Assessment of integrated management technologies in Bt-cotton under drip irrigation

Abstract

An experiment entitled “Assessment of Integrated Management Technologies in Bt-Cotton under Drip Irrigation” was conducted at Water Management Research Scheme, Vasantrao Naik Marathwada Krishi Vidyapeeth Parbhani (M.S.) during the year 2021-22 and 2022-23 in randomized block design with three replications. The experiment comprised of eight treatments T1- Control Wider Planting (150 X 30 cm), T2- Control Dense Planting (90 X 30 cm), T3-Removal of Monopodia at 60 DAS (DP), T4- De-topping at 75 DAS (DP), T5- Removal of Monopodia at 60 DAS + De-topping at 75 DAS (DP), T6- Spraying of Mapiquate Chloride @ 25 g a.i. at 60 DAS (DP), T7- Use of Polymulch (DP) and T8- Polymulch + Removal of Monopodia at 60 DAS + De-topping at 75 DAS (DP). The results obtained from this experiment shows that growing of cotton under polythene mulch along with removal of monopodia at 60 DAS and de-topping at 75 DAS (T8) recorded significantly highest no. of bolls per plant (46.04, 37.23 and 41.65), yield plant-1 (139.53, 154.13 and 146.83 g plant-1) and boll weight (4.58, 6.51 and 5.54 g), seed cotton yield (3314, 3911 and 3613 kg ha-1 ) and GMR (Rs. 314830, Rs. 391087 and Rs 352958 ha-1 during 2021-22, 2022-23 and in pooled analysis as compared to all other treatments respectively. while removal of monopodia at 60 DAS and de-topping at 75 DAS (T5) recorded significantly highest NMR (Rs.185301, Rs.237401 and Rs. 211351 ha-1) and Benefit: Cost ratio (3.28, 3.24 and 3.26) during 2021-22, 2022-23 and in pooled respectively as compared to rest of the treatments.