Grafting of recovered shoots reduces bois noir disease incidence in vineyard. (November 2022)

• Record Type: Journal Article
• Authors: Moussa, Abdelhameed; Quaglino, Fabio; Faccincani, Monica; Serina, Flavio; Torcoli, Sara; Miotti, Niccolò; Passera, Alessandro; Casati, Paola; Mori, Nicola
• Is Part Of: Crop protection. Volume 161(2022)
• Publication Date: 2022-11
• Subjects: Grapevine yellows -- 'Candidatus phytoplasma solani' -- Vitis vinifera L. -- Recovery -- Sustainable control strategy; Plants, Protection of -- Periodicals; 632.05
• DOI: 10.1016/j.cropro.2022.106058
• Languages: English
• ISSNs: 0261-2194

Abstract

Abstract: Bois noir (BN) disease of grapevine is associated with ' Candidatus Phytoplasma solani' (CaPsol). Due to its multifaceted ecology, BN control is extremely difficult. Several studies showed that BN recovery can be elicited by abiotic stresses and treatment with resistance inducers. In this study, field trials along with molecular analyses have been conducted to evaluate if grafting of recovered shoots can increase the BN recovery rate in symptomatic grapevines and decrease the new CaPsol infection rate on asymptomatic grapevines. Field trials were performed in two vineyards (cv. Chardonnay/Kober 5BB) in Franciacorta (Lombardy Region, northern Italy). Grafting effects were evaluated by symptom observation and CaPsol detection by nested-PCR stamp gene amplification for three consecutive years and compared with non-grafted control vines. Obtained data showed that BN incidence was lower in grafted plants, mainly due to a statistically significant increase of recovery rate, four times higher than in non-grafted plants. These data indicated that grafting of recovered shoots can efficiently induce BN recovery, opening an interesting scenario for its utilization in sustainable strategies of vineyard management. Highlights: Grafting of recovered shoots is highly efficient. Grafting of recovered shoots drastically decreases bois noir incidence. Grafting of recovered shoots significantly increases BN recovery rate but does not affect new bois noir infection rate. Grafting can be a useful procedure for long-term BN management.