Measurement of vineyard weeds by geographical informatic methods (GIS)

In the recent years, the non-chemical methods of weed control in vineyards are playing a larger and larger part. This is specially true in mountain vineyards where the weeds play great rolls in the protection of soils against erosion. Our examinations were carried out in the thousand-years-old Pannonhalma wine region, where a 20-years old, 1.82 ha Chardonnay plantation was selected. The space between rows was 3.5 m, and between stocks 1.2m with the gradient of 9-12%. The objective was, how we can determine the spreading dynamics of some perennial weeds (Elymus repens, Calamagrostis epigeios, Bromus inermis, Solidago gigantea, Urtica dioica) in herbicide non-treated areas. The weed monitoring was done using the Baldzs-Ujvarosi method and at the same time the DGPS device was used to detect the borders of weed spots with a high precision. During treatments, the changes of weed spreading were detected. Based on the comparison of two sequent years, it was concluded that only the mechanically treated weed spots were increased. Our final aim was to ellaborate long term weed control system strategies.