Effect of herbicides and row-spacing on maize (Zea mays L.)
2003
Ali, R. | Khalil, S.K. | Raza, S.M.,NWFP Agricultural Univ., Peshawar(Pakistan). Dept. of Agronomy
Cultural as well as chemical weed control is a basic requirement and majorcomponent of management in most crop production systems. Various levels ofpre-em (Harness extra) and post-em (atrazine) herbicides in combination withnarrow, medium and wider row spacing were evaluated to investigate theireffect on days to emergence, dry weight of weeds m-2, days to tasseling, daysto maturity and biological yield. Row spacing did not significantly affect anyparameter, different levels of Harness extra and atrazine significantly affectedall the parameters. Harness extra resulted in minimum dry weight of weeds(22.84 g m2) and maximum biological yield (9472.17 kg ha-1) at 2.5 L ha-1.Minimum days to emergence (7.33 days), maximum days to tasseling (55.17days) and maturity (103.17 days) were recorded at 2.0 L Harness extra ha-1.Maximum dry weight of weeds (92.25 g m2), minimum days to tasseling (51.58days), maturity (92.25 days) and biological yield (7652.71 kg ha-1) wererecorded in check plots. It was concluded that herbicide application increaseddays to tasseling, maturity and biological yield, while decreased days toemergence and dry weight of weeds.
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