Impact of Damage by Cerambycid Wood Borers on Biochemical Properties of Grapevine.

Abstract

Abstract Vitis vinifera being a perennial vine, is ravaged by various categories of insect pests. In the recent past the cerambycid wood borer Stromatium barnatum F. is emerging as a most destructive pest along with already long persisting another species of cerambycid wood borer Celosterna scabrator F. resulting in huge losses. Investigations on “Impact of damage by cerambycid wood borers, on biochemical properties of grapevine” were carried out during 2021–2022. Field experiments were carried out in grape orchards of Vijayapura District (Karnataka: India), and laboratory analytical experiments on the various biochemical parameters associated with grape berries and leaves were conducted at Biochem Research and testing laboratory, Incubatee, University of Agricultural Sciences, Dharwad (Karnataka: India). Results revealed that chlorophyll a, chlorophyll b, total chlorophyll, total carotenoids from leaves, total soluble solids, titratable acidity, total phenols and anthocyanins from berries were decreased in wood borer affected vines when compared to borer free vines. Accumulation of total tannins was recorded in wood borer affected vines from both the species when compared to borer free vines. Berries from C. scabrator infested vines recorded mean total tannins of 8.18 ± 0.09 mg CE/100g. Similarly, increase in tannin content was seen in berries derived from S. barbatum infested vines with a mean value of 7.95 ± 0.10 mg CE/100g. Berries from borer free vines had lower total tannin content of 5.55 ± 0.12mgCE/100g. The study provided knowledge about effect of wood borers on the qualitative losses of grapevine in terms of changes in biochemical properties of both leaves and berries.