Assessment of canopy management technologies in Bt cotton under drip irrigation

The field investigation entitled ‘‘Assessment of canopy management technology in Bt cotton (Gossypium hirsutuam L.) under drip irrigation’’ was conducted during Kharif season 2023-2024 at Irrigation and water management scheme (Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani, M.S., India). The experiment was laid out in Randomized Block Design with three replications and eight treatments viz., T₁-Control wider planting, T₂-Control dense planting (90×30 cm), T₃-Removal of monopodia at 60 DAS(DP), T₄-De-topping at 75 DAS (DP), T₅-Removal of Monopodia at 60 DAS (DP) + De-toping at 75 DAS (DP), T₆-Spraying of Mapiquate Chloride @ 25gm a.i. at 60 DAS (DP), T₇-Use of Polymulch (DP) T₈-Polymulch + Removal of Monopodia at 60 DAS + De-topping at 75 DAS (DP). Result of the experiment shows, that use of Polymulch + Removal of Monopodia at 60 DAS + De-topping at 75 DAS (DP) T₈. found helpful for more number of bolls plant^-1 (41.80), yield plant^-1 (162.50 g), seed cotton yield (4530 kg ha^-1), lint yield (1009 ka ha^-1) and GMR (₹ 3,39,725), which was at par with Use of Polymulch (DP) (T₇). Whereas plant height (126.42 cm), number of sympodia (16.23) were found higher in T₇ treatment (Use of Polymulch (DP)) and NMR (₹ 1,74,059) and B:C ratio (2.43) was recorded higher in T₅ treatment (Removal of Monopodia at 60 DAS (DP) + De-toping at 75 DAS (DP)).