Abstract

In agricultural culture there are numerous weeds diminishing the production which are controlled by several methods. The most common and efficient method with the modern agriculture is the chemical method of controlling weeds, using a large range of herbicides. A great part of these herbicides have long lasting remanence, even over three years. A great part of the active substances of the herbicides pollute the soil and subsequently the waters, sometimes with disastrous action for the environment. Also, some pollutants can be metabolized by culture plants which, in their turn, by consumption, can adversely affect the people’s health. The use of appropriate agronomic practices is essential while growing herbicide tolerant varieties if this technology is to remain effective. To this end, it is recommended the promotion and maintenance of careful management practices for growers who use these crops to minimize the development of multiple resistances. In spontaneous flora of Romania are many herb species that are used as medicinal plants. A significant part of these plants is found in the crops as weeds. In this paper, the main weeds with therapeutic properties from crops are presented. A description of each specie, as well as the main properties and uses for some illnesses are presented in this paper. This work also presents the main species considered as weeds in culture, the organs used, therapeutic applications and some techniques of use for such plants.