Evaluation of grape phylloxera’s (Dactylosphaera vitifoliae) occurrence during the BBCH 13-71 phenophases in the 2024 vegetation year

Ailer, Štefan and Benešová, Lucia and Janás, Martin and Forneck, Astrid and Ivanova, Violeta (2024) Evaluation of grape phylloxera’s (Dactylosphaera vitifoliae) occurrence during the BBCH 13-71 phenophases in the 2024 vegetation year. In: XXIII. Slovak and Czech Conference on Plant Protection, 10-12 Sept 2024, Nitra, Slovakia.

	Text Ailer et al.-Nitra-Grape phylloxera.pdf Download (822kB)
	Text ZBORNIK-OR-NITRA-202409_vydané.pdf Download (2MB)

Abstract

The phylloxera pest is spreading rapidly nowadays. Factors contributing to this phenomenon
likely include climate change, resistance to insecticides, and the use of gentle cultivation
practices, which limit the use of active ingredients significantly. Regarding the severity of the
harm caused, the root form is the most dangerous, as evidenced by the extensive damage the
pest caused to European viticulture at the end of the 19
th
century. The aim of this research was
to study the temporal dynamics of the overwintering population’s migration and to correlate
this data to the climatic factors and the phenology of the vine. The research was conducted in
Nitra, belonging to the Nitra wine-growing region, during the phenophases BBCH 13 to 71.
The variant used during the study was Cabernet Sauvignon, rootstock SO4, in a 16-year-old
vineyard. The monitoring of the pest’s root form was executed via the bucket emergency traps
method of Powell et al. (2007), for the duration of 13 weeks. Conversely, the monitoring of the
pest’s leaf form was executed via regular visual assessment of the leaves, once every seven
days. The captured insects were evaluated by a microscope with a camera, and by assessing
meteorological factors in relation to soil moisture and temperature.
No trace of the pest’s root form was detected on the vines during the 13 weeklong monitoring
process using 9 bucket traps. These findings are related to weather fluctuations present during
the spring of 2024, which experienced multiple alternations of severely hot and cold
temperature periods. Moreover, the atmospheric precipitation volume was above average, and
the rootstock used possessed roots resistant to the pest. During the BBCH 57 phenophase, the
leaf form of the pest began to proliferate in the area, specifically on the rootstocks SO4, K5BB,
and even on the interspecific variety Hibernal. The proliferation was prominent during the
subsequent phenophases as well. The number of leaf galls on a single leaf averaged 32 and the
number of eggs in a single leaf gall averaged 57. The second generation of phylloxera’s leaf
form invades the soil as well and infests the roots of the noble vine. The pest’s infestation of
interspecific grapevine hybrids (PIWI) has not yet been thoroughly researched, while mainly
table varieties are often sold as straight rooted without resistant rootstock.

Item Type:	Conference or Workshop Item (Poster)
Subjects:	Agricultural Sciences > Agriculture, forestry, and fisheries Natural sciences > Chemical sciences
Divisions:	Faculty of Agriculture
Depositing User:	Violeta Ivanova Petropulos
Date Deposited:	10 Dec 2024 11:44
Last Modified:	10 Dec 2024 11:44
URI:	https://eprints.ugd.edu.mk/id/eprint/35170

Actions (login required)

View Item