Investigation On Using Cover Crops For Weed Control In Pistachio Orchards In ？anl？urfa

In this study, the efficacy of the cover crop method in the control of weeds, which are a problem in pistachio orchards, was investigated. The study was conducted in two different pistachio orchards with 10 and 25 years (Young and Old Garden) in Birecik county of Sanliurfa. Four different cover crops such as Vicia sativa L. (common vetch), V.0sativa (common vetch) + Hordeum vulgare L. (barley), V. villosa Roth. (hairy vetch), V. villosa Roth. (hairy vetch) + H. vulgare L. (barley) were used in the application of cover crops between rows. Weedy parcel was used for control. In the experiment, cover crops effecting on weed coverage (%), density (plant/m2), wet and dry weight of weeds were determined. As a result, 16 weed species were found to be in 9 different families. The average values of the weed coverage area (%) according to the application were found to be 8.33% in V. sativa + H. vulgare, 8.92% for V. villosa + H. vulgare, 9.17 % for V. sativa, 11.67% for V. villosa and 34.42% for the control, respectively in young garden (10 years). In the old garden (25 years), weed coverage area (%) were 2.83% for V. villosa + H. vulgare, 3.58% for V. villosa, 3.75% for V. sativa + H. vulgare, 4% for V. sativa and 17.50% for the control, respectively. All cover crop treatments were reduced the weeds coverage (%)