Application of Different Herbicides Doses to chemical control of weeds in garlic farms (Aliium sativum L.)

Slow growth rate low height and a thin canopy that does not cover the soil enough to sup-press weeds make garlic a poor competitor against the latter until the beginning of spring. Weed interference is affected by the time of weed emergence relative to the crop’s phonological development. The weeds, which emerge early or simultaneously with the crop, are highly competitive and they have to be managed by farmers. Most weed management strategies in cereals target seedlings, as they are the most sensitive stage of the weed. However, emergence of weed seedlings varies every year in timing, extent and intensity. Weeds produces severe yield losses in garlic fields. Prediction of weed emergence timing will allow farmers to determine the time at which most of the weeds have already emerged and, consequently, the best time to apply a control measure. In order to investigate the effect of different herbicides application with recommended doses and 25 % lower than that on weeds in garlic farms, an experiment through the completely randomized block design with three repetitions during cropping season 2012-2013 in the Maryanj village-Hamedan, the city of Hamadan was performed. The examined treatments included the use of herbicides Sethoxydim, Oxyfluorfen, Trifluralin, haloxyfop-R methyl ester, and Chlorthal-Dimethyl; all with recommended dosage respectively, 3, 1.5, 2.5, 1 liter and 8 kg per hectare and 25 % less than the recommended dose, respectively include 2.25, 1.12, 1.87, 0.75 liter and 6 kg/hectare, lack of control model (lack of weeding) and weed control model (weeding). The results showed that Oxyfluorfen herbicide with reduced dose caused remarkably reduction in a wide range of farm weeds. The only herbicide, which caused leaf scorch of garlic, was Sethoxydim which is not recommended in garlic agriculture.

کلیدواژه ها:

Garlic ، Herbicides ، Weeds ، Dose