This project is evaluating the effects of allelopathic plant species on a range of weed species that are problematic in Kurdistan. (PhD student: Hadi Aliki)
Allelopathy is a natural approach to weed control which is based on the beneficial or harmful effects of one plant upon another and can involve either cultivated or wild plant species. The allelopathic effect of these plants is produced through chemical compounds from the plant which pass into the soil by a number of methods (Weston, 2005).These compounds with allelopathic potential exist in all plant tissues, including leaves, flowers, fruits, stems, root, rhizomes and seed (Putnam and Tag, 1986).
Many crops such as sorghum, sunflower, alfalfa, barley, clovers, sesame, tobacco, sweet potato, rice, brassica, rye, wheat and oat can release allelopathic compounds and can have a suppression effect on weeds (Miller, 1996; Weston, 1996). Batish et al. (2002) also reported that many weeds themselves can affect crops by releasing allelopathic compounds. Examples include Canada thistle, cocklebur, common lambsquarters, field bindweed, foxtail sp, Kochia, pigweed, velvetleaf, yellow nutsedge, wild oat and wild mustard. Allelopathic compounds produced by different plants include p-coumaric, syringic, vanillic, p-hydroxbenzoic and protoatechuic acid, scopolin, chlorogenic acid, isochlorogenic acid and a-naphthol (Chou and Lin 1976; Mandava1985).
There are numerous studies which show the beneficial effects of allelopathy. However, there is little research about using allelopathic plants to control weeds in the Kurdistan region. Research exists in countries near to Iraq such as Iran, Syria, Jordan, Turkey and Saudi Arabia which have a similar environment and species distribution.
The aims of this project are as follows: -
Kurdistan Region Government and the Ministry of Higher Education