Grape production worldwide is increasingly threatened by grapevine trunk diseases (GTDs). No grapevine cultivar is known to be entirely resistant to GTDs, but susceptibility varies greatly. To quantify these differences, four Hungarian grape germplasm collections containing 305 different cultivars were surveyed to determine the ratios of GTDs based on symptom expression and the proportion of plant loss within all GTD symptoms. The cultivars of monophyletic Vitis vinifera L. origin were amongst the most sensitive ones, and their sensitivity was significantly (p < 0.01) higher than that of the interspecific (hybrid) cultivars assessed, which are defined by the presence of Vitis species other than V. vinifera (e.g., V. labrusca L., V. rupestris Scheele, and V. amurensis Rupr.) in their pedigree. We conclude that the ancestral diversity of grapes confers a higher degree of resilience against GTDs.

In this study, the effect of different foliar applications on the grapevine (Vitis vinifera L. cv. Riesling) leaf morphology was investigated. Leaf chlorophyll content was measured with an Apogee MC100 portable chlorophyllmeter, leaf thickness was investigated with a thickness gauge while the light transmittance was evaluated with a smartphone application running on a Xiaomi Redmi Note 9. Results showed that foliar applications have a significant effect on the leaf morphological traits. According to the correlation analysis of pooled samples, there is no significant relation between the monitored parameters. Interestingly if samples are split according to the applied treatments, we found a correlation between the measured traits that highlight the impact of the foliar application on the morphological characteristics. Our present research demonstrates that smartphones can be effectively integrated into agricultural studies and provide data that can complement observations.

Grape production worldwide is increasingly threatened by grapevine trunk diseases (GTDs). No grapevine cultivar is known to be entirely resistant to GTDs, but susceptibility varies greatly. To quantify these differences, four Hungarian grape germplasm collections containing 305 different cultivars were surveyed to determine the ratios of GTDs based on symptom expression and mortality rate. The cultivars of monophyletic Vitis vinifera L. origin were amongst the most sensitive ones, and their sensitivity was significantly (p<0.01) higher than that of the interspecific (hybrid) cultivars assessed, which are defined by the presence of Vitis species other than V. vinifera (e.g. V. labrusca L., V. rupestris Scheele, V. amurensis Rupr.) in their pedigree. We conclude that ancestral diversity of the grape confers higher degrees of resilience against GTDs.

Globalisation and the export- import activities of foods contribute the expansion of invasive species in the world (Tait. et al., 2021). One of these species is the spotted wing drosophila (SWD) (Drosophila suzukii, Matsumara), which is a major threat to berries. Since it has a wide range of host plants and since it is an insect with several generations and a large population, it can cause enormous damage to berries (Wiman et al., 2016, Tait et al., 2021). Our experience shows that in Hungary it causes the most damage to blackberries, but it is also an increasingly common pest in our vineyards. Successful integrated pest management (IPM) can only be implemented by understanding the insect's biological cycle and ecological requirements. It is of paramount importance to strengthen the plants' defence system, avoiding diseases that give the green light to various pest organisms. By spraying salicylic acid, which induces resistance, the berry skin thickness can be increased in the case of thinskinned grape varieties susceptible to rot (e.g., Rhine Riesling), thereby the insect damage rate can be reduced (Németh et al., 2020). The looser cluster structure by the treatments is also beneficial in preventing spread of the pest. In the current work, we present the results and experiences of the study series for the years 2021-2023.

This paper aims to detect the effects of DMR (double reasoned maturation) method, and if it is able to increase the quality of Hungary’s most distributed white wine variety, Bianca. The resistant interspecific hybrid Bianca cultivar can accumulate high sugar content during ripening, but it is prone to drastic acid loss, which can lead to deficient microbiological stability of wines. The DMR method is suitable for achieving fruit with better sugar/acid ratio due to the shrinking of the berries. The DMR treatment was found to be a possible tool for avoiding rapid acid loss in Bianca juices. Early cutting of one-year-old wood and early harvest were found to be the ideal combination for increasing quality.