nteraction effects of different concentrations of Mesosulfuron + Iodosulfuron + Diflufenican (Othello) herbicide and soil moisture content on control of Sinapis arvensis in wheat

Environmental conditions such as soil moisture have a significant effect on herbicides efficacy. In order to evaluate the effect of Othello herbicide in different soil moisture conditions on wild mustard and wheat, a greenhouse experiment was conducted as split plot based on randomized complete block design with three replications. Three levels of soil moisture including field capacity, 75% field capacity and 50% field capacity, and 0, 33, 66, 99, 132 and 165 grams of active ingredient of Mesosulfuron + Iodosulfuron + Diflufenican per hectare were the experimental treatments. Results showed that the concentration required to reduce the dry matter content of wild mustard by 50% in the field capacity was 71. 57 g. a. i /ha of herbicide, while in 75% and 50% of the field capacity, it was increased to 88. 69 and 112. 11 g of active ingredient per hectare, respectively. The required concentration to reduce 50% of dry weight of wheat in the field capacity was 86. 85 g. a. i / ha, while it reached to 102. 5 and 73. 95 g. a. i /ha at75% and 50% moisture content, , respectively. The results of the data showed that at 50% moisture content of the field capacity, lower concentrations of this herbicide would also have adverse effects on wheat.