Tolerance of Avena fatua and Phalaris minor to some graminacides
2005
Hassan, G. (NWFP Agricultural Univ., Peshawar (Pakistan). Dept. of Weed Science) | Hanif, Z. (NWFP Agricultural Univ., Peshawar (Pakistan). Dept. of Weed Science) | Mehboob-ul-Lateef | Khan, M.I. | Khan, S.A.
To study the tolerance of Phalaris minor and Avena fatua to graminacides, an experiment was conducted at the Department of Weed Science NWFP Agricultural University Peshawar under lab conditions, during Kharif 2003, using completely randomized design, having five treatments and two replications. The herbicide Topik 15 WP (clodinafop-propargyl) was applied at 0.11, 0.08, 0.06 and 0.04 kg ha-1 and Puma super (fenoxaprop-p-ethyl) was used at 0.6, 0.5, 0.4 and 0.3 kg ha-1. Both herbicides were applied as post emergence. An untreated check (0 kg ha-1) was also included in the respective herbicide for the comparison. The data were recorded on fresh weight (g) of these weed species and the data were subsequently subjected to %reduction from the weedy check. Regression analysis was run on the percent reduction to check data in the individual herbicide and the species separately. The subsequent computation of GR50 and GR90 after deriving the regression equations revealed that the herbicide clodinfop was more effective as compared to fenoxparop-p-ethyl, while wild oats was more sensitive as compared to canary grass to either of the herbicides tested. Thus, lower doses are recommended for the fields infested only with the wild oats alone, when treated with either of the tested graminacides.
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