K. MUCSI
Csongrád County Plant Health and Soil Protection Service, 6800 Hódmezövásárhely, P.O. Box 99., HUNGARY; e-mail: kmucsi-csnta@fki.gov.hu
E. PETRO
Centre Service for Plant Health and Soil Conservation, 1519 Budapest, P.O. Box 340., HUNGARY

Result of the first-year structure analysis were reported in 2000. The investigations have been continued and the results were compared with those of the previous year.

This year again six surveys have been made in the region of Szeged and the results were analyzed on the basis of formal and functional structure elements. The obtained results were analyzed and compared with data of the American literature.

Changes of the distribution, in time, of the population density were examined in 2000, in dry and rainless weather, while in 2001, in a relatively rainy weather.

Made in the frame of the SKK/SooC project.