Evaluation of Fipronil 80 WG (Regent 80 WG) against Grape Thrips in Comparison with Selected Insecticides
Department of Agricultural Entomology University of Agricultural Sciences, Dharwad-580 005, Karnataka, India
International Journal of Horticulture, 2018, Vol. 8, No. 17 doi: 10.5376/ijh.2018.08.0017
Received: 20 Jul., 2018 Accepted: 27 Aug., 2018 Published: 28 Sep., 2018
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Preferred citation for this article:
Balikai R.A., 2018, Evaluation of Fipronil 80 WG (Regent 80 WG) against grape thrips in comparison with selected insecticides, International Journal of Horticulture, 8(17): 197-203 (doi: 10.5376/ijh.2018.08.0017)
During two consecutive seasons, the field experiments were carried out at the Horticultural Research Station, Bijapur (Tidagundi), Karnataka, India to evaluate Fipronil 80 WG (Regent 80 WG) against grape thrips in comparison with selected insecticides. The results revealed that, two sprays of Fipronil 80 WG @ 50 g a.i./ha provided highest protection against thrips (95.6 and 94.5% during first and second year, respectively) over untreated check followed by Fipronil 80 WG @ 40 g a.i./ha, Fipronil 5 SC @ 40 g a.i./ha, Imidacloprid 200 SL @ 45 g a.i./ha, Spinosad 45 SC @ 84.375 g a.i./ha and Standard check (Monocrotophos 36 WSC @ 360 g a.i./ha followed by Dimethoate 30 EC @ 521 g a.i./ha). Any of the insecticides tested did not show any type of phytotoxic symptoms on grape vines at the dosages tried viz., Fipronil 80 WG @ 40, 50, 100, 200 g a.i./ha, Fipronil 5 SC @ 40 g a.i./ha, Spinosad 45 SC @ 84.375 g a.i./ha, Imidacloprid 200 SL @ 45 g a.i./ha and Standard check during both the years of study. Fipronil 80 WG @ 50 g a.i./ha recorded highest yield of 10.2 and 11.6 kg/vine during first and second seasons, respectively and did not differ statistically from Fipronil 80 WG @ 40 g a.i./ha, Spinosad 45 SC @ 84.375 g a.i./ha, Standard check, Imidacloprid 200 SL @ 45 g a.i./ha and Fipronil 5 SC @ 40 g a.i./ha.
Fipronil; Grapevine; Imidacloprid; Phyotoxicity; Spinosad; Thrips