BIOEFFICACY OF IMIDACLOPRID AND THIACLOPRID AGAINST CHILLI APHID (Aphis gossypii GLOVER) IN MID HILLS OF MEGHALAYA
The field experiment was conducted to evaluate the bioefficacy of imidacloprid and thiacloprid against chilli aphid (Aphis gossypii) during post kharif season of 2017at ICAR Research Complex for North Eastern Hill Region, Umiam, Meghalaya, India. The experiment was laid out in randomized block design (RBD) with seven treatments and three replications. Chilli (cultivar: Guntur Hope) seedlings (35 days old) were transplanted in 3mX4 m area with a spacing of 60 cm (R-R) × 40 cm (P-P). Total treatments viz. imidacloprid 17.8% SL (25 and 50 g a.i./ha), thiacloprid 21.7% SC (54 and 108 g a.i./ha) and dimethoate 30% EC (300 and 600 g a.i./ha) were applied twice at fifteen days intervals along with untreated control. The bioefficacy study revealed that the overall mean reduction of chilli aphid population was highest in imidacloprid at 50 g a.i. ha-1 with 80.33% reduction followed by thiacloprid (79.84%). The maximum fruit yield was also recorded in imidacloprid @ 50 g a.i./ha with 28.80 q/ha.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.