תוצאות חיפוש: מאמר

Wasp offspring do seem to adjust their numbers in response to host starvation, but not strongly

The potato tuber moth Phthorimaea operculella (Zeller) is a major pest of potatoes in the field, and of tubers stored under ambient temperatures post-harvest. The encyrtid parasitoid Copidosoma koehleri (Blanchard) effectively controls the pest in the field in some countries. We tested whether C. koehleri can also reduce tuber moth populations in storage.

Wild pollinators, bees in particular, may greatly contribute to crop pollination and provide a safety net against declines in commercial pollinators. However, the identity, life history traits, and environmental sensitivities of main crop pollinator species have received limited attention. They sampled wild bees in three crop systems in a mosaic Israeli Mediterranean landscape.

This study examined how Muslim farmers perceive the issue of impurity of compost sources and the extent to which the conflict between traditional and modern values affects compost use.

Parasitoids that encounter a previously parasitized host inspect it externally and internally, sometimes eventually laying additional eggs (superparasitism). The fitness effects of increased clutch sizes generated through superparasitism are widely studied, whereas the consequences of multiple host probings during the inspection received less attention.

This article offers an overview of the vicissitudes faced by Israeli agriculture during the past century. 

The aims were: Understanding how the relationship between species richness and its determinants depends on the interaction between scales at which the response and explanatory variables are measured; Quantifying the relative contributions of local, intermediate and large-scale determinants of species richness in a fragmented agro-ecosystem; Testing the hypothesis that the relative contribution of these determinants varies with the grain size at which species richness is measured.

It was asked- to what extent do predators use non-crop habitats as refuges or breeding sites in the desert agroecosystem of the northern Negev, Israel? thet investigated the use of natural desert habitat, planted trees (Eucalyptus), and a summer crop (sunflowers) by winter-wheat inhabiting spiders.