Host-parasitoid systems are characterized by a continuous development of new defence strategies in hosts and counter-defence mechanisms in parasitoids. This co-evolutionary arms race makes host-parasitoid systems excellent for understanding trade-offs in host use caused by evolutionary changes in host immune responses and parasitoid virulence. However, knowledge obtained from natural host-paras...

Insect parasitoids and their insect hosts represent a wide range of parasitic trophic relations that can be used to understand the evolution of biotic diversity on earth. Testing theories of coevolution between hosts and parasites is based on factors directly involved in host susceptibility and parasitoid virulence. We used controlled encounters with potential hosts of the Aphidius ervi wasp to...

An Integrated Management program to control Musca domestica L. was developed by evaluating cultural 1 chemical control, cultural 1 biological control 1 granular bait (IMP 1), and cultural 1 chemical 1 biological control 1 granular bait (IMP 2) in poultry houses in Argentina. Adult fly density was estimated by a modified Scudder-grid method. Percentage of house fly parasitism was estimated by di...

Multitrophic interactions are likely to be altered by climate change but there is little empirical evidence relating the responses of herbivores and parasitoids to abiotic factors. Here we investigated the effects of drought on an above/below-ground system comprising a generalist and a specialist aphid species (foliar herbivores), their parasitoids, and a dipteran species (root herbivore).We te...

Understanding the nature of information quality in the context of consumer information search on a website is vital for Information Systems as well as for marketing managers who want to use their websites for strategic purposes. This study brings together the Information Systems (IS) Success Model and consumer information search literature to propose and test a comprehensive model investigating...

Self-service technologies (SSTs) enable individuals to be independent and act at their own pace in their own time in consuming services that would ordinarily require delivery through a human resource. One emerging trend in SSTs is the implementation of such technologies to support individual training and learning, thus adapting to individuals' needs and pace. We leverage the DeLone and McLean I...

This paper discusses a longitudinal study that explored the relationship between use of organizational memory and knowledge (OM/K) and knowledge worker productivity within the engineering group at a nuclear power plant. Three data points were taken over five years. An OM/K System (OM/KS) was identified that improved effectiveness/productivity of the organization. The basic components of the OM/...

Homalodisca coagulata (Say) (Hemiptera: Cicadellidae) eggs 1–10 days of age were exposed to Gonatocerus ashmeadi Girault, Gonatocerus triguttatus Girault, and Gonatocerus fasciatus Girault (all Hymenoptera: Mymaridae) in no choice laboratory trials to investigate egg age utilization and to determine which egg ages are vulnerable to attack by these three parasitoids. The H. coagulata egg ages th...