To Compare the Efficacy of Some Herbicides in Tuberose, Polianthes tuberosa L., Fields
The experiment was conducted in 2006 and 2007 to evaluate the efficacy of some herbicides against weeds in tuberose fields in Dezful, Iran. The experimental design was a completely randomized block with 14 treatments and three replications. Treatments included application of paraquat POST at 0.6 kg ai/ha, oxyfluorfen PRE at 0.48 kg ai/ha, ioxynil POST at 0.66 kg ai/ha, trifluralin PPI at 1 kg ai/ha 10 days before planting, trifluralin PPI at 1 kg ai/ha, EPTC PPI at 4 kg ai/ha, oxadiazon PRE at 0.36 kg ai/ha, alachlor PRE at 2.5 kg ai/ha, diuron PRE at 1.6 kg ai/ha, atrazine PRE at 1.2 kg ai/ha, atrazine PRE at 0.8 kg ai/ha one handweeding, 2,4-D haloxyfop-r–methyl POST one week after 2,4–D applicationat 1.44 0.08) kg ai/ha, weedy and weed free checks. In both the years of the experiments, compared to the weedy check, application of diuron and atrazine, with 100% and 97%, were the most effective treatments in reducing the total number of weeds, respectively. 2, 4 - D haloxyfop - r – methyl with 95% was the most effective treatment in reducing total dry weight of weeds. Compared with the weedy check, after weed free check application of atrazine one handweedingwith 5.87 ton/ha-1 was the most effective treatmentinincreasing spike yield. In2006 and 2007, application of ioxynil and atrazine one handweeding had the highest level of corm weight respectively. Considering the results of this experiment, application of each of atrazine PRE at 0.8 kg ai/ha one handweeding, oxyfluorfen PRE at 0.48 kg ai/ha, ioxynil POST at 0.66 kg ai/ha, atrazine PRE at 1.2 kg ai/ha or handweedings throughout the growing season of tuberose are recommended.
Journal of Pesticide in Plant Protection Sciences, Volume:2 Issue: 2, 2016
109 to 122  
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