Field evaluation of insecticides against Spodoptera litura (Fab.) in tropical sugar beet Talha Muhammad Abu, Rahman M.M., Amin Ruhul, Hossain Md. Emam, Khan Md. Shahidul Islam* Department of Entomology, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh *Corresponding authors' E-mail : shahidul4486@sau.edu.bd
Online published on 20 December, 2024. Abstract Among the treatments tested, the T3 treatment using insecticides combination, cypermetrin + chlorpyriphos (Nitro 505 EC) and T5 using this methoxam + chlorantraniliprole (Virtako 40 WG) @ 2.0 ml/L and 0.2 g/L of water respectively were identified as the most effective methods for controlling S. litura and achieving high sugar beet yields. The T3 treatment exhibited the lowest incidence of infected plants (7.00) and beets (4.67), while the untreated control group (T9) had the greatest incidence of infested plants (10.33) and beets (14.33). In terms of efficacy over control, the T3 treatment exhibited the greatest effectiveness (83.80%) followed by T5 (78.52%) reduction over the control (T9), while the lowest effectiveness (56.58%) was recorded in the T1 treatment (Acicarb 85 WP @ 4.5 g/L of water) among the insecticides. The T3 treatment had the greatest brix value of 17.33% and pool percentage of 12.33, whereas the T5 treatment had a brix value of 17.00. The T9 (untreated control) treatment exhibited the lowest brix level (13.43%) and pool percentage (9.66%). Based on the field experiment, T3 and T5 were the most effective insecticides for managing S. litura infestation in tropical sugar beet in field condition. Top Keywords Beta vulgaris, Brix, Cypermetrin + chlorpyriphos (Nitro 505EC), Methoxam + chlorantraniliprole (Virtako 40WG) pol, Spodoptera litura. Top |