Vol. 11, Issue 7 (2022)

Author(s):
Lavlesh Kumar, Dharm Raj Singh and Ram Singh Umrao

Abstract:
Field experiment was conducted to study the Bio-efficacy of certain botanicals and bio-pesticides against diamondback moth, (Plutella xylostella L.) on cabbage were carried out during rabi season in 2019-20 and 2020-21 at Student’s Instructional Farm (SIF) of the Department of Agronomy, C. S. Azad University of Agriculture and Technology, Kanpur Uttar Pradesh, India on cabbage variety Savitri. The P. xylostella was active throughout the year with a varying degree of infestation. Bacillus thuringiensis var. kurstaki (Dipel 8 L) @ 0.2% as spray on standing crop with 41.85% population reduction over control proved best among all treatments by reducing mean number of larvae 0.48/plant. The second most effective treatment applied to the cabbage on standing crop as spray form was Beauveria bassiana 1.15% WP @ 0.2% with 38.30% population reduction over control with mean number of larvae 0.75/plant, followed by Nimbicidine 0.15% EC (Azardirachtin 1500 ppm) @ 0.3% (37.29%), Datura (Datura stramonium L.), leaf extract @ 5% (34.06%), Tobacco (Nicotiana tabacum L.), leaf extract @ 5% (32.36%), Lantana (Lantana camera L.), leaf extract @ 5% (26.43%) and Aak (Calotropis gigantea L.), leaf extract @ 5% (24.06%) with mean number of larvae 0.84, 1.12, 1.29, 1.83 and 2.08/plant respectively, but it was statistically superior in comparison to control in which 4.98 mean larvae were recorded. In this experiment we observed that the botanical bio-pesticides proved best to manage the diamondback moth (DBM) population on cabbage crop.