بررسی میزان تحمل گیاه زراعی کینوآ به کاربرد چند علف کش

A field study was conducted to assess the response of quinoa to the application of some pre and post emergence herbicides in the quinoa fields of Astan Ghods Razavi, in Anabad located in Bardascan in Khorasan-Razavi province, Iran in summer of 2019. The layout was a completely randomized block design with three replications. Treatments were including: post emergence application of atrazine (Gezaprime® WP 80%) 1000 g/ha, metribuzin (Sencor® WP 70%) 750 g/ha, phenmedipham+ desmedipham+ ethofumesate (Betanal progress OF® EC 27.4%) 3 l/ha, quizalofop-p-tefuryl (Pantra® EC 4%) 1.5 l/ha and clotidim (Select super® EC 12%) 0.8 l/ha plus hand weeding and untreated control. Herbicides were sprayed at 6 leafy stages of quinoa in September 2019. Visual assessment of herbicide injury on weeds and quinoa was done at four weeks after spraying (WAS). Weed density and dry matter were also measured at four WAS. Data were statistically analyzed by SAS (9.2) software and means were grouped by Duncan multiple range test at 0.05 level of probability. Visual assessment of injury showed complete death of quinoa when sprayed with atrazine, metribuzin and phenmedipham+ desmedipham+ ethofumesate with little damage or no damage on volunteer barley. Results showed application of atrazine (1000 g/ha), metribuzin (750 g/ha) and phenmedipham+ desmedipham+ ethofumesate (3 l/ha) caused significant and severe damage on quinoa and may not be recommended to be used for weed control in quinoa then. Application of quizalofop-p-tefuryl (1.5 l/ha), clodinafop (0.8 l/ha) and clotidim (0.8 l/ha) well controlled narrow-leaved weeds with no reverse effect on quinoa. Therefore these herbicides seems suitable to be used for narrowed-leaf weed control in quinoa fields.