תוצאות חיפוש: מאמר

Our ability to improve biological control of insect pests depends on our understanding of factors that limit the reproductive success of their natural enemies in the field. Pest control by parasitoids in agricultural fields can be compromised by the availability of sugar resources. We studied sugar availability for Anagrus parasitoids that parasitize the eggs of leafhopper pests (genus Erythroneura) in vineyards in northern California.

The present study compares activity-densities and species richness of spiders in two dominant habitat types in the arid agroecosystem in the northwest Negev Desert- Intensively cultivated arable land and semi-desert.

The overall objective of the present study was to determine the loading limits of composts that should be applied annually to irrigated wheat. 

It was studied whether the spider fauna in desert crops is influenced by the surrounding landscape in a similar way to that found in temperate climates.

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.