Vol. 11, Issue 12 (2022)

Author(s):
Venukumar S, Nadaf AM, Prashantha A, Tatagar MH, Dadapeera A Peerjade and Sateesh Pattepur

Abstract:
Intensive and extensive cultivation of grapes leads to serious pest problem in major grape-growing areas of the world. One hundred insect and mite pests from different Indian grape-growing states have been identified as damaging distinct grapevine regions. Among different insect pests, adult flea beetles are observed from mid-July and reach peak numbers in October–November and cause damage to the plants immediately after pruning in October. Several newer molecules and botanical insecticides were evaluated against grape flea beetle at HREC, Tidagundi, Karnataka during 2021-22. Among the insecticides, Lambda cyhalothrin 5 EC @ 0.50ml / l was recorded lowest number of flea beetle and bud damage followed by Lambda cyhalothrin 4.9 CS, Fipronil 80 WG, Spinosad 45 SC, Cyantraniliprole 10.26 OD, Thiamethoxam 25 WG, Flonicamid 50 WG, and Alphamethrin 10 EC. Finally, the marketable yield (t/ha) was also significantly highest in the treatment Lambda cyhalothrin 4.9 CS @ 0.50ml / l (44.35 t / ha) followed by Cyantraniliprole 10.26 OD @ 0.7ml / l, Lambda cyhalothrin 5 EC @ 0.50ml / l, Fipronil 80 WG @ 0.06g / l, Alphamethrin 10 EC @ 0.5ml / l, Thiamethoxam 25 WG @ 0.25g / l, Spinosad 45 SC @ 0.25ml / l, Flonicamid 50 WG @ 0.3g / l and Azadirachtin 1 EC @ 2.0ml / l (44.32, 40.68, 38.95, 38.72, 38.12, 36.49, 35.42 and 32.02 t / ha, respectively).