Research article

EVALUATION OF PRE AND POST EMERGENCE HERBICIDES THROUGH HERBIGTION BASED WEED MANAGEMENT PRACTICES ON GROWTH AND YIELD OF DIRECT SOWN AEROBIC RICE (Oryza sativa L.)

Divya Sree T1, Nambi J2, Sundari A3 and Saravanan K.R.4

Online First: December 27, 2022


A Field experiment was conducted at Annamalai University experimental farm during the seasons of Summer, 2020. to find out the effect of herbigation based weed management practices in direct sown aerobic rice on growth and yield of rice. The experiment was laid out in randomized block design with eight treatments and replicated thrice. The results showed that among the different herbicidal treatments, PE herbigation of pretilachlor 6 % + bensulfuron methyl 0.6 % GR @ 10 kg ha-1 on 3 DAS fb PoE herbigation of bispyribac sodium 10 % SC @ 200 mL ha-1 on 20 DAS recorded lower total weed density (48.70 m-2) and dry weight of weeds (242.48 kg ha-1), higher weed control index (84.02 %) on 60 DAS which contributed to receive higher growth attributes of plant height ( 145.2 cm), LAI (6.41) and yield parameters of no. of tillers m-2 (454), no. of filled grains panicle-1 (132), test weight ( 19.6 g) which increased the grain yield (6156 kg ha-1) and straw yield (9334.9 kg ha-1) due to effective management of weeds in rice crop and it was on par with PE herbigation of pretilachlor 6 % + bensulfuron methyl 0.6 % GR @ 10 kg ha-1 on 3 DAS fb HW on 30 DAS which was significantly superior to other treatments. However weedy check recorded lower values in terms of growth and yield attributes due to heavy weed infestation

Keywords

Drip Irrigation, Weed management, Herbigation, Direct sowing, Aerobic rice