The effect of mechanical and chemical weed control on the yield of onion (Allium cepa L.) seedlings cultivated fall in Hormozgan province.

Subject Areas : Weed Research Journal

بهروز بابایی نژاد ¹ , جعفر آلبوغبیش ² , علیرضا دادخواه ³

1 - ندارم
2 - کارشناس جنگل و مرتع
3 - عضو هئیت علمی

Received: 2017-01-15 Accepted : 2017-09-30 Published : 2016-11-21

Keywords: yield, Oxyfluorfen, weed and weedling, Ioxynil, Oxadiazon,

Abstract :

In order to evaluate the effect of mechanical and chemical weed control on the yield of onion seedlings cultivated fall in Hormozgan province. The experimental design was a randomized complete block with eight treatments and three replications in research farm of Agriculture Shamil district of Bandar Abbas city functions the growing season was 2015-2016. The treatments were: Control (no control), Oxyfluorfen (Goal) (EC%24) at 2 Lit.ha-1, Sethoxydim (Nabu-s) (EC%12.5) at 3 Lit.ha-1, Haloxyfop-R methyl ester (Gallant Super) (EC%10.8) at 0.75 Lit.ha-1, Oxadiazon (Ronstar) (EC%48) at 3 Lit.ha-1, Chlorthal dimethyl (dacthal) (WP%75) at 8 Kg.ha-1, Ioxynil (Totril) (EC%22.5) at 2 Lit.ha-1 and weeding (control weeds growing in all periods). The results showed that the density, dry weight of weeds and yield of onion was affected by treatments. Mechanical methods (weeding) in between treatments the highest effect on the density, dry weight of weeds and yield of onion was. So that the yield of onion increased at a rate of 5.50 tons.ha-1. Among the herbicides, herbicide oxyfluorfen (2 to 4 leaf stage of weeds) after mechanical method have the greatest impact on the density, dry weight of weeds and yield of onion accounted. As weed density and dry weight, by 65.2, 63.1% respectively, and yield of onion as much as by 509% increased performance. In total, herbicide efficacy in controlling weeds oxyflorfen and Ioxynil, C. album L., A. retroflexus, P. oleracea, M. sylvestris L. and C. rotundus L. was good. Chlorthal dimethyl on A. retroflexus and C. rotundus L., Oxadiazon on M. sylvestris L., A. retroflexus, and C. rotundus L. weed control and herbicide Haloxyfop-R methyl ester, P. oleracea and C. album L. and C. rotundus L. was good. Primarily mechanical methods (weeding) with good control of weeds and the highest yield of onion best treatment was experimental and oxyflorfen in the second herbicide and another herbicide Oxadiazon and Ioxynil is recommended in the Hormozgan province.