Gennaro Viggiani

Learn More
The side effect of 10 insecticides, 5 fungicides and 5 herbicides on 24 different species of beneficial organisms was tested by members of the Working Group ‘Pesticides and Beneficial Organisms’ of the International Organization for Biological Control (IOBC), West Palaearctic Regional Section (WPRS). The tests were conducted by 32 members in 12 countries(More)
The side effects of 5 insecticides, 8 fungicides and 6 herbicides on 24 species of beneficial organisms were tested by members of the Working Group «Pesticides and Beneficial Organisms» of the International Organization for Biological Control (IOBC), West Palaearctic Regional Section (WPRS). The tests were conducted by 24 members in 11 countries according(More)
The cosmopolitan genus Anagrus Haliday is one of the largest in Mymaridae (Hymenoptera: Chalcidoidea), and includes very common egg parasitoids, mostly of leafhoppers. The smallest species (body length: 0.4-0.6 mm) are found in the atomus species group. This group at present includes about 20 species worldwide. Anagrus atomus (Linnaeus) is among the most(More)
Laboratory, semi field and field tests to assess the side effects of 20 pesticides on 19 different beneficial organisms were carried out by members of the Working Group “Pesticides and Beneficial Organisms” of the International Organization for Biological Control (IOBC), West Palearctic Regional Section (WPRS). This 5th joint pesticide testing programme of(More)
The side effect of 20 commercial pesticides (10 insecticides/acaricides, 6 fungicides, 4 herbicides) on 6 different beneficial arthropods was tested by members of the IOBC/WPRS Working Group “Pesticides and Beneficial Arthropods” in 3 countries. The tests were done according to standardized methods based on common rules, which, among others, emphasize the(More)
The Author describes the peculiar behaviour of the larvae of some species ofKratochviliana andDiglyphus, parasites of leaf-mining insects. The last-stage larvae of the parasites, before pupation, dispose the excrements around their body in order to sustain the mine-walls which tend to approach too much. This type of behaviour is emphasized as one of the(More)
L'Auteur confirme les observations deSilvestri concernant la polyphagie de l'espècePnigalio mediterraneus Ferr. etDel. Le parasite attaque en Italie aussi bienLithocolletis millierella Stgr. etL. blancardella F., queDacus oleae Gml. Il se développe aux dépens de mineuses de feuilles au printemps et attaque de préférence leDacus en été et en automne.(More)
A new species of Oligosita Walker (Chalcidoidea: Trichogrammatidae), O. balcluthae Viggiani et Laudonia n. sp., is described as a parasitoid of the eggs of Balclutha brevis Lindberg (Homoptera: Cicadellidae) associated with crimson fountain grass, Pennisetum setaceum (Poaceae) in Italy. Morphological features and biology of the new species are discussed and(More)
A new species of Soikiella Nowicki (Hymenoptera: Trichogrammatidae) that emerged mostly from galls induced by Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) on chestnut is described from Italy. The characterization of the new taxon, Soikiella italica Viggiani sp. n., was performed through a morpho-molecular approach. A key to the species of(More)