Efficacy of some new herbicidal molecules on grassy and broadleafweeds in wheat-II
2004
Khan, I. | Hassan, G. | Khan, M.I.,NWFP Agricultural Univ., Peshawar(Pakistan). Dept. of Weed Sciences
Field study was conducted at Malakandher Research Farm, NWFPAgricultural University Peshawar during Rabi 2002-03 to investigate theeffectiveness of different herbicides including new molecules tribenuron-methyl and thifensulfuron-methyl against grasses and broadleaf weeds. Theexperiment was laid out in randomized complete block design with 4replications. The experiment comprised of 11 herbicides and a weedy check.The herbicidal treatments were post emergence applications of Rocket 15WDG (thifensulfuron-methyl) at the rate 0.037, Rocket 75 WDG(thifensulfuron-methyl) at the rate of 0.05, Tribenuron-methyl 50 WDG(tribenuron-methyl) at the rate of 0.05, Logran Extra 64 WDG (triasulfuronplus terbutryn) at the rate of 0.15, Buctril-M 40 EC (bromoxynil plusMCPA) at the rate of 0.45, Isoproturon 50 WP (isoproturon) at the rate of0.01, Affinity 50 WDG (carfentrazone ethyl ester) at the rate of 0.013,Agritox 50 DF (MCPA) at the rate of 0.49, and Aim 40 WP (chlorfluazuron)at the rate of 0.96 kg a.i. ha-1. Ghaznavi-98 variety of wheat in plot sizeof 5x 1.5 m-2 was planted during the third week of October 2002. Datawere recorded on the weed density after application of herbicides, numberof spikes m-2 number of grain spike-1 and grain yield (t ha-1). Forcontrolling weeds, Affinity proved to be the best, giving only 18.25 ascompared to 250.5 weeds m-2 in weedy check plots. Similarly, the maximumgrain yield was recorded in Affinity 50 WDG, Buctril-M 40EC and LogranExtra 64 WDG with grain yield of 4.133, 3.866 and 3.599 t ha-1,respectively. Minimum yield (2.133 t ha-1) was recorded in the weedy checkplots.
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