Management of diamonback moth, Plutella xylostella L. on cabbage crop by release of Bracon hebetor Say under field conditions

A field experiment was conducted during February, 2017 at the Horticulture Instructional Farm, Pt. Kishorilal Shukla College of Horticulture and Research Station, Rajnandgaon (Chhattisgarh). Different treatments of Bracon hebetor were evaluated for their efficacy against P. xylostella on cabbage crop by releasing Bracocards viz., T1 Bracocard (4 cocoons), T2 Bracocard (8 cocoons), T3 Bracocard (10 cocoons), T4 Bracocard (15 cocoons), T5 Bracocard (20 cocoons) and an untreated control. Among the treatments T5 Bracocard (20 cocoons) was found most effective against P. xylostella as it recorded lowest larval population of (9.73/plant). The second best treatment was T4 (12.20 larvae /plant) followed by T3 (12.60 larvae /plant), T2 (13.47 larvae /plant) and T1 (16.27 larvae /plant).