Paper Details

Weeds control in lentil (Lens culinaris) fields sown on different times by suitable dose of linuron as a post-emergence herbicide

Ahad Taiery, Bahram Mirshekari

DOI: https://dx.doi.org/10.12692/ijb/4.6.165-169

Int. J. Biosci. 4(6), 165-169. March, 2014. (PDF)

Abstract:

The present study was aimed to weeds control in lentil fields sown on different times by suitable dose of linuron as a post-emergence herbicide in Tabriz region. Post-emergence herbicide; Linuron, was used in concentrations of 1000 cc ha-1, 1250 cc ha-1 and 1500 cc ha-1 as recommended dose to control weeds in its 2-4 and 4-6 leaves stages. The treatments were laid out in a split plot factorial experiment with 3 replicates. Mean comparisons revealed that secondary branches in lentil plants better developed up to 6 branch in spraying time of 4-6 weed leaves stage, but only 4 branch from spraying time of 2-4 weed leaves stage. There is no significant difference between spraying times of linuron on number of pods per plant of lentil in early sown (5th March) and 30 days later (5th April) dates. Completely developed pods per plant were averaged 26.5 and 20 pods in 5th March and 5th April. Based on means of data obtained, when lentil cultivated on5th March and sprayed with lorox on 4-6 weed leaves stage, grain yield increased up to 1578 kg ha-1, but in those seeds sown on the same time and sprayed with lorox on 2-4 weed leaves stage yield reduced to 1157 kg ha-1. Whereas, in late sown lentils on 5th April at both spraying times yield reduced significantly. In late sown lentils weeds did not suitably controlled. But in early sown crop farmers could decrease weeds damage by application of 1250 cc ha-1 linuron. In our experiment weeds above ground biomass ranged from 2.1 g m-2 in 5th April sowing time and 4-6 weed leaves stage up to 0.62 g m-2 in 5th March sowing time and 2-4 weed leaves stage. This study resulted that in early sown lentils herbicide application can be economized. It seems that early sowings could be effective in weeds control in lentil fields.