A new species, and a new record of a subspecies belonging to the genus Dysaphis (Homoptera: Aphididae) from Iran

Apterous viviparous female of Dysaphis inulae sp. n. living on Inula britanica and D. lappae cynarae (Theobald) living on Silybum marianum is described and newly recorded from Iran, respectively. The latter aphid species is redescribed and an identification key for the species of Dysaphis Boerner on Asteraceae is also presented

An investigation on alfalfa aphids and their parasitoids in different parts of Iran, with a key to the parasitoids (Hemiptera: Aphididae; Hymenoptera: Braconidae: Aphidiinae)

In the current study some information is presented about the distribution and associations between alfalfa aphids and their parasitoids in different regions in 11 provinces of Iran, as well as an identification key to the parasitoids. The main aphids were Therioaphis trifolii maculata (Buckton) and Acyrthosiphon pisum (Harris) followed by Aphis craccivora Koch and Acyrthosiphon kondoi Shinji. The distribution pattern of these aphids showed a discrepancy in different regions. Therioaphis trifolii maculata was almost distributed in all studied areas, but A. craccivora mostly distributed in lower regions including the deserts of the east and central parts of Iran. Acyrthosiphon pisum and A. kondoi were mainly occurred in higher altitude regions.Trioxys complanatus Quilis and Praon exsoletum (Nees) were found to be specific parasitoids of T. trifolii maculata, and collected, with a few exceptions, in all studied regions. The species of Acyrthosiphon were mainly attacked by Aphidius ervi Haliday followed by A. smithi Sharma & Subba Rao and A. eadyi Starý, Gonzalez & Hall. Lysiphlebus fabarum (Marshall) was the common parasitoid of A. craccivora, but Ephedrus persicae Froggatt locally found to show host specificity on this aphid. Praon volucre (Haliday) was occasionally found to attack A. pisum and A. craccivora, but the other parasitoids including Aphidius colemani Viereck, Lysiphlebus confusus Tremblay & Eady and Diaeretiella rapae (McIntosh) were only reared from A. craccivora. Considering the occurrence of alfalfa aphids together with their parasitoids in almost all studied areas, it seems that more attention should be paid to the parasitoids of alfalfa aphids, especially the specific ones, along with other control methods in an integrated pest management programme

Ionization of hydrogen and hydrogenic ions by antiprotons

Presented here is a description of the ionization of hydrogen and hydrogenic ions by antiproton-impact, based on very large scale numerical solutions of the time-dependent Schr\"odinger equation in three spatial dimensions and on analysis of the topology of the electronic eigenenergy surfaces in the plane of complex internuclear distance. Comparison is made with other theories and very recent measurements.Comment: RevTex document, 11 pages, 4 Postscript figures are available from the authors, in press Phys. Rev. Let

Preliminary taxonomic study of the genus Praon (Hymenoptera: Braconidae: Aphidiinae) and its host associations in Iran

In the current study, the information on occurrence, distribution and host aphid-plant associations for the species of Praon Haliday in Iran are presented. Eight species of Praon were found in the areas under study, which include four previously reported species, viz. Praon absinthi Bignell, Praon barbatum Mackauer, Praon exsoletum (Nees) and Praon volucre (Haliday), and four new records, Praon orpheusi Kavallieratos, Athanassiou & TomanoviÄ, Praon rosaecola Starý, Praon abjectum (Haliday) and Praon yomenae Takada, of which P. volucre was the most common species. The presence of P. yomenae as a parasitoid of Uroleucon aphids, instead of Praon dorsale (Haliday), which does not occur in Iran, is documented. A key for identification of the Praon species occurring in Iran is presented