Vol. 11, Issue 10 (2022)

Author(s):
Venkatesh Hosamani, Ragavendra Achari, Lingamurthy KR, Venkateshalu and PM Gangadharappa

Abstract:
Jasmine bud worm, Hendecasis duplifascialis Hampson (Lepidoptera: Crambidae) becoming major threat in the recent years in all jasmine growing areas irrespective of cultivars. In this view the study was aimed to manage bud worm, therefore field experiment was conducted in Koppal district, Karnataka – India during kharif season in 2015-16 and 2016-17. Eight insecticides including control were evaluated for bio efficacy against jasmine bud worm. The results indicated that among the insecticides during first and second spray significantly lowest per cent of bud worm damage on jasmine at 3 DAS, 7 DAS and 10 DAS was noticed in the treatment T1- Emamectin Benzoate (5 % SG) @ 0.25 gm / lit 8.08, 2.33, 2.00 & 5.75, 2.33, 1.42 respectively in pooled data and followed by this application of Flubendiamide (39.35% SC) @ 0.2 ml / lit 9.17, 3.50, 2.75 & 6.50, 2.83, 1.67 during first and second spray respectively. All the insecticides showed positive effect on the control of bud worm than control. Whereas, untreated control recorded significantly highest per cent of bud damage at all intervals during both the spray (20.25, 19.00, 18.83, 17.75 & 16.17, 15.17, 15.17 & 14.58 during first and second spray respectively on pooled basis). Significant difference was noticed in flower yield indicating varied effects of treatments. T1 and T2 receiving Emamectin Benzoate (5 % SG) @ 0.25 gm / lit & Flubendiamide (39.35% SC) @ 0.2ml / lit respectively registered significantly higher flower yield (8119 and 7855 kg / ha). Whereas, control recorded significantly lowest flower yield of 3985 kg per ha-1.