Eco-friendly management approach to control cabbage flea beetle in Jashore region of Bangladesh

Abstract

The experiment was conducted during rabi season 2018-19 and 2019-20 at Regional Agricultural Research Station Jashore to develop a bio-rational based sustainable management approach to control flea beetle of cabbage. The experiment was laid out in a randomized complete block design with three dispersed replications. Cabbage seedlings were transplanted on 10^th November 2018 and 11^th November 2019, respectively. The experiment was five different treatments with one control treatment viz. T₁ = White color sticky trap + Matrin (Biotrine 0.5% @ 1ml/L of water) @ 1ml/L of water, T₂ = Spraying of Antario @1.0 ml/L of water, T₃ = Alternate spraying of fizimite and Antario @ 1ml/L of water, T₄ = Spraying of Bio-clean (D-Lemonine 5% SL) + application of recharge @ 3gm/L of water, T₅ = Spraying with Nitro 505EC (Chlorpyriphos + Cypermethrin) @ 2.0 ml/L of water and T₆ = Untreated control. The whole plant was thoroughly covered by spray emulsion. The lowest number of flea beetle (14.59 in 2018-19 and 10.33 in 2019-20) was found in the treatment T₅ (Spraying with Nitro 505EC (Chlorpyriphos + Cypermethrin) @ 2.0 ml/L of water) and highest (35.76 in 2018-19 and 42.53 in 2019-20) in control (T₆) treatment. The lowest percent of head infestation of cabbage was also recorded in T₅ treatment (14.03% in 2018-19 and 5.10% in 2019-20) and the highest in T₆ treatment (27.61% in 2018-19 and 23.69% in 2019-20). The highest yield (33.40 t/ha in 2018-19 and 32.49 t/ha in 2019-20) was recorded from T₅ treatment and the lowest (26.87 t/ha in 2018-19 and 24.78 t/ha in 2019-20) in control (T₆) treatment in both the year. On an average, 16.55-20.33 flea beetle were captured in yellow sticky trap per week in both the year. The highest gross margin (438466 Tk.//ha in 2018-19 and 262366 Tk.//ha in 2019-20) was also observed in the T₅ treatment in both the year and the lowest (342916 Tk.//ha in 2018-19 and 187666 Tk.//ha in 2019-20) in untreated control (T6) treatment. Finally, the results revealed that the treatment T₅ was more profitable compared to other approaches as well as the highest crop yield with marginal benefit cost ratio.

Progressive Agriculture 31 (2): 68-73, 2020