Efficacy of postemergence herbicides for controlling curled dock (Rumex crispus L.) in wheat crops.
Curled dock (Rumex crispus L.) is a common perennial toxic weed species in wheat crop. To our knowledge, this is the distinctive scientific study proposed to evaluate the efficacy of four new chemical combinations of herbicides viz. Starane-M @ 750 ml ha-1; Clean Wave @ 800 ml ha-1; Broad-X @ 875 ml ha-1 and Allymax @ 35 g ha-1 sprayed as foliar application in wheat crop. These applications conducted with control treatment for proper comparison. Results illustrated that broad-X afforded highly significant (P<0.001) potential for controlling this weed resulting in strong positive R2 (0.84) with RMSE (0.69 & 0.80) compared to clean wave proved the evidence for model fitness. Significant (P<0.01) mortality of curled dock catalyzed by mist spraying of broad-X (91.16%; 91.55%) conferred better control efficacy 30 days after treatment. Significant (P<0.001) increase in yield (33.29%) was observed as a consequent of spraying broad-X followed by clean wave (29.63%) herbicides. The interaction of leaf area (cm2) with herbicides correlated as predicted, which indicated that manual quantification method is suitable. The productivity increased significantly by spraying broad-X (33.29%) and clean wave (29.63%) compared to control. According to our findings, the new chemical herbicides obtained a high potential for controlling this invasive weed in wheat crops.