During the study an isolated walnut population were investigated in Eastern Transylvania, Romania. Our aims were to collect information for improving the present assortment of scion cultivars for National and International Breeding Program. Altogether 147 walnut individuals were investigated in order to study the main biological characteristics of the trees and the main physical and qualitative characteristics of the nuts. The walnut population studied

Abstract: In field experiments over a period of five years the effects of farming systems and habitat structure were investigated on staphylinid assembly in Central European apple and pear orchards. The investigated farms were placed in three different geographical regions with different environmental conditions (agricultural lowland environment, regularly flooded area and woodland area of medium height mountains). During the survey, a total number

Apple scab, caused by Venturia inaequalis, is one of the most serious diseases of apple throughout the Europe. In our experiments the ascosporous mortality were compared using different plant extracts. These were: Artemisinin 3% and 6% (Artemisia annua), Chelidonine 3% and 6% (Chelidonium maius), Menthol 3% and 6% (Mentha piperita), Populin 3% and 6% (Populus nigra), Linalool + Linalyl acetate + Linalyl acetate 3% and 6% (Salvia sclarea), Thymol

The effects of different plant extracts on apple aphid (Aphis pomi) mortality were compared under laboratory conditions. The apple aphid is one of the most resistant pests against insecticides throughout the Central Europe. The selection of insecticide-resistance pest biotypes can be delayed by decreasing the frequency and intensity of genetic selection. This might be accomplished by applying insecticides only when and where absolutely necessary

In Romania, walnut Juglans regia L. is an important fruit crop, although most of the fruit production comes from non-grafted walnut trees, which are natural hybrids. Breeding programs have been launched during last 30 years to develop new cultivars with uniform fruit quality. In addition, foreign cultivars have been introduced and tested to establish a valuable walnut genepool. To improve the present assortment of generative rootstocks in walnut

The abundance, habitat preference, seasonal dynamics and prey preferences of parasitoid rove beetles Aleochara bipustulata (L.) (Coleoptera: Staphylinidae: Aleocharinae) were investigated in 16 Hungarian agricultural fields. Aleochara bipustulata was the 7th most frequent species in the cumulative samples, and widely occurred in woodland areas of mountains with medium height. The species has no particular soil preferences and its activity density

Landscape ecology is new and continuously developing field of ecology, of which primary focus is the spatial and temporal heterogeneity of the environment and ecological processes. It has been widely adopted by animal ecologists as well. In this review we present arguments regarding the need of including the landscape ecological approaches in the study of the distribution of organisms in Romania. Based on the recent developments, we present three

Field experiments were conducted to investigate the mechanism underlying patterns of rove beetles population in apple and pear orchards (1998 to 2002) and winter wheat (2006 to 2007) following treatment with broad-spectrum insecticide in Hungary. The capacity of predatory staphylinid species to feed on cereal pests was measured in the laboratory at room temperature, with 6 species tested in petri dishes. Almost 23% of the Hungarian and 13% of the

A Long Term Ecological Research was carried out in a Hungarian oak forest, in “Bükk” National Park starting with 1972. During the faunistical studies 3,602 insect species and more than 200,000 individuals were collected. The dominant orders were Coleoptera (1,051 species), Lepidoptera (803 species), Hymenoptera (470 species) and Diptera (400 species). The relative species abundance (RSA) for all insects collected in all years of sampling period

The effects of broad spectrum and selective insecticides on rove beetles (Coleoptera: Staphylinidae) were compared in apple orchards and wheat fields from Hungary. The most common species in orchards were: Omalium caesum, Dexiogyia corticina, Mocyta orbata, Coprochara bipustulata, Sphenoma abdominale, Drusilla canaliculata, Styloxys insecatus, Palporus nitidulus, Heterothops dissimilis, Mocyta fungi, Pella limbata, Pycnota vicina and Hemitropia sordida.The