So far the limited knowledge about diet of omnivores and generalist predators in olive groves has not allowed clarification their role as natural enemies. Stable isotope (δN15 δC13) analysis is a useful tool for predicting trophic position high number species, variety basal resources flux energy food web. We have explored possible consumers two important pests grove: adults Prays oleae Bern (Le...

A REVIEW of the remarkable polymorphism in the European land snail Cepaea nemoralis L. and of the various interpretations based on it has been given in a previous issue of this journal (CAIN and SHEPPARD 1954). Since the adaptive and evolutionary significance of the polymorphism is the subject of active research, a considerably better knowledge of its genetics is desirable. Subsequently, LAMOTT...

1Department of Oral Biology, School of Dentistry, Creighton University, Omaha, NE 68178, USA 2Preclinical Program, College of Dental Medicine-Illinois, Midwestern University, 555-31st Street, 102 Redwood Hall, Downers Grove, IL 60515, USA 3Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA 4Oral and Maxillofacial Surgery, School o...

Arion lusitanicus has become a major pest species in western Norway in the last few years. This species originates from southern Europe but has been spread by humans over large parts of central and northern Europe during recent decades. Slugs have traditionally been controlled by the use of molluscicides; but, as these may have serious ecological side effects, biological control of slugs is hig...

Three species of Xerolycosa: Xerolycosa nemoralis (Westring, 1861), Xerolycosa miniata (C.L. Koch, 1834) and Xerolycosa mongolica (Schenkel, 1963), occurring in the Palaearctic Region are surveyed, illustrated and redescribed. Arctosa mongolica Schenkel, 1963 is removed from synonymy with Xerolycosa nemoralis and transferred to Xerolycosa, and the new combination Xerolycosa mongolica (Schenkel,...

Occurrence of Anthocoris tomentosus Péricart, A. antevolens White, A. whitei Reuter, and Deraeocoris brevis (Uhler) in non-orchard habitats is described for areas adjacent to the pear growing regions of Yakima, WA. The four species were found on a number of tree and shrub species, especiallywillow, cottonwood, oak, alder, aspen, poplar, andbitterbrush. The four predators differed in degree of s...

The invasive Iberian slug, Arion lusitanicus, is spreading through Europe and poses a major threat to horticulture and agriculture. Natural enemies, capable of killing A. lusitanicus, may be important to our understanding of its population dynamics in recently invaded regions. We used polymerase chain reaction (PCR) to study predation on A. lusitanicus by carabid beetles in the field. A first m...