Field experiments were undertaken in 2017-18 at Dryland (Karewa) Agriculture Research Station, SKUAST-K, throughout the major cropping seasons of 2017 and 2018 to assess the influence of different post and pre emergence herbicides treatment on weed dynamics in maize (Zea mays L.). The experiment was set up in a randomised block design with four replications, with Bio-605 being the variety utilised. There are five options for therapy. Five treatments were used: pre-emergence herbicides Atrazine 50 percent WP @ 1.0 kg ha-1 and paraquat dichloride 24 percent SL @ 0.5 kg ha-1, post-emergence herbicides 2,4-D sodium salt 58 percent WSC @ 1.0 kg ha-1 (application at 2-3 leaf stage of weeds), hand weeding as standard check and weedy check as control, and hand weeding as standard check and weedy check as control. The impact of various pesticides on weed density was shown to be substantial. No weeds were found in plots controlled by manual weeding. In Echinochloa spp., Eleusine indica, Digitaria sanguinalis, Amaranthus viridis, Sorghum halepense, and Cyperus spp., the weed population was 5.51, 5.4, 3.73, 5.12, 4.28, and 41.4m-2, respectively, in Atrazine treated plots @ 1.0 kg ai ha-1 as pre-emergence. However, weedy check had the highest weed population, with 21.54 m-2, 20.87 m-2, 19.16 m-2, 21.5 m-2, 16.7 m-2, and 60.7 m-2. There was no significant difference between 2,4-D and paraquat dichloride 24 percent SL @ 0.5 kg ai ha-1. Except for Cyperus spp., which have densities of 51.37 m-2 and 43.04 m-2, sodium salt has a 58 percent WSC @ 1.0 kg ai ha-1.
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