Effect of Sowing Window Crop Ecologies and Herbicides on ACCase Resistant Phalaris minor in Wheat under Irrigated Conditions

Abstract

newline The present study entitled Effect of Sowing Window Crop Ecologies and Herbicides on ACCase Resistant Phalaris minor in Wheat under Irrigated Conditions was conducted at the Research Farm, Division of Agronomy, newlineSKUAST- J, Chatha during Rabi season of 2021-22 and 2022-23. newlineThe experiment-I entitled Effect of normal sowing window crop ecologies and herbicides on ACCase resistant Phalaris minor in wheat under irrigated conditions was laid out in split plot design with sowing window viz. (5th Nov, 15th Nov and 25th Nov) as main plot treatments and weed management as sub plot treatments which were replicated thrice. The different pre, early-post and post emergence herbicides were applied for control of ACCase resistant Phalaris minor in wheat. The application of fertilizers were done in accordance with the recommended package and practices of SKUAST-J, Chatha. The experiment results revealed that wheat crop sown on 5th November sowing window recorded significantly lowest Phalaris minor density and biomass at different growth stages of wheat which leads to enhancement in yield attributes, yield and net returns and B:C ratio. Among the various weed management practices, weed free recorded significantly higher yield attributes and yield. However, among the various herbicidal treatments, pre-emergence application of Pyroxasulfone at127.5 g ha-1 recorded significantly lowest Phalaris minor density, biomass and higher yield attributes and yield, gross returns, net returns which was statistically at par with the early post emergence application of Pyroxasulfone 127.5 g ha-1, post-emergence application of Pinoxaden 40 g ha-1and pre- emergence application of Flumioxazin 125 g ha-1 while post-emergence application of Pinoxaden 40 g ha-1 recorded higher B:C ratio. Similarly, another field experiment was conducted under late sowing window with 3 different sowing window (15th Dec, 25th Dec and 5th Jan) and having similar weed management treatments as experiment- I. Among the late sowing window, 15th December sowi