Authors give report on the results of collection carried out between 1999 and 2002 on various trees and shrubs in Budapest and its surroundings, in Diósjenô and in Pilicsév. Out of the 29 woody plant species studied lachnid species were found on 19. A total of 17 lachnid species were identified belonging to 6 genera (Schizolachnus, Tuberolachnus, Eulachnus, Stomaphis, Lachnus and Cinara). Stomaphis mordvilkoi Hille Ris Lambers, 1933 is new for the Hungarian fauna. Of the 10 ant species attended lachnids Lasius niger (Linneus, 1758) was the most frequent.
Two new species in the Hungarian fauna, Stomaphis mordvilkoi Hille Ris Lambers and Stomaphis juglandis Petrovi∞ were collected from trunks of Juglans regia. Aphid colonies were intensely parasitized, and attended by ants.
About 2500 arthropod species
immigrate, or carried by wind, or introduced by man in the orchards, under
Hungarian climatic conditions. However, the number of the apple pest species is
approximately 30. Owing to the effect of the relationships among the plant-phytophagous-zoophagous species those could
colonize the orchard for which the apple provides suitable food sources and
whose populations are not regulated or are regulated by a weak efficiency by
parasitoids and predators. These populations create the primary pest
communities. When the individual number of the parasitoid and predator species
is reduced by the broad-spectrum insecticides, the population density of those
phytophagous species could increase whose populations was restricted up to that
time. In this case the secondary pest communities could develop. The integrated
pest management provides the possibilities to solve the problems caused by the
regular use of broad-spectrum insecticides. The real requirement is to find and
to harmonize those methods which regulate the population dynamics of the
species of the primary pest communities.