Stručni rad

Conifer extracts and complexed copper (Cu) as modern resistance inducers in grapevines

David Gluhić ; Veleučilište Rijeka, Poljoprivredni odjel Poreč, Poreč, Hrvatska *

* Dopisni autor.

Sažetak

Modern viticulture in Croatia is facing major challenges that include climate change, increasingly intensive pressure from phytopathogenic organisms (particularly grapevine downy mildew caused by the oomycete Plasmopara viticola), and increasingly strict European Union regulatory measures aimed at reducing the input of heavy metals and conventional plant protection products into agroecosystems. Although long established in practice, the traditional application of contact copper fungicides carries the risk of elemental copper accumulation in the soil and the occurrence of phytotoxicity. The concept of induced resistance (elicitation) through the application of natural biostimulatory compounds emerges as a sustainable alternative and complement to conventional protection programs. This paper examines the synergistic effect of conifer (pinophyte) extracts and complexed copper (Cu) as modern inductors of grapevine immunity. While plant extracts rich in secondary metabolites act as signals of pathogen attack that trigger the synthesis of phytoalexins (such as stilbenes) in the grapevine and strengthen cell walls, technologically advanced complexed copper ensures high systemic mobility and micronutritional activation of defense enzymes at multiples lower doses of pure copper per hectare. The application of these elicitors enables effective disease control, preserves the soil microbiome, and supports the goals of green and sustainable viticultural production in Croatia.

Ključne riječi

grapevine; conifer extracts; complexed copper; elicitors; systemic acquired resistance (SAR); downy mildew (Plasmopara viticola); phytoalexins

Hrčak ID:

353304

URI

https://hrcak.srce.hr/353304

Datum izdavanja:

26.10.2026.

Podaci na drugim jezicima: hrvatski

Posjeta: 0 *