@article {1223,
	title = {Postembryonic development and biology of Psammotettix alienus (Dahlbom) (Homoptera Cicadellidae) under laboratory conditions},
	journal = {Bollettino di Zoologia Agraria e di Bachicoltura},
	volume = {29},
	number = {1},
	year = {1997},
	pages = {65-80},
	abstract = {Biological aspects on Psammotettix alienus (Dahlbom) were studied under laboratory conditions (27 degree C, 80\% RH and 14L:10D of artificial light photoperiod). Egg and nymph stages were described and illustrated, pointing out those characters (presence or absence and length of wingpads, chaetotaxy of the abdomen and coloration pattern) useful to distinguish each instar. Duration of different developmental stages, life cycle, longevity, fertility, fecundity, survival, life expectance, net reproductive rate, generation time, intrinsic rate of increase and sex ratio were estimated. P. alienus completes its life cycle in approximately 43 days and the adults show a longevity of 16.2 days. Females lay a mean of 36.7 eggs with a range from 3 to 100 and a viability of 62.6\%. The survivorship curve shows two periods of heavy mortality: the first one occurs before the ecdysis from first to second instar and the second one occurs from the first 4 to 8 days as imagoes. The net reproductive rate "Ro" was 11.42; the generation time "T" was 23 days and the intrinsic rate of increase "r" was tbd 0.106. The natural enemies observed in field near Viterbo (Italy) belong to the Dryinidae (Gonatopus clavipes (Thunberg) and G. lunatus Klug) and Pipunculidae (Eudorylas imperfectus (Becker) and Tomosvaryella sp.) families.},
	keywords = {EGG, EMBRYO, EUDORYLAS IMPERFECTUS, FECUNDITY, FERTILITY, GONATOPUS CLAVIPES, GONATOPUS LUNATUS, LABORATORY CONDITIONS, life cycle, LONGEVITY, NATURAL ENEMY, NET REPRODUC, NYMPH, POSTEMBRYONIC DEVELOPMENT, PSAMMOTETTIX ALIENUS, SURVIVAL, TOMOSVARYELLA sp.},
	author = {Guglielmino, A. and Virla, E. G.}
}
@article {1709,
	title = {Biolog{\'\i}a de los hom{\'o}pteros argentinos: 2. Fluctuaci{\'o}n poblacional de Exitianus obscurinervis (Stal, 1859) (Insecta - Cicadellidae). [Biology of the Argentine Homoptera: II. Population fluctuation of Exitianus obscurinervis (Stal, 1859) (Insecta: Cicadelli},
	journal = {Revista de la Facultad de Agronomia Universidad Nacional De La Plata},
	volume = {70},
	year = {1994},
	pages = {37-49},
	abstract = {A study was carried out to investigate the population dynamics of Exitianus obscurinervis in an area of grassland in Argentina and to determine the impact of the most common parasitoids (Dryinidae, Pipunculidae and Halictophagidae) on nymphal and adult stages.},
	keywords = {agricultural entomology, Argentina, beneficial insects, biology, Cicadellidae, Dryinidae, Exitianus obscurinervis, grasslands, Halictophagidae, Homoptera, hosts, insect pests, Insecta, natural enemies, parasitoids, Pipunculidae, population dynamics},
	author = {Virla, E. G.}
}
@article {1710,
	title = {Contribution to the knowledge of natural enemies complex of Exitianus obscurinervis (Insecta - Cicadellidae)},
	journal = {Boletin de Sanidad Vegetal Plagas (Espana)},
	volume = {26},
	number = {3},
	year = {2000},
	pages = {365-375},
	keywords = {composition analysis] [Arachnid predators / Tyrophagus putrescentiae /, Exitianus obscurinervis [Insect parasites / / Parasite complex, host, Insecta [Hemipteran hosts / Exitianus obscurinervis / Para, parasitoid, Pipunculidae, Recorded] [Argentina / / ].},
	url = {<Go to ISI>://ZOOR13700035905},
	author = {Virla, E. G.}
}
@article {1712,
	title = {Datos bion{\'o}micos preliminares y descripcion de la hembra de Cephalops penepauculus (Hardy) (Diptera: Pipunculidae) um parasitoide de Delphacidae (Homoptera: Auchenorryncha) em Argentina},
	journal = {Revista de Investigaci{\'o}n Centro de Investigaciones para la Regulacion de Poblaciones de Organismos Nocivos, Tucum{\'a}n},
	volume = {10},
	number = {1-4},
	year = {1996},
	note = {English title: Preliminary data on bionomy and female description of Cephalops penepauculus (Hardy) (Diptera: Pipunculidae), parasitoid of planthoppers (Delphacidae) in Argentina},
	pages = {33-36},
	abstract = {Cephalops penepauculus was reared from Toya propinqua and Dicranotropis fuscoterminata in Argentina. A description of the female is presented for the first time.},
	keywords = {agricultural entomology, host records, natural enemies, Pipunculidae, rearing, taxonomy},
	author = {Virla, E. G. and Rafael, J. A.}
}
