תוצאות חיפוש: מאמר

The abundance of parasitoids on plants that harbor their monophagous herbivorous host often correlates with host numbers. However, when hosts are polyphagous, the species-specific characteristics of the plants can affect parasitoid abundance as well. We asked whether parasitoids that attack a polyphagous host aggregate on individual plants with high host densities, and whether plant-related factors also account for the parasitoids’ abundance on the plants.

They tested the effects of herbaceous vegetation enhancement on the abundance and richness of plants and arthropods in a wine-producing vineyard in Israel; compared the abundance and species richness of plants and arthropods between a plot seeded with local annual plants and an unseeded plot; compared soil content and grape quality parameters in seeded versus unseeded plots in the vineyard. 

To evaluate the perimeter trapping strategy as a control method, field tests were conducted in three different host species of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann), in Israel. 

Foraging behavior for hosts in parasitoids resembles that of predators with respect to finding, evaluating and manipulating of the prey. Host handling time may depend on the life history of the parasitoid and can be affected by oviposition experience. Additionally, handling time can be affected by host aggregation, species, size and state (parasitized or not). We studied handling times in the egg-larval parasitoid wasp Copidosoma koehleri. 

Controlled land spreading of olive mill wastewater (OMW) is now adopted in several Mediterranean countries as a practical alternative for its disposal.

This paper focuses on the large cosmopolitan genus Xylocopa as an additional provider of agricultural pollination services. Aspects of these bees’ life-history, social organization, and foraging ecology are discussed in the context of their potential role as crop pollination agents.

We modeled the possible effect of limited kin discrimination on larval aggression in polyembryonic wasps. In these organisms, each egg divides clonally to produce several genetically identical embryos inside an arthropod host. If more than one egg is laid inside a host (superparasitism), several clones compete for the host resources. In some species, a proportion of embryos develop into sterile soldier larvae that attack competitors inside the host.