriptome, and putative interactions between them.Fil: Mccarthy, Cristina Beryl. Universidad Nacional de La Plata. Centro Regional de Estudios Genómicos; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Cabrera, Natalia Alina. Universidad Nacional de La Plata. Centro Regional de Estudios Genómicos; ArgentinaFil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Planta Piloto de Procesos Industriales Microbiologicos; Argentin

Parasitismo natural de huevos de las principales especies de Noctuidae (Lepidoptera) plagas en el cultivo de soja en Tucumán, Argentina

Se evaluó el parasitismo natural de huevos de las tres principales especies de lepidópteros plaga del cultivo de soja (Anticarsia gemmatalis HUbner (Noctuidae, Catocalinae), Rachip/usianu(Guenée) y Pseudoplusia (= Chrysodeixis) includens (Walker) (Noctuidae, Plusiinae) en Ia provincia de Tucumán (Argentina). Se realizaron muestreos semanales en un área de 2 ha, revisando 240 foliolos en cada muestreo. Los parasitoides oófagos encontrados fueron Trichogramma pretiosum Riley, Trichagramma sp. (Hym. Trichogrammatidae) y Encarsia porteri (Mercet) (Hym. Aphelinidae). Estos pazasitoides fueron obtenidos desde las tres especies de lepidópteros. Se determino un 72,6 % de pazasitismo total, siendo A. gemmatalis la especie mas afectada (80,3 %),seguida por Rachiplusia nu.Fil: Valverde, Liliana. Fundación Miguel Lillo. Dirección de Zoología. Instituto de Entomología; ArgentinaFil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentin

Primeiro registro de Eudorylas schreiteri (Shannon) (Diptera: Pipunculidae) como parasitóide da cigarrinha do milho (Hemiptera: Cicadellidae) na Argentina, e uma tabela dos hospedeiros de pipunculídeos na região neotropical

The big-headed fly Eudorylas schreiteri (Shannon) is recorded for the first time as an endoparasitoid of the corn leafhopper Dalbulus maidis (DeLong & Wolcott) in Northern Argentina. A table of known Neotropical pipunculid-host associations is presented.Eudorylas schreiteri (Shannon) é registrada pela primeira vez como endoparasitóide da cigarrinha do milho Dalbulus maidis (DeLong & Wolcott) no norte da Argentina. Uma tabela das espécies neotropicais de pipunculídeos com hospedeiros conhecidos é apresentada.Fil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Moya Raygoza, Gustavo. Universidad de Guadalajara; MéxicoFil: Rafael, José A. Instituto de Pesquisa da Amazônia; Brasi

A New Host Record for the Egg Parasitoid Anagrus nigriventris (Hymenoptera: Mymaridae) of the Corn Leafhopper, Dalbulus maidis (Hemiptera: Cicadellidae)

A survey of the eggs parasitoids of the corn leafhopper, Dalbulus maidis (DeLong & Wolcott) was carried out in Tucumán Province, Argentina. Samples were collected during the summer of 2004-2005 with sentinel eggs. Anagrus nigriventris Girault was responsible for 7.2% of the total egg parasitism. That is the first record of this parasitoid reared from the eggs of D. maidis; A. nigriventris is one of three species of Anagrus known to affect populations of this leafhopper pest in Argentina.Fil: Luft Albarracin, Erica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Triapitsyn, Serguei V.. University of California; Estados Unido

Egg Paeasitoids of Dalbulus maidis (Hemiptera: Cicadellidae) in Jalisco State, Mexico

A survey of eggs parasitoids of the corn leafhopper, Dalbulus maidis (DeLong & Wolcott) was conducted in Jalisco State, Mexico. Samples were collected during the summer of 2008 with sentinel eggs. Five taxa, Anagrus breviphragma Soyka and Polynema sp. (Mymaridae), Paracentrobia nr subflava, Aphelinoidea sp., and Pseudoligosita sp. (Trichogrammatidae) were reared. This is the first reference to an egg parasitoid complex of the corn leafhopper in Mexico, and A. breviphragma is recorded for the first time occurring in Mexico.Fil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Luft Albarracin, Erica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Moya Raygoza, Gustavo. Universidad de Guadalajara; Méxic

First Record of Zelus obscuridorsis (Hemiptera: Reduviidae) as a Predator of the South American Tomato Leafminer, Tuta absoluta (Lepidoptera: Gelechiidae)

The South American tomato leafminer Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is a Neotropical key pest of tomato in South America, and in recent years, it has become established in Europe and Africa. Recently we found the native true bug, Zelus obscuridorsis (Stål, 1860) (Hemiptera: Reduviidae), predating diverse mobile insects in household vegetable gardens located in northwestern Argentina. We found that Z. obscuridorsis preys on mobile stages of T. absoluta, i.e., free larvae and adults but not on larvae in their mines, pupae or eggs. This is the first record of a Zelus species as predator of T. absoluta. We discuss the importance of this predator consuming only mobile items, in terms of using little exploited host niches, and its possible relationships with other antagonistic species of T. absoluta.Fil: Speranza, Stefano. Universita Degli Studi Della Tuscia; ItaliaFil: Melo, María Cecilia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Luna, María Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Virla, Eduardo Gabriel. Fundación Miguel Lillo. Dirección de Zoología. Instituto de Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin