|Title||Integrated herbicides application at different timings for weed management and wheat productivity|
|Authors||Moinullah, Shahen Shah, Arshad Jalal, Tariq Shah, Wisal Ahmad and Asad Ali Khan|
Wheat crop is facing a foremost decline in yield due to weeds in our all cropping systems. So, it is essential to restrict such pervasive class of pest. The present trial was laid out to study the integrated herbicides application at different timings for weed management and yield of wheat productivity. Aqueous allelopathic extracts of different weeds (field bind weed, johnson grass) and synthetic herbicides (Clodinafoppropargyl, Bromoxynil+MCPA) in different combinations were applied at 7, 30 and 60 days after sowing (i.e., emergence, tillering and jointing stage), respectively. Integrated herbicides application and their timings significantly affected weed density, fresh weight, dry weight, number of spikes, plant height and wheat yield. The results showed that lower weeds density (67.3 m-2) was resulted from combination of 25% field bind weed+25% johnson grass+25% Clodinafop+25% Bromoxynil while lesser fresh weed biomass (82.3g m-2), dry weed biomass (18.6g m-2), plant height (89.6 cm), spike length (11.3 cm) and maximum grain yield (3665 kg ha-1) were recorded from mixture of 50%Clodinafop+50% Bromoxynil applied plots. Among application timings lower weeds density (85.1m-2), fresh weed biomass (98.6g m-2), dry weed biomass (20.6g m-2), spike length (11.0 cm) and more grain yield (3465kg ha-1) were noted at tillering stage. The application of 50% Clodinafop+50% Bromoxynil at tillering time demonstrated superior in terms of lower weed fresh biomass (g m-2), weed dry biomass (g m-2), spike length (cm) and higher grain yield, whereas less weed density (m-2) were documented in application of 25%field bind weed extract+25% johnson grass+25% Clodinafop+25% Bromoxynil at tillering time. It is concluded that application of 50% Clodinafop+50% Bromoxynil at tillering time resulted in higher grain yield and less weeds number and biomass.