Evaluation of some pulses and other crops sensitivity to Metribuzin simulated soil residue

To evaluate the sensitivity of different crops included some pulses to simulated metribuzin soil residues, an experiment was conducted in completely randomized design with factorial arrangement and four replications in Research Greenhouse of College of Agriculture, Ferdowsi University of Mashhad. Treatments included of 8 crops (chickpea, common bean, lentil, corn, wheat, barley, rape seed and sugar beet) and concentrations of metribuzin simulated residue in soil at 6 levels (0, 0.016, 0.032, 0.064, 0.128 and 0.160 mg a.i. kg-1 soil). Plants survival percentage and shoot and root biomass were measured 30 days after emergence. Plants response to metribuzin soil residue fitted with 3 and 4 parameters logistic equations to the shoot and root biomass data as a function of the herbicide soil residue concentrations and was used to calculate the dose for 50% of measured traits (ED50). Results showed that the survival and shoot and root growth were affected by metribuzin soil residue, significantly (pchickpea>common bean>corn.