The research results come from a field experiment which was carried out over 1995-1997. The effect of weed infestation on potato yielding was determined by means of the coefficients of correlation and the analysis of regression. There was noted a high negative correlation between the weed number and air-dry matter and the total yield of trade fraction tubers, one tuber weight, and weight of tubers under one plant and potato plant height. The relationship was linear. For agricultural application mechanical-and-chemical weed control is recommended with a double herbicide treatment (before and after emergence) and mechanical-and-chemical weed control with a mixture of herbicides, before potato emergence.

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