Response of wheat varieties to substituted urea herbicides
2002
Hashim, S. | Marwat, K.B. | Hassan, G. (NWFP Agricultural Univ., Peshawar (Pakistan). Dept. of Weed Science)
Field experiment was conducted to study the varietal response of two wheat varieties viz., Tatara and Ghaznavi-98 to six different types of submitted urea herbicides viz., Dicuran-MA 60 WP (Chlortoluron) at a rate of 2.5 kg/ha. Arelon 50 S (Isoproturon) at a rate of 2.0 lit/ha. Tribunil 70 WP (Methabenzthiazuron) at a rate of 2.0 kg/ha. Dosanex 80 WP (Metoxuron) at a rate of 1.5 kg/ha. Tolkan 50 WP (Isoproturon) at a rate of 2.0 kg/ha. Graminon 50 FW (Isoproturon) at a rate of 2.0 lit/ha in comparison with Buctril-M40 EC (Bromoxynil plus MCPA) at a rate of 1.3 lit/ha. and a weedy chick. Observations on weed density (Grassy and Broadleaf m-2), weedsþ dry weight (g), grain yield (kg ha-1) and yield components of wheat varieties were recorded. Dicuran-MA 60 WP was the most effective herbicide in reducing the weeds dry weight to 27 g m-2 compared to 106 g m-2 in the weedy check. Application of various herbicides did not affect the 1000-grain weight significantly. All the herbicides were effective in increasing grain yield compared to weedy check. Maximum grain yield of 5036 and 4990 kg ha-1 was obtained from plots treated with Tolkan and Tribunil, respectively, however, it was statistically at par with all other herbicides tested, but significantly higher than the weedy check. Ghaznavi-98 gave higher yield of 4884 Kg than Tatara (435-5 Kg ha-1).
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