Comparison of the efficiency of different herbicides in rice fields with a focus on the use of pre-emergence herbicides
Subject Areas :
زهرا Safari
1
(M.Sc)
حسین Ajamnourozi
2
(Associated Professor)
معصومه Younesabadi
3
(Assistant Professor)
Keywords: Yield, Rice, herbicide, Weeds, Dry seeding,
Abstract :
For compare the efficiency of different herbicides in controlling narrow-leaved weeds of rice drying fields of Tisa cultivar with the focus on the use of pre-growth herbicides, this study was conducted as a randomized complete block design (RCBD) with 4 replications. Experimental treatments was Stomp herbicide application (3 liters per hectare), Rifit (3.25 liters per hectare), Oxadiargyl (3250 ml), council (150 g), Clomazone (1000 cc), Thiobencarb (6 liters), Ronstar (3 liters), Penoxsulam (250 cc), Pendimethalin (Prowl) (3 liters) and hand weeding (titanium consumed).Effect of herbicide application on number of grainclusters, grain yield, direct harvest yield, total weight of harvested rice plants, fresh weight of paddy, dry weight of paddy, dry weight of straw, straw yield, number of weeds and dry and fresh weigths of Echinochloa crus-galli,Cyperus rotundus, Portulaca, Cucumis melo, Fallopia convolvulus and Physalis alkekengiwere significantat the probability level of 1% but on thousand grain weight the probability level of 1% were significant. The results showed that the lowest number of Echinochloa crus-galli (1.62), the lowest fresh weight of Echinochloa crus-galli (147.43 g) and the lowest dry weight of Echinochloa crus-galli (33.8 g) were related to Penoxsulam treatment and the highest number of Echinochloa crus-galli (12.47), the highest fresh weight of Echinochloa crus-galli (477.27 g) and the highest dry weight of Echinochloa crus-galli (110.5 g) were related to Rifit herbicide treatment. In general, the results showed that in order to better control the common weeds in the rice field, the use of herbicides was better than weeding.
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