Yabancı Otlarla Mücadelede Allelopatinin Kullanımı

Abstract

Since the beginning of the agriculture, several control methods against weeds that cause problems have been utilized in our country and
the whole world including cultural, physical, mechanical, biological and chemical ones. As the amount of herbicides which is used for
keeping the weeds reducing the crop yield during agricultural production at a certain threshold levels increases, the problems such as
resistance to herbicides, environmental pollution, residue, reduction in biodiversity have arisen. Becoming this situation a worldwide
problem, development of some alternative control methods and use of natural compounds instead of herbicides have been begun to find out.
Allelopathy is also one of these methods. ‘Allelopathy’ has been defined as showing effect of one plant (including microorganisms)
positively or negatively on another by emitting chemical substances to the environment and chemical substances having allelopathic effect
are called ‘allelochemicals’. Allelopathy as weed control method is in the form of natural mulch, cover crops, crop rotation, mixed cropping,
green manure, toxic extracts obtained from allelopathic plants, volatile oils, natural herbicides and use of allelopathic crop varieties.
Allelopathy studies for weed control have gaining more importance and more comprehensive researches are needed.