Spring steps against grapevine golden yellow disease
One of the most serious grapevine diseases of our time, grapevine golden yellow disease, can cause serious economic damage. The most important means of controlling the disease is effective action against the American grapevine cicada, which is responsible for its spread. The National Food Chain Safety Office (Nébih) draws the attention of producers and hobby garden owners to the importance of spring work: pruning, then destroying the cuttings and washing off spraying can play an important role in protecting the plantations.

(Photo: Pixabay)
Grapevine golden yellow disease has already been confirmed in 18 counties and 21 wine regions in Hungary by the Nébih laboratory. Phytoplasma infection is currently most severe in Zala and Veszprém counties. The basis for preventing the disease is the purchase and planting of quality-certified propagation material controlled by the authority. The most important means of prevention and control of infection is effective protection against the American grapevine cicada, which spreads the pathogen. This time, Nébih summarizes the necessary actions to be taken in spring for effective protection.
Don’t miss the end-of-winter pruning
At this time, plant parts infected with pathogens and pests must be removed, such as moldy clusters remaining on the canes or the support system, damaged, frost-damaged, and canes and branches that have dried up due to bacterial or fungal infection. Superfluous rootstock or noble variety canes that appear at the base of the vine and on the trunk must also be completely removed. Pruning is usually advisable when the daytime temperature does not drop below 0°C, which is already the case in the early spring months. During early spring pruning, it is particularly important to collect and destroy the resulting cuttings, as the cicadas overwinter in the form of eggs in the two-year-old parts of the vine, under the bark, and can spread further in the plantation through the cuttings. It is advisable to burn the pruned woody parts in compliance with the relevant fire regulations or work them into the soil after finely chopping them.
The late-winter wash-off spraying also plays a role in thinning out the cicada eggs (along with other pests) that overwinter in the woody parts
The hatching of the larvae of the American grapevine cicada lasts from mid-May to early July, depending on the weather and the location of the plantation, so it is important to observe the hatching larvae on the underside of the lower leaves of the vine from the beginning of May. At the beginning of the growing season, during green work, it is advisable to remove the unnecessary shoots growing from the lower part of the stem and the trunk, preferably before plant protection treatments. This operation must be repeated regularly in the plantation. Nébih draws attention to the observance of plant protection regulations. It also requests that suspicions of the disease be reported to the authorities immediately, given that the golden yellow phytoplasma is a notifiable, quarantine pest.
Nébih
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Spring steps against grapevine golden yellow disease
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